| Package | Description | 
|---|---|
| java.applet | Provides the classes necessary to create an applet and the classes an applet
uses to communicate with its applet context. | 
| java.awt | Contains all of the classes for creating user
interfaces and for painting graphics and images. | 
| java.awt.color | Provides classes for color spaces. | 
| java.awt.datatransfer | Provides interfaces and classes for transferring data
between and within applications. | 
| java.awt.dnd | Drag and Drop is a direct manipulation gesture found in many Graphical
User Interface systems that provides a mechanism to transfer
information between two entities logically associated with presentation
elements in the GUI. | 
| java.awt.event | Provides interfaces and classes for dealing with different
types of events fired by AWT components. | 
| java.awt.font | Provides classes and interface relating to fonts. | 
| java.awt.geom | Provides the Java 2D classes for defining and performing operations
on objects related to two-dimensional geometry. | 
| java.awt.image | Provides classes for creating and modifying images. | 
| java.awt.image.renderable | Provides classes and interfaces for producing
rendering-independent images. | 
| java.awt.print | Provides classes and interfaces for a general printing API. | 
| java.beans | Contains classes related to developing
beans -- components
based on the JavaBeans™ architecture. | 
| java.beans.beancontext | Provides classes and interfaces relating to bean context. | 
| java.io | Provides for system input and output through data streams,
serialization and the file system. | 
| java.lang | Provides classes that are fundamental to the design of the Java
 programming language. | 
| java.lang.annotation | Provides library support for the Java programming language
 annotation facility. | 
| java.lang.instrument | Provides services that allow Java programming language agents to instrument programs running on the JVM. | 
| java.lang.invoke | The  java.lang.invokepackage contains dynamic language support provided directly by
 the Java core class libraries and virtual machine. | 
| java.lang.management | Provides the management interfaces for monitoring and management of the
Java virtual machine and other components in the Java runtime. | 
| java.lang.reflect | Provides classes and interfaces for obtaining reflective
 information about classes and objects. | 
| java.math | Provides classes for performing arbitrary-precision integer
 arithmetic ( BigInteger) and arbitrary-precision decimal
 arithmetic (BigDecimal). | 
| java.net | Provides the classes for implementing networking applications. | 
| java.nio | Defines buffers, which are containers for data, and provides an overview of the
other NIO packages. | 
| java.nio.channels | Defines channels, which represent connections to entities that are capable of
 performing I/O operations, such as files and sockets; defines selectors, for
 multiplexed, non-blocking I/O operations. | 
| java.nio.channels.spi | Service-provider classes for the  java.nio.channelspackage. | 
| java.nio.charset | Defines charsets, decoders, and encoders, for translating between bytes and
Unicode characters. | 
| java.nio.file | Defines interfaces and classes for the Java virtual machine to access files,
 file attributes, and file systems. | 
| java.nio.file.attribute | Interfaces and classes providing access to file and file system attributes. | 
| java.nio.file.spi | Service-provider classes for the  java.nio.filepackage. | 
| java.rmi | Provides the RMI package. | 
| java.rmi.activation | Provides support for RMI Object Activation. | 
| java.rmi.dgc | Provides classes and interface for RMI distributed
garbage-collection (DGC). | 
| java.rmi.server | Provides classes and interfaces for supporting the server
side of RMI. | 
| java.security | Provides the classes and interfaces for the security framework. | 
| java.security.acl | The classes and interfaces in this package have been
 superseded by classes in the java.security package. | 
| java.security.cert | Provides classes and interfaces for parsing and managing
 certificates, certificate revocation lists (CRLs), and
 certification paths. | 
| java.security.interfaces | Provides interfaces for generating RSA (Rivest, Shamir and
 Adleman AsymmetricCipher algorithm)
 keys as defined in the RSA Laboratory Technical Note
 PKCS#1, and DSA (Digital Signature
 Algorithm) keys as defined in NIST's FIPS-186. | 
| java.security.spec | Provides classes and interfaces for key specifications and algorithm
 parameter specifications. | 
| java.sql | Provides the API for accessing and processing data stored in a 
data source (usually a relational database) using the 
JavaTM programming language. | 
| java.text | Provides classes and interfaces for handling text, dates, numbers, and messages
in a manner independent of natural languages. | 
| java.time | 
 The main API for dates, times, instants, and durations. | 
| java.time.chrono | 
 Generic API for calendar systems other than the default ISO. | 
| java.time.format | 
 Provides classes to print and parse dates and times. | 
| java.time.temporal | 
 Access to date and time using fields and units, and date time adjusters. | 
| java.time.zone | 
 Support for time-zones and their rules. | 
| java.util | Contains the collections framework, legacy collection classes, event model,
date and time facilities, internationalization, and miscellaneous utility
classes (a string tokenizer, a random-number generator, and a bit array). | 
| java.util.concurrent | Utility classes commonly useful in concurrent programming. | 
| java.util.concurrent.atomic | A small toolkit of classes that support lock-free thread-safe
 programming on single variables. | 
| java.util.concurrent.locks | Interfaces and classes providing a framework for locking and waiting
 for conditions that is distinct from built-in synchronization and
 monitors. | 
| java.util.jar | Provides classes for reading and writing the JAR (Java ARchive) file
format, which is based on the standard ZIP file format with an
optional manifest file. | 
| java.util.logging | 
Provides the classes and interfaces of 
the JavaTM 2
 platform's core logging facilities. | 
| java.util.prefs | This package allows applications to store and retrieve user and system
preference and configuration data. | 
| java.util.regex | Classes for matching character sequences against patterns specified by regular
expressions. | 
| java.util.stream | Classes to support functional-style operations on streams of elements, such
 as map-reduce transformations on collections. | 
| java.util.zip | Provides classes for reading and writing the standard ZIP and GZIP
file formats. | 
| javax.accessibility | Defines a contract between user-interface components and an assistive technology
that provides access to those components. | 
| javax.activation | |
| javax.activity | Contains Activity service related exceptions thrown by the ORB machinery during
unmarshalling. | 
| javax.annotation | |
| javax.annotation.processing | Facilities for declaring annotation processors and for
 allowing annotation processors to communicate with an annotation processing
 tool environment. | 
| javax.crypto | Provides the classes and interfaces for cryptographic operations. | 
| javax.crypto.interfaces | Provides interfaces for Diffie-Hellman keys as defined in
RSA Laboratories' PKCS #3. | 
| javax.crypto.spec | Provides classes and interfaces for key specifications and algorithm
parameter specifications. | 
| javax.imageio | The main package of the Java Image I/O API. | 
| javax.imageio.metadata | A package of the Java Image I/O API dealing with reading and writing
metadata. | 
| javax.imageio.spi | A package of the Java Image I/O API containing the plug-in interfaces
for readers, writers, transcoders, and streams, and a runtime
registry. | 
| javax.imageio.stream | A package of the Java Image I/O API dealing with low-level I/O from
files and streams. | 
| javax.jws | |
| javax.jws.soap | |
| javax.lang.model | Classes and hierarchies of packages used to model the Java
 programming language. | 
| javax.lang.model.element | Interfaces used to model elements of the Java programming language. | 
| javax.lang.model.type | Interfaces used to model Java programming language types. | 
| javax.lang.model.util | Utilities to assist in the processing of
 program elements and
 types. | 
| javax.management | Provides the core classes for the Java Management Extensions. | 
| javax.management.loading | Provides the classes which implement advanced dynamic
        loading. | 
| javax.management.modelmbean | Provides the definition of the ModelMBean classes. | 
| javax.management.monitor | Provides the definition of the monitor classes. | 
| javax.management.openmbean | Provides the open data types and Open MBean descriptor classes. | 
| javax.management.relation | Provides the definition of the Relation Service. | 
| javax.management.remote | Interfaces for remote access to
        JMX MBean servers. | 
| javax.management.remote.rmi | The RMI connector is a connector for the JMX Remote API that
      uses RMI to transmit client requests to a remote MBean server. | 
| javax.management.timer | Provides the definition of the Timer MBean. | 
| javax.naming | Provides the classes and interfaces for accessing naming services. | 
| javax.naming.directory | Extends the javax.naming package to provide functionality
for accessing directory services. | 
| javax.naming.event | Provides support for event notification when accessing naming and
directory services. | 
| javax.naming.ldap | Provides support for LDAPv3 extended operations and controls. | 
| javax.naming.spi | |
| javax.net | Provides classes for networking applications. | 
| javax.net.ssl | Provides classes for the secure socket package. | 
| javax.print | Provides the principal classes and interfaces for the 
JavaTM Print Service API. | 
| javax.print.attribute | Provides classes and interfaces
that describe the types of JavaTM Print
Service attributes and how they can be collected into attribute sets. | 
| javax.print.attribute.standard | Package javax.print.attribute.standard
contains classes for specific printing attributes. | 
| javax.print.event | Package javax.print.event contains event classes  and listener interfaces. | 
| javax.rmi.CORBA | Contains portability APIs for RMI-IIOP. | 
| javax.rmi.ssl | Provides implementations of  RMIClientSocketFactoryandRMIServerSocketFactoryover 
the Secure Sockets Layer (SSL) or Transport Layer Security (TLS) protocols. | 
| javax.script | The scripting API consists of interfaces and classes that define
Java TM Scripting Engines and provides
a framework for their use in Java applications. | 
| javax.security.auth | This package provides a framework for authentication and
 authorization. | 
| javax.security.auth.callback | This package provides the classes necessary for services
 to interact with applications in order to retrieve
 information (authentication data including usernames
 or passwords, for example) or to display information
 (error and warning messages, for example). | 
| javax.security.auth.kerberos | This package contains utility classes related to the Kerberos network
 authentication protocol. | 
| javax.security.auth.login | This package provides a pluggable authentication framework. | 
| javax.security.auth.x500 | This package contains the classes that should be used to store
 X500 Principal and X500 Private Credentials in a
 Subject. | 
| javax.security.cert | Provides classes for public key certificates. | 
| javax.security.sasl | Contains class and interfaces for supporting SASL. | 
| javax.sound.midi | Provides interfaces and classes for I/O, sequencing, and synthesis of MIDI 
(Musical Instrument Digital Interface) data. | 
| javax.sound.midi.spi | Supplies interfaces for service providers to implement when
offering new MIDI devices, MIDI file readers and writers, or sound bank readers. | 
| javax.sound.sampled | Provides interfaces and classes for capture, processing, and playback of sampled audio data. | 
| javax.sound.sampled.spi | Supplies abstract classes for service providers to subclass when
offering new audio devices, sound file readers and writers, or audio format converters. | 
| javax.sql | Provides the API for server side data source access and processing from
the JavaTM programming language. | 
| javax.sql.rowset | Standard interfaces and base classes for JDBC  RowSetimplementations. | 
| javax.sql.rowset.serial | Provides utility classes to allow serializable mappings between SQL types
and data types in the Java programming language. | 
| javax.sql.rowset.spi | The standard classes and interfaces that a third party vendor has to
use in its implementation of a synchronization provider. | 
| javax.swing | Provides a set of "lightweight"
(all-Java language) components that,
to the maximum degree possible, work the same on all platforms. | 
| javax.swing.border | Provides classes and interface for drawing
specialized borders around a Swing component. | 
| javax.swing.colorchooser | Contains classes and interfaces used by the  JColorChoosercomponent. | 
| javax.swing.event | Provides for events fired by Swing components. | 
| javax.swing.filechooser | Contains classes and interfaces used by the  JFileChoosercomponent. | 
| javax.swing.plaf | Provides one interface and many abstract classes that
Swing uses to provide its pluggable look-and-feel capabilities. | 
| javax.swing.plaf.basic | Provides user interface objects built according to the
Basic look and feel. | 
| javax.swing.plaf.metal | Provides user interface objects built according to
the Java look and feel (once codenamed Metal),
which is the default look and feel. | 
| javax.swing.plaf.multi | Provides user interface objects that combine two or more look and feels. | 
| javax.swing.plaf.nimbus | Provides user interface objects built according to the cross-platform
Nimbus look and feel. | 
| javax.swing.plaf.synth | 
      Synth is a skinnable look and feel in which all painting is
      delegated. | 
| javax.swing.table | Provides classes and interfaces for dealing with
 javax.swing.JTable. | 
| javax.swing.text | Provides classes and interfaces that deal with editable
and noneditable text components. | 
| javax.swing.text.html | Provides the class  HTMLEditorKitand supporting classes
for creating HTML text editors. | 
| javax.swing.text.html.parser | Provides the default HTML parser, along with support classes. | 
| javax.swing.text.rtf | Provides a class ( RTFEditorKit) for creating Rich-Text-Format
text editors. | 
| javax.swing.tree | Provides classes and interfaces for dealing with
 javax.swing.JTree. | 
| javax.swing.undo | Allows developers to provide support for undo/redo
in applications such as text editors. | 
| javax.tools | Provides interfaces for tools which can be invoked from a program,
 for example, compilers. | 
| javax.transaction | Contains three exceptions thrown by the ORB machinery during unmarshalling. | 
| javax.transaction.xa | Provides the API that defines the contract between the transaction 
manager and the resource manager, which allows the transaction 
manager to enlist and delist resource objects (supplied by the 
resource manager driver) in JTA transactions. | 
| javax.xml.bind | 
        Provides a runtime binding framework for client applications including
        unmarshalling, marshalling, and validation capabilities. | 
| javax.xml.bind.annotation | 
        Defines annotations for customizing Java program elements to XML Schema mapping. | 
| javax.xml.bind.helpers | 
        JAXB Provider Use Only: Provides partial default implementations for 
        some of the javax.xml.bind interfaces. | 
| javax.xml.crypto | Common classes for XML cryptography. | 
| javax.xml.crypto.dsig | Classes for generating and validating XML digital
signatures. | 
| javax.xml.datatype | XML/Java Type Mappings. | 
| javax.xml.namespace | XML Namespace processing. | 
| javax.xml.parsers | 
                Provides classes allowing the processing of XML documents. | 
| javax.xml.soap | Provides the API for creating and building SOAP messages. | 
| javax.xml.stream | |
| javax.xml.stream.events | |
| javax.xml.transform | This package defines the generic APIs for processing transformation
instructions, and performing a transformation from source to result. | 
| javax.xml.transform.stream | This package implements stream- and URI- specific transformation APIs. | 
| javax.xml.validation | 
                    This package provides an API for validation of XML documents. | 
| javax.xml.ws | This package contains the core JAX-WS APIs. | 
| javax.xml.ws.handler | This package defines APIs for message handlers. | 
| javax.xml.ws.http | This package defines APIs specific to the HTTP binding. | 
| javax.xml.ws.soap | This package defines APIs specific to the SOAP binding. | 
| javax.xml.ws.spi.http | Provides HTTP SPI that is used for portable deployment of JAX-WS
  web services in containers(for e.g. | 
| javax.xml.xpath | This package provides an object-model neutral API for the
evaluation of XPath expressions and access to the evaluation
environment. | 
| org.ietf.jgss | This package presents a framework that allows application developers to
    make use of security services like authentication, data integrity and
    data confidentiality from a variety of underlying security mechanisms
    like Kerberos, using a unified API. | 
| org.omg.CORBA | Provides the mapping of the OMG CORBA APIs to the JavaTM
programming language, including the class ORB, which is implemented
so that a programmer can use it as a fully-functional Object Request Broker
(ORB). | 
| org.omg.CORBA.DynAnyPackage | Provides the exceptions used with the  DynAnyinterface 
(InvalidValue,Invalid,InvalidSeq, andTypeMismatch). | 
| org.omg.CORBA.ORBPackage | Provides the exception  InvalidName, which is thrown
by the methodORB.resolve_initial_referencesand the exceptionInconsistentTypeCode, which is thrown
by the Dynamic Any creation methods in the ORB class. | 
| org.omg.CORBA.TypeCodePackage | Provides the user-defined exceptions  BadKindandBounds, which are thrown by methods in
in the classTypeCode. | 
| org.omg.CORBA.portable | Provides a portability layer, that is, a set of ORB APIs
that makes it possible for code generated
by one vendor to run on another vendor's ORB. | 
| org.omg.CORBA_2_3.portable | Provides methods for the input and output of value types, and contains 
 other updates to the  org/omg/CORBA/portablepackage. | 
| org.omg.CosNaming | Provides a naming service for Java IDL. | 
| org.omg.CosNaming.NamingContextExtPackage | This package contains the following classes, which are used in 
org.omg.CosNaming.NamingContextExt: | 
| org.omg.CosNaming.NamingContextPackage | This package contains Exception classes for the org.omg.CosNaming
 package. | 
| org.omg.Dynamic | This package contains the Dynamic module specified in the OMG Portable
Interceptor specification,
http://cgi.omg.org/cgi-bin/doc?ptc/2000-08-06, section 21.9. | 
| org.omg.DynamicAny | Provides classes and interfaces that enable traversal of the data value
 associated with an  anyat
runtime, and extraction of the primitive constituents of the data value. | 
| org.omg.IOP | This package contains the IOP module specified in the OMG document
The Common
Object Request Broker: Architecture and Specification,
http://cgi.omg.org/cgi-bin/doc?formal/99-10-07, section 13.6. | 
| org.omg.IOP.CodecFactoryPackage | This package contains the exceptions
specified in the IOP::CodeFactory interface (as part of the Portable
 Interceptors spec). | 
| org.omg.IOP.CodecPackage | This package is generated from the IOP::Codec IDL interface
definition. | 
| org.omg.PortableInterceptor | Provides a mechanism to register ORB hooks through which ORB services
can intercept the normal flow of execution of the ORB. | 
| org.omg.PortableInterceptor.ORBInitInfoPackage | This package contains the exceptions and typedefs from the ORBInitInfo
local interface of the PortableInterceptor module specified in the OMG
Portable Interceptor specification,
http://cgi.omg.org/cgi-bin/doc?ptc/2000-08-06, section 21.7.2. | 
| org.omg.PortableServer | Provides classes and interfaces for making the server side of your applications 
portable across multivendor ORBs. | 
| org.omg.PortableServer.CurrentPackage |  Provides method implementations with 
 access to the identity of the object on which the 
 method was invoked. | 
| org.omg.PortableServer.POAManagerPackage | 
Encapsulates the processing 
 state of the POAs it is associated with. | 
| org.omg.PortableServer.POAPackage | Allows programmers to construct object implementations that are portable
between different ORB products. | 
| org.omg.SendingContext | Provides support for the  marshalling of value types. | 
| org.omg.stub.java.rmi | Contains RMI-IIOP Stubs for the Remote types that occur in the 
  java.rmi package. | 
| org.w3c.dom | Provides the interfaces for the Document Object Model (DOM). | 
| org.w3c.dom.events | |
| org.w3c.dom.ls | |
| org.xml.sax |  This package provides the core SAX APIs. | 
| org.xml.sax.ext | 
This package contains interfaces to SAX2 facilities that
conformant SAX drivers won't necessarily support. | 
| org.xml.sax.helpers | This package contains "helper" classes, including
support for bootstrapping SAX-based applications. | 
| Class and Description | 
|---|
| InputStream This abstract class is the superclass of all classes representing
 an input stream of bytes. | 
| IOException Signals that an I/O exception of some sort has occurred. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| File An abstract representation of file and directory pathnames. | 
| FilenameFilter Instances of classes that implement this interface are used to
 filter filenames. | 
| InputStream This abstract class is the superclass of all classes representing
 an input stream of bytes. | 
| IOException Signals that an I/O exception of some sort has occurred. | 
| ObjectOutputStream An ObjectOutputStream writes primitive data types and graphs of Java objects
 to an OutputStream. | 
| ObjectStreamException Superclass of all exceptions specific to Object Stream classes. | 
| PrintStream A  PrintStreamadds functionality to another output stream,
 namely the ability to print representations of various data values
 conveniently. | 
| PrintWriter Prints formatted representations of objects to a text-output stream. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| InputStream This abstract class is the superclass of all classes representing
 an input stream of bytes. | 
| IOException Signals that an I/O exception of some sort has occurred. | 
| ObjectStreamException Superclass of all exceptions specific to Object Stream classes. | 
| OutputStream This abstract class is the superclass of all classes representing
 an output stream of bytes. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Externalizable Only the identity of the class of an Externalizable instance is
 written in the serialization stream and it is the responsibility
 of the class to save and restore the contents of its instances. | 
| IOException Signals that an I/O exception of some sort has occurred. | 
| ObjectInput ObjectInput extends the DataInput interface to include the reading of
 objects. | 
| ObjectOutput ObjectOutput extends the DataOutput interface to include writing of objects. | 
| Reader Abstract class for reading character streams. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| IOException Signals that an I/O exception of some sort has occurred. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| InvalidObjectException Indicates that one or more deserialized objects failed validation
 tests. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| IOException Signals that an I/O exception of some sort has occurred. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| InputStream This abstract class is the superclass of all classes representing
 an input stream of bytes. | 
| IOException Signals that an I/O exception of some sort has occurred. | 
| OutputStream This abstract class is the superclass of all classes representing
 an output stream of bytes. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| InputStream This abstract class is the superclass of all classes representing
 an input stream of bytes. | 
| IOException Signals that an I/O exception of some sort has occurred. | 
| ObjectInputStream An ObjectInputStream deserializes primitive data and objects previously
 written using an ObjectOutputStream. | 
| ObjectOutputStream An ObjectOutputStream writes primitive data types and graphs of Java objects
 to an OutputStream. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| BufferedReader Reads text from a character-input stream, buffering characters so as to
 provide for the efficient reading of characters, arrays, and lines. | 
| CharArrayWriter This class implements a character buffer that can be used as an Writer. | 
| Closeable A  Closeableis a source or destination of data that can be closed. | 
| Console Methods to access the character-based console device, if any, associated
 with the current Java virtual machine. | 
| DataInput The  DataInputinterface provides
 for reading bytes from a binary stream and
 reconstructing from them data in any of
 the Java primitive types. | 
| DataOutput The  DataOutputinterface provides
 for converting data from any of the Java
 primitive types to a series of bytes and
 writing these bytes to a binary stream. | 
| File An abstract representation of file and directory pathnames. | 
| FileDescriptor Instances of the file descriptor class serve as an opaque handle
 to the underlying machine-specific structure representing an open
 file, an open socket, or another source or sink of bytes. | 
| FileFilter A filter for abstract pathnames. | 
| FilenameFilter Instances of classes that implement this interface are used to
 filter filenames. | 
| FileNotFoundException Signals that an attempt to open the file denoted by a specified pathname
 has failed. | 
| FilterInputStream A  FilterInputStreamcontains
 some other input stream, which it uses as
 its  basic source of data, possibly transforming
 the data along the way or providing  additional
 functionality. | 
| FilterOutputStream This class is the superclass of all classes that filter output
 streams. | 
| FilterReader Abstract class for reading filtered character streams. | 
| Flushable A Flushable is a destination of data that can be flushed. | 
| InputStream This abstract class is the superclass of all classes representing
 an input stream of bytes. | 
| InputStreamReader An InputStreamReader is a bridge from byte streams to character streams: It
 reads bytes and decodes them into characters using a specified  charset. | 
| InvalidObjectException Indicates that one or more deserialized objects failed validation
 tests. | 
| IOException Signals that an I/O exception of some sort has occurred. | 
| NotActiveException Thrown when serialization or deserialization is not active. | 
| ObjectInput ObjectInput extends the DataInput interface to include the reading of
 objects. | 
| ObjectInputStream.GetField Provide access to the persistent fields read from the input stream. | 
| ObjectInputValidation Callback interface to allow validation of objects within a graph. | 
| ObjectOutput ObjectOutput extends the DataOutput interface to include writing of objects. | 
| ObjectOutputStream.PutField Provide programmatic access to the persistent fields to be written
 to ObjectOutput. | 
| ObjectStreamClass Serialization's descriptor for classes. | 
| ObjectStreamConstants Constants written into the Object Serialization Stream. | 
| ObjectStreamException Superclass of all exceptions specific to Object Stream classes. | 
| ObjectStreamField A description of a Serializable field from a Serializable class. | 
| OutputStream This abstract class is the superclass of all classes representing
 an output stream of bytes. | 
| OutputStreamWriter An OutputStreamWriter is a bridge from character streams to byte streams:
 Characters written to it are encoded into bytes using a specified  charset. | 
| PipedInputStream A piped input stream should be connected
 to a piped output stream; the piped  input
 stream then provides whatever data bytes
 are written to the piped output  stream. | 
| PipedOutputStream A piped output stream can be connected to a piped input stream
 to create a communications pipe. | 
| PipedReader Piped character-input streams. | 
| PipedWriter Piped character-output streams. | 
| PrintStream A  PrintStreamadds functionality to another output stream,
 namely the ability to print representations of various data values
 conveniently. | 
| PrintWriter Prints formatted representations of objects to a text-output stream. | 
| Reader Abstract class for reading character streams. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| SerializablePermission This class is for Serializable permissions. | 
| StreamCorruptedException Thrown when control information that was read from an object stream
 violates internal consistency checks. | 
| StringWriter A character stream that collects its output in a string buffer, which can
 then be used to construct a string. | 
| SyncFailedException Signals that a sync operation has failed. | 
| UnsupportedEncodingException The Character Encoding is not supported. | 
| Writer Abstract class for writing to character streams. | 
| Class and Description | 
|---|
| Console Methods to access the character-based console device, if any, associated
 with the current Java virtual machine. | 
| File An abstract representation of file and directory pathnames. | 
| FileDescriptor Instances of the file descriptor class serve as an opaque handle
 to the underlying machine-specific structure representing an open
 file, an open socket, or another source or sink of bytes. | 
| InputStream This abstract class is the superclass of all classes representing
 an input stream of bytes. | 
| IOException Signals that an I/O exception of some sort has occurred. | 
| OutputStream This abstract class is the superclass of all classes representing
 an output stream of bytes. | 
| PrintStream A  PrintStreamadds functionality to another output stream,
 namely the ability to print representations of various data values
 conveniently. | 
| PrintWriter Prints formatted representations of objects to a text-output stream. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| UnsupportedEncodingException The Character Encoding is not supported. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| IOException Signals that an I/O exception of some sort has occurred. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Closeable A  Closeableis a source or destination of data that can be closed. | 
| FileDescriptor Instances of the file descriptor class serve as an opaque handle
 to the underlying machine-specific structure representing an open
 file, an open socket, or another source or sink of bytes. | 
| InputStream This abstract class is the superclass of all classes representing
 an input stream of bytes. | 
| InterruptedIOException Signals that an I/O operation has been interrupted. | 
| IOException Signals that an I/O exception of some sort has occurred. | 
| OutputStream This abstract class is the superclass of all classes representing
 an output stream of bytes. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| UnsupportedEncodingException The Character Encoding is not supported. | 
| Class and Description | 
|---|
| IOException Signals that an I/O exception of some sort has occurred. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Closeable A  Closeableis a source or destination of data that can be closed. | 
| InputStream This abstract class is the superclass of all classes representing
 an input stream of bytes. | 
| IOException Signals that an I/O exception of some sort has occurred. | 
| OutputStream This abstract class is the superclass of all classes representing
 an output stream of bytes. | 
| Reader Abstract class for reading character streams. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Writer Abstract class for writing to character streams. | 
| Class and Description | 
|---|
| Closeable A  Closeableis a source or destination of data that can be closed. | 
| IOException Signals that an I/O exception of some sort has occurred. | 
| Class and Description | 
|---|
| IOException Signals that an I/O exception of some sort has occurred. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| BufferedReader Reads text from a character-input stream, buffering characters so as to
 provide for the efficient reading of characters, arrays, and lines. | 
| BufferedWriter Writes text to a character-output stream, buffering characters so as to
 provide for the efficient writing of single characters, arrays, and strings. | 
| Closeable A  Closeableis a source or destination of data that can be closed. | 
| File An abstract representation of file and directory pathnames. | 
| InputStream This abstract class is the superclass of all classes representing
 an input stream of bytes. | 
| IOException Signals that an I/O exception of some sort has occurred. | 
| OutputStream This abstract class is the superclass of all classes representing
 an output stream of bytes. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| IOException Signals that an I/O exception of some sort has occurred. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| InputStream This abstract class is the superclass of all classes representing
 an input stream of bytes. | 
| IOException Signals that an I/O exception of some sort has occurred. | 
| OutputStream This abstract class is the superclass of all classes representing
 an output stream of bytes. | 
| Class and Description | 
|---|
| IOException Signals that an I/O exception of some sort has occurred. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| IOException Signals that an I/O exception of some sort has occurred. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Closeable A  Closeableis a source or destination of data that can be closed. | 
| DataInput The  DataInputinterface provides
 for reading bytes from a binary stream and
 reconstructing from them data in any of
 the Java primitive types. | 
| DataOutput The  DataOutputinterface provides
 for converting data from any of the Java
 primitive types to a series of bytes and
 writing these bytes to a binary stream. | 
| Externalizable Only the identity of the class of an Externalizable instance is
 written in the serialization stream and it is the responsibility
 of the class to save and restore the contents of its instances. | 
| FilterOutputStream This class is the superclass of all classes that filter output
 streams. | 
| Flushable A Flushable is a destination of data that can be flushed. | 
| IOException Signals that an I/O exception of some sort has occurred. | 
| ObjectInput ObjectInput extends the DataInput interface to include the reading of
 objects. | 
| ObjectOutput ObjectOutput extends the DataOutput interface to include writing of objects. | 
| OutputStream This abstract class is the superclass of all classes representing
 an output stream of bytes. | 
| PrintStream A  PrintStreamadds functionality to another output stream,
 namely the ability to print representations of various data values
 conveniently. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| StreamCorruptedException Thrown when control information that was read from an object stream
 violates internal consistency checks. | 
| Class and Description | 
|---|
| Closeable A  Closeableis a source or destination of data that can be closed. | 
| File An abstract representation of file and directory pathnames. | 
| FilterInputStream A  FilterInputStreamcontains
 some other input stream, which it uses as
 its  basic source of data, possibly transforming
 the data along the way or providing  additional
 functionality. | 
| FilterOutputStream This class is the superclass of all classes that filter output
 streams. | 
| Flushable A Flushable is a destination of data that can be flushed. | 
| InputStream This abstract class is the superclass of all classes representing
 an input stream of bytes. | 
| IOException Signals that an I/O exception of some sort has occurred. | 
| ObjectStreamException Superclass of all exceptions specific to Object Stream classes. | 
| OutputStream This abstract class is the superclass of all classes representing
 an output stream of bytes. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| InputStream This abstract class is the superclass of all classes representing
 an input stream of bytes. | 
| IOException Signals that an I/O exception of some sort has occurred. | 
| ObjectStreamException Superclass of all exceptions specific to Object Stream classes. | 
| OutputStream This abstract class is the superclass of all classes representing
 an output stream of bytes. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| InputStream This abstract class is the superclass of all classes representing
 an input stream of bytes. | 
| OutputStream This abstract class is the superclass of all classes representing
 an output stream of bytes. | 
| PrintStream A  PrintStreamadds functionality to another output stream,
 namely the ability to print representations of various data values
 conveniently. | 
| PrintWriter Prints formatted representations of objects to a text-output stream. | 
| Reader Abstract class for reading character streams. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Writer Abstract class for writing to character streams. | 
| Class and Description | 
|---|
| InvalidObjectException Indicates that one or more deserialized objects failed validation
 tests. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Closeable A  Closeableis a source or destination of data that can be closed. | 
| File An abstract representation of file and directory pathnames. | 
| FileNotFoundException Signals that an attempt to open the file denoted by a specified pathname
 has failed. | 
| Flushable A Flushable is a destination of data that can be flushed. | 
| InputStream This abstract class is the superclass of all classes representing
 an input stream of bytes. | 
| IOException Signals that an I/O exception of some sort has occurred. | 
| OutputStream This abstract class is the superclass of all classes representing
 an output stream of bytes. | 
| PrintStream A  PrintStreamadds functionality to another output stream,
 namely the ability to print representations of various data values
 conveniently. | 
| PrintWriter Prints formatted representations of objects to a text-output stream. | 
| Reader Abstract class for reading character streams. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| UnsupportedEncodingException The Character Encoding is not supported. | 
| Writer Abstract class for writing to character streams. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Closeable A  Closeableis a source or destination of data that can be closed. | 
| File An abstract representation of file and directory pathnames. | 
| FilterInputStream A  FilterInputStreamcontains
 some other input stream, which it uses as
 its  basic source of data, possibly transforming
 the data along the way or providing  additional
 functionality. | 
| FilterOutputStream This class is the superclass of all classes that filter output
 streams. | 
| Flushable A Flushable is a destination of data that can be flushed. | 
| InputStream This abstract class is the superclass of all classes representing
 an input stream of bytes. | 
| IOException Signals that an I/O exception of some sort has occurred. | 
| OutputStream This abstract class is the superclass of all classes representing
 an output stream of bytes. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| InputStream This abstract class is the superclass of all classes representing
 an input stream of bytes. | 
| IOException Signals that an I/O exception of some sort has occurred. | 
| OutputStream This abstract class is the superclass of all classes representing
 an output stream of bytes. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| UnsupportedEncodingException The Character Encoding is not supported. | 
| Class and Description | 
|---|
| InputStream This abstract class is the superclass of all classes representing
 an input stream of bytes. | 
| IOException Signals that an I/O exception of some sort has occurred. | 
| OutputStream This abstract class is the superclass of all classes representing
 an output stream of bytes. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Closeable A  Closeableis a source or destination of data that can be closed. | 
| File An abstract representation of file and directory pathnames. | 
| FilterInputStream A  FilterInputStreamcontains
 some other input stream, which it uses as
 its  basic source of data, possibly transforming
 the data along the way or providing  additional
 functionality. | 
| FilterOutputStream This class is the superclass of all classes that filter output
 streams. | 
| Flushable A Flushable is a destination of data that can be flushed. | 
| InputStream This abstract class is the superclass of all classes representing
 an input stream of bytes. | 
| IOException Signals that an I/O exception of some sort has occurred. | 
| OutputStream This abstract class is the superclass of all classes representing
 an output stream of bytes. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| InputStream This abstract class is the superclass of all classes representing
 an input stream of bytes. | 
| Class and Description | 
|---|
| Externalizable Only the identity of the class of an Externalizable instance is
 written in the serialization stream and it is the responsibility
 of the class to save and restore the contents of its instances. | 
| File An abstract representation of file and directory pathnames. | 
| InputStream This abstract class is the superclass of all classes representing
 an input stream of bytes. | 
| IOException Signals that an I/O exception of some sort has occurred. | 
| ObjectInput ObjectInput extends the DataInput interface to include the reading of
 objects. | 
| ObjectOutput ObjectOutput extends the DataOutput interface to include writing of objects. | 
| OutputStream This abstract class is the superclass of all classes representing
 an output stream of bytes. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| IOException Signals that an I/O exception of some sort has occurred. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| IOException Signals that an I/O exception of some sort has occurred. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Closeable A  Closeableis a source or destination of data that can be closed. | 
| FilterInputStream A  FilterInputStreamcontains
 some other input stream, which it uses as
 its  basic source of data, possibly transforming
 the data along the way or providing  additional
 functionality. | 
| FilterOutputStream This class is the superclass of all classes that filter output
 streams. | 
| Flushable A Flushable is a destination of data that can be flushed. | 
| InputStream This abstract class is the superclass of all classes representing
 an input stream of bytes. | 
| IOException Signals that an I/O exception of some sort has occurred. | 
| OutputStream This abstract class is the superclass of all classes representing
 an output stream of bytes. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| File An abstract representation of file and directory pathnames. | 
| InputStream This abstract class is the superclass of all classes representing
 an input stream of bytes. | 
| IOException Signals that an I/O exception of some sort has occurred. | 
| OutputStream This abstract class is the superclass of all classes representing
 an output stream of bytes. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| IOException Signals that an I/O exception of some sort has occurred. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| File An abstract representation of file and directory pathnames. | 
| IOException Signals that an I/O exception of some sort has occurred. | 
| Class and Description | 
|---|
| Closeable A  Closeableis a source or destination of data that can be closed. | 
| DataInput The  DataInputinterface provides
 for reading bytes from a binary stream and
 reconstructing from them data in any of
 the Java primitive types. | 
| DataOutput The  DataOutputinterface provides
 for converting data from any of the Java
 primitive types to a series of bytes and
 writing these bytes to a binary stream. | 
| File An abstract representation of file and directory pathnames. | 
| FileNotFoundException Signals that an attempt to open the file denoted by a specified pathname
 has failed. | 
| InputStream This abstract class is the superclass of all classes representing
 an input stream of bytes. | 
| IOException Signals that an I/O exception of some sort has occurred. | 
| OutputStream This abstract class is the superclass of all classes representing
 an output stream of bytes. | 
| RandomAccessFile Instances of this class support both reading and writing to a
 random access file. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Writer Abstract class for writing to character streams. | 
| Class and Description | 
|---|
| IOException Signals that an I/O exception of some sort has occurred. | 
| ObjectInputStream An ObjectInputStream deserializes primitive data and objects previously
 written using an ObjectOutputStream. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Closeable A  Closeableis a source or destination of data that can be closed. | 
| Externalizable Only the identity of the class of an Externalizable instance is
 written in the serialization stream and it is the responsibility
 of the class to save and restore the contents of its instances. | 
| InputStream This abstract class is the superclass of all classes representing
 an input stream of bytes. | 
| IOException Signals that an I/O exception of some sort has occurred. | 
| ObjectInput ObjectInput extends the DataInput interface to include the reading of
 objects. | 
| ObjectOutput ObjectOutput extends the DataOutput interface to include writing of objects. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| ObjectStreamException Superclass of all exceptions specific to Object Stream classes. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Closeable A  Closeableis a source or destination of data that can be closed. | 
| IOException Signals that an I/O exception of some sort has occurred. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Closeable A  Closeableis a source or destination of data that can be closed. | 
| IOException Signals that an I/O exception of some sort has occurred. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| IOException Signals that an I/O exception of some sort has occurred. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| IOException Signals that an I/O exception of some sort has occurred. | 
| Class and Description | 
|---|
| Closeable A  Closeableis a source or destination of data that can be closed. | 
| InputStream This abstract class is the superclass of all classes representing
 an input stream of bytes. | 
| IOException Signals that an I/O exception of some sort has occurred. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| InputStream This abstract class is the superclass of all classes representing
 an input stream of bytes. | 
| IOException Signals that an I/O exception of some sort has occurred. | 
| OutputStream This abstract class is the superclass of all classes representing
 an output stream of bytes. | 
| Reader Abstract class for reading character streams. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| ObjectStreamException Superclass of all exceptions specific to Object Stream classes. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| IOException Signals that an I/O exception of some sort has occurred. | 
| ObjectInputStream An ObjectInputStream deserializes primitive data and objects previously
 written using an ObjectOutputStream. | 
| ObjectOutputStream An ObjectOutputStream writes primitive data types and graphs of Java objects
 to an OutputStream. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| IOException Signals that an I/O exception of some sort has occurred. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Reader Abstract class for reading character streams. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Writer Abstract class for writing to character streams. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| IOException Signals that an I/O exception of some sort has occurred. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| File An abstract representation of file and directory pathnames. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| InputStream This abstract class is the superclass of all classes representing
 an input stream of bytes. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| InputStream This abstract class is the superclass of all classes representing
 an input stream of bytes. | 
| Class and Description | 
|---|
| IOException Signals that an I/O exception of some sort has occurred. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| File An abstract representation of file and directory pathnames. | 
| InputStream This abstract class is the superclass of all classes representing
 an input stream of bytes. | 
| IOException Signals that an I/O exception of some sort has occurred. | 
| OutputStream This abstract class is the superclass of all classes representing
 an output stream of bytes. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| File An abstract representation of file and directory pathnames. | 
| InputStream This abstract class is the superclass of all classes representing
 an input stream of bytes. | 
| IOException Signals that an I/O exception of some sort has occurred. | 
| OutputStream This abstract class is the superclass of all classes representing
 an output stream of bytes. | 
| Class and Description | 
|---|
| Closeable A  Closeableis a source or destination of data that can be closed. | 
| File An abstract representation of file and directory pathnames. | 
| InputStream This abstract class is the superclass of all classes representing
 an input stream of bytes. | 
| IOException Signals that an I/O exception of some sort has occurred. | 
| OutputStream This abstract class is the superclass of all classes representing
 an output stream of bytes. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| File An abstract representation of file and directory pathnames. | 
| InputStream This abstract class is the superclass of all classes representing
 an input stream of bytes. | 
| IOException Signals that an I/O exception of some sort has occurred. | 
| OutputStream This abstract class is the superclass of all classes representing
 an output stream of bytes. | 
| Class and Description | 
|---|
| InputStream This abstract class is the superclass of all classes representing
 an input stream of bytes. | 
| PrintWriter Prints formatted representations of objects to a text-output stream. | 
| Reader Abstract class for reading character streams. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| InputStream This abstract class is the superclass of all classes representing
 an input stream of bytes. | 
| IOException Signals that an I/O exception of some sort has occurred. | 
| OutputStream This abstract class is the superclass of all classes representing
 an output stream of bytes. | 
| Reader Abstract class for reading character streams. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Writer Abstract class for writing to character streams. | 
| Class and Description | 
|---|
| InputStream This abstract class is the superclass of all classes representing
 an input stream of bytes. | 
| OutputStream This abstract class is the superclass of all classes representing
 an output stream of bytes. | 
| Reader Abstract class for reading character streams. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Writer Abstract class for writing to character streams. | 
| Class and Description | 
|---|
| Reader Abstract class for reading character streams. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Writer Abstract class for writing to character streams. | 
| Class and Description | 
|---|
| Closeable A  Closeableis a source or destination of data that can be closed. | 
| File An abstract representation of file and directory pathnames. | 
| FilterInputStream A  FilterInputStreamcontains
 some other input stream, which it uses as
 its  basic source of data, possibly transforming
 the data along the way or providing  additional
 functionality. | 
| InputStream This abstract class is the superclass of all classes representing
 an input stream of bytes. | 
| IOException Signals that an I/O exception of some sort has occurred. | 
| PrintStream A  PrintStreamadds functionality to another output stream,
 namely the ability to print representations of various data values
 conveniently. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| File An abstract representation of file and directory pathnames. | 
| IOException Signals that an I/O exception of some sort has occurred. | 
| Class and Description | 
|---|
| File An abstract representation of file and directory pathnames. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| File An abstract representation of file and directory pathnames. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| File An abstract representation of file and directory pathnames. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| File An abstract representation of file and directory pathnames. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| InputStream This abstract class is the superclass of all classes representing
 an input stream of bytes. | 
| IOException Signals that an I/O exception of some sort has occurred. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| InputStream This abstract class is the superclass of all classes representing
 an input stream of bytes. | 
| IOException Signals that an I/O exception of some sort has occurred. | 
| ObjectInputStream An ObjectInputStream deserializes primitive data and objects previously
 written using an ObjectOutputStream. | 
| ObjectOutputStream An ObjectOutputStream writes primitive data types and graphs of Java objects
 to an OutputStream. | 
| OutputStream This abstract class is the superclass of all classes representing
 an output stream of bytes. | 
| PrintStream A  PrintStreamadds functionality to another output stream,
 namely the ability to print representations of various data values
 conveniently. | 
| Reader Abstract class for reading character streams. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Writer Abstract class for writing to character streams. | 
| Class and Description | 
|---|
| IOException Signals that an I/O exception of some sort has occurred. | 
| Reader Abstract class for reading character streams. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Writer Abstract class for writing to character streams. | 
| Class and Description | 
|---|
| DataInputStream A data input stream lets an application read primitive Java data
 types from an underlying input stream in a machine-independent
 way. | 
| IOException Signals that an I/O exception of some sort has occurred. | 
| Reader Abstract class for reading character streams. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| InputStream This abstract class is the superclass of all classes representing
 an input stream of bytes. | 
| IOException Signals that an I/O exception of some sort has occurred. | 
| OutputStream This abstract class is the superclass of all classes representing
 an output stream of bytes. | 
| Reader Abstract class for reading character streams. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Writer Abstract class for writing to character streams. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Closeable A  Closeableis a source or destination of data that can be closed. | 
| File An abstract representation of file and directory pathnames. | 
| Flushable A Flushable is a destination of data that can be flushed. | 
| InputStream This abstract class is the superclass of all classes representing
 an input stream of bytes. | 
| IOException Signals that an I/O exception of some sort has occurred. | 
| OutputStream This abstract class is the superclass of all classes representing
 an output stream of bytes. | 
| Reader Abstract class for reading character streams. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Writer Abstract class for writing to character streams. | 
| Class and Description | 
|---|
| IOException Signals that an I/O exception of some sort has occurred. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| File An abstract representation of file and directory pathnames. | 
| InputStream This abstract class is the superclass of all classes representing
 an input stream of bytes. | 
| IOException Signals that an I/O exception of some sort has occurred. | 
| OutputStream This abstract class is the superclass of all classes representing
 an output stream of bytes. | 
| PrintStream A  PrintStreamadds functionality to another output stream,
 namely the ability to print representations of various data values
 conveniently. | 
| PrintWriter Prints formatted representations of objects to a text-output stream. | 
| Reader Abstract class for reading character streams. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Writer Abstract class for writing to character streams. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| File An abstract representation of file and directory pathnames. | 
| InputStream This abstract class is the superclass of all classes representing
 an input stream of bytes. | 
| OutputStream This abstract class is the superclass of all classes representing
 an output stream of bytes. | 
| Reader Abstract class for reading character streams. | 
| UnsupportedEncodingException The Character Encoding is not supported. | 
| Writer Abstract class for writing to character streams. | 
| Class and Description | 
|---|
| InputStream This abstract class is the superclass of all classes representing
 an input stream of bytes. | 
| PrintStream A  PrintStreamadds functionality to another output stream,
 namely the ability to print representations of various data values
 conveniently. | 
| PrintWriter Prints formatted representations of objects to a text-output stream. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| InputStream This abstract class is the superclass of all classes representing
 an input stream of bytes. | 
| OutputStream This abstract class is the superclass of all classes representing
 an output stream of bytes. | 
| PrintStream A  PrintStreamadds functionality to another output stream,
 namely the ability to print representations of various data values
 conveniently. | 
| PrintWriter Prints formatted representations of objects to a text-output stream. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| File An abstract representation of file and directory pathnames. | 
| InputStream This abstract class is the superclass of all classes representing
 an input stream of bytes. | 
| IOException Signals that an I/O exception of some sort has occurred. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| InputStream This abstract class is the superclass of all classes representing
 an input stream of bytes. | 
| IOException Signals that an I/O exception of some sort has occurred. | 
| OutputStream This abstract class is the superclass of all classes representing
 an output stream of bytes. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| InputStream This abstract class is the superclass of all classes representing
 an input stream of bytes. | 
| OutputStream This abstract class is the superclass of all classes representing
 an output stream of bytes. | 
| Reader Abstract class for reading character streams. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Writer Abstract class for writing to character streams. | 
| Class and Description | 
|---|
| Writer Abstract class for writing to character streams. | 
| Class and Description | 
|---|
| PrintStream A  PrintStreamadds functionality to another output stream,
 namely the ability to print representations of various data values
 conveniently. | 
| PrintWriter Prints formatted representations of objects to a text-output stream. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| File An abstract representation of file and directory pathnames. | 
| InputStream This abstract class is the superclass of all classes representing
 an input stream of bytes. | 
| OutputStream This abstract class is the superclass of all classes representing
 an output stream of bytes. | 
| Reader Abstract class for reading character streams. | 
| Writer Abstract class for writing to character streams. | 
| Class and Description | 
|---|
| File An abstract representation of file and directory pathnames. | 
| IOException Signals that an I/O exception of some sort has occurred. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| InputStream This abstract class is the superclass of all classes representing
 an input stream of bytes. | 
| IOException Signals that an I/O exception of some sort has occurred. | 
| OutputStream This abstract class is the superclass of all classes representing
 an output stream of bytes. | 
| Class and Description | 
|---|
| PrintStream A  PrintStreamadds functionality to another output stream,
 namely the ability to print representations of various data values
 conveniently. | 
| PrintWriter Prints formatted representations of objects to a text-output stream. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| InputStream This abstract class is the superclass of all classes representing
 an input stream of bytes. | 
| OutputStream This abstract class is the superclass of all classes representing
 an output stream of bytes. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| InputStream This abstract class is the superclass of all classes representing
 an input stream of bytes. | 
| OutputStream This abstract class is the superclass of all classes representing
 an output stream of bytes. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| InputStream This abstract class is the superclass of all classes representing
 an input stream of bytes. | 
| OutputStream This abstract class is the superclass of all classes representing
 an output stream of bytes. | 
| Reader Abstract class for reading character streams. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Writer Abstract class for writing to character streams. | 
| Class and Description | 
|---|
| InputStream This abstract class is the superclass of all classes representing
 an input stream of bytes. | 
| IOException Signals that an I/O exception of some sort has occurred. | 
| Reader Abstract class for reading character streams. | 
| Serializable Serializability of a class is enabled by the class implementing the
 java.io.Serializable interface. | 
| Class and Description | 
|---|
| IOException Signals that an I/O exception of some sort has occurred. | 
| Class and Description | 
|---|
| IOException Signals that an I/O exception of some sort has occurred. | 
 Submit a bug or feature 
For further API reference and developer documentation, see Java SE Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
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