| Package | Description | 
|---|---|
| java.lang | Provides classes that are fundamental to the design of the Java
 programming language. | 
| 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.charset | Defines charsets, decoders, and encoders, for translating between bytes and
Unicode characters. | 
| java.nio.file.attribute | Interfaces and classes providing access to file and file system attributes. | 
| java.security | Provides the classes and interfaces for the security framework. | 
| 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.zip | Provides classes for reading and writing the standard ZIP and GZIP
file formats. | 
| javax.crypto | Provides the classes and interfaces for cryptographic operations. | 
| javax.net.ssl | Provides classes for the secure socket package. | 
| Modifier and Type | Method and Description | 
|---|---|
| protected Class<?> | ClassLoader. defineClass(String name,
           ByteBuffer b,
           ProtectionDomain protectionDomain)Converts a  ByteBufferinto an instance of class Class,
 with an optional ProtectionDomain. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | MappedByteBufferA direct byte buffer whose content is a memory-mapped region of a file. | 
| Modifier and Type | Method and Description | 
|---|---|
| static ByteBuffer | ByteBuffer. allocate(int capacity)Allocates a new byte buffer. | 
| static ByteBuffer | ByteBuffer. allocateDirect(int capacity)Allocates a new direct byte buffer. | 
| abstract ByteBuffer | ByteBuffer. asReadOnlyBuffer()Creates a new, read-only byte buffer that shares this buffer's
 content. | 
| abstract ByteBuffer | ByteBuffer. compact()Compacts this buffer  (optional operation). | 
| abstract ByteBuffer | ByteBuffer. duplicate()Creates a new byte buffer that shares this buffer's content. | 
| ByteBuffer | ByteBuffer. get(byte[] dst)Relative bulk get method. | 
| ByteBuffer | ByteBuffer. get(byte[] dst,
   int offset,
   int length)Relative bulk get method. | 
| ByteBuffer | ByteBuffer. order(ByteOrder bo)Modifies this buffer's byte order. | 
| abstract ByteBuffer | ByteBuffer. put(byte b)Relative put method  (optional operation). | 
| ByteBuffer | ByteBuffer. put(byte[] src)Relative bulk put method  (optional operation). | 
| ByteBuffer | ByteBuffer. put(byte[] src,
   int offset,
   int length)Relative bulk put method  (optional operation). | 
| ByteBuffer | ByteBuffer. put(ByteBuffer src)Relative bulk put method  (optional operation). | 
| abstract ByteBuffer | ByteBuffer. put(int index,
   byte b)Absolute put method  (optional operation). | 
| abstract ByteBuffer | ByteBuffer. putChar(char value)Relative put method for writing a char
 value  (optional operation). | 
| abstract ByteBuffer | ByteBuffer. putChar(int index,
       char value)Absolute put method for writing a char
 value  (optional operation). | 
| abstract ByteBuffer | ByteBuffer. putDouble(double value)Relative put method for writing a double
 value  (optional operation). | 
| abstract ByteBuffer | ByteBuffer. putDouble(int index,
         double value)Absolute put method for writing a double
 value  (optional operation). | 
| abstract ByteBuffer | ByteBuffer. putFloat(float value)Relative put method for writing a float
 value  (optional operation). | 
| abstract ByteBuffer | ByteBuffer. putFloat(int index,
        float value)Absolute put method for writing a float
 value  (optional operation). | 
| abstract ByteBuffer | ByteBuffer. putInt(int value)Relative put method for writing an int
 value  (optional operation). | 
| abstract ByteBuffer | ByteBuffer. putInt(int index,
      int value)Absolute put method for writing an int
 value  (optional operation). | 
| abstract ByteBuffer | ByteBuffer. putLong(int index,
       long value)Absolute put method for writing a long
 value  (optional operation). | 
| abstract ByteBuffer | ByteBuffer. putLong(long value)Relative put method for writing a long
 value  (optional operation). | 
| abstract ByteBuffer | ByteBuffer. putShort(int index,
        short value)Absolute put method for writing a short
 value  (optional operation). | 
| abstract ByteBuffer | ByteBuffer. putShort(short value)Relative put method for writing a short
 value  (optional operation). | 
| abstract ByteBuffer | ByteBuffer. slice()Creates a new byte buffer whose content is a shared subsequence of
 this buffer's content. | 
| static ByteBuffer | ByteBuffer. wrap(byte[] array)Wraps a byte array into a buffer. | 
| static ByteBuffer | ByteBuffer. wrap(byte[] array,
    int offset,
    int length)Wraps a byte array into a buffer. | 
| Modifier and Type | Method and Description | 
|---|---|
| int | ByteBuffer. compareTo(ByteBuffer that)Compares this buffer to another. | 
| ByteBuffer | ByteBuffer. put(ByteBuffer src)Relative bulk put method  (optional operation). | 
| Modifier and Type | Method and Description | 
|---|---|
| Future<Integer> | AsynchronousByteChannel. read(ByteBuffer dst)Reads a sequence of bytes from this channel into the given buffer. | 
| abstract Future<Integer> | AsynchronousSocketChannel. read(ByteBuffer dst) | 
| abstract int | FileChannel. read(ByteBuffer dst)Reads a sequence of bytes from this channel into the given buffer. | 
| int | ReadableByteChannel. read(ByteBuffer dst)Reads a sequence of bytes from this channel into the given buffer. | 
| abstract int | DatagramChannel. read(ByteBuffer dst)Reads a datagram from this channel. | 
| int | SeekableByteChannel. read(ByteBuffer dst)Reads a sequence of bytes from this channel into the given buffer. | 
| abstract int | SocketChannel. read(ByteBuffer dst) | 
| long | ScatteringByteChannel. read(ByteBuffer[] dsts)Reads a sequence of bytes from this channel into the given buffers. | 
| long | FileChannel. read(ByteBuffer[] dsts)Reads a sequence of bytes from this channel into the given buffers. | 
| long | DatagramChannel. read(ByteBuffer[] dsts)Reads a datagram from this channel. | 
| long | SocketChannel. read(ByteBuffer[] dsts) | 
| long | ScatteringByteChannel. read(ByteBuffer[] dsts,
    int offset,
    int length)Reads a sequence of bytes from this channel into a subsequence of the
 given buffers. | 
| abstract long | FileChannel. read(ByteBuffer[] dsts,
    int offset,
    int length)Reads a sequence of bytes from this channel into a subsequence of the
 given buffers. | 
| abstract long | DatagramChannel. read(ByteBuffer[] dsts,
    int offset,
    int length)Reads a datagram from this channel. | 
| abstract long | SocketChannel. read(ByteBuffer[] dsts,
    int offset,
    int length) | 
| abstract <A> void | AsynchronousSocketChannel. read(ByteBuffer[] dsts,
    int offset,
    int length,
    long timeout,
    TimeUnit unit,
    A attachment,
    CompletionHandler<Long,? super A> handler)Reads a sequence of bytes from this channel into a subsequence of the
 given buffers. | 
| <A> void | AsynchronousByteChannel. read(ByteBuffer dst,
    A attachment,
    CompletionHandler<Integer,? super A> handler)Reads a sequence of bytes from this channel into the given buffer. | 
| <A> void | AsynchronousSocketChannel. read(ByteBuffer dst,
    A attachment,
    CompletionHandler<Integer,? super A> handler) | 
| abstract int | FileChannel. read(ByteBuffer dst,
    long position)Reads a sequence of bytes from this channel into the given buffer,
 starting at the given file position. | 
| abstract Future<Integer> | AsynchronousFileChannel. read(ByteBuffer dst,
    long position)Reads a sequence of bytes from this channel into the given buffer,
 starting at the given file position. | 
| abstract <A> void | AsynchronousFileChannel. read(ByteBuffer dst,
    long position,
    A attachment,
    CompletionHandler<Integer,? super A> handler)Reads a sequence of bytes from this channel into the given buffer,
 starting at the given file position. | 
| abstract <A> void | AsynchronousSocketChannel. read(ByteBuffer dst,
    long timeout,
    TimeUnit unit,
    A attachment,
    CompletionHandler<Integer,? super A> handler)Reads a sequence of bytes from this channel into the given buffer. | 
| abstract SocketAddress | DatagramChannel. receive(ByteBuffer dst)Receives a datagram via this channel. | 
| abstract int | DatagramChannel. send(ByteBuffer src,
    SocketAddress target)Sends a datagram via this channel. | 
| Future<Integer> | AsynchronousByteChannel. write(ByteBuffer src)Writes a sequence of bytes to this channel from the given buffer. | 
| abstract Future<Integer> | AsynchronousSocketChannel. write(ByteBuffer src) | 
| int | WritableByteChannel. write(ByteBuffer src)Writes a sequence of bytes to this channel from the given buffer. | 
| abstract int | FileChannel. write(ByteBuffer src)Writes a sequence of bytes to this channel from the given buffer. | 
| abstract int | DatagramChannel. write(ByteBuffer src)Writes a datagram to this channel. | 
| int | SeekableByteChannel. write(ByteBuffer src)Writes a sequence of bytes to this channel from the given buffer. | 
| abstract int | SocketChannel. write(ByteBuffer src) | 
| long | FileChannel. write(ByteBuffer[] srcs)Writes a sequence of bytes to this channel from the given buffers. | 
| long | GatheringByteChannel. write(ByteBuffer[] srcs)Writes a sequence of bytes to this channel from the given buffers. | 
| long | DatagramChannel. write(ByteBuffer[] srcs)Writes a datagram to this channel. | 
| long | SocketChannel. write(ByteBuffer[] srcs) | 
| abstract long | FileChannel. write(ByteBuffer[] srcs,
     int offset,
     int length)Writes a sequence of bytes to this channel from a subsequence of the
 given buffers. | 
| long | GatheringByteChannel. write(ByteBuffer[] srcs,
     int offset,
     int length)Writes a sequence of bytes to this channel from a subsequence of the
 given buffers. | 
| abstract long | DatagramChannel. write(ByteBuffer[] srcs,
     int offset,
     int length)Writes a datagram to this channel. | 
| abstract long | SocketChannel. write(ByteBuffer[] srcs,
     int offset,
     int length) | 
| abstract <A> void | AsynchronousSocketChannel. write(ByteBuffer[] srcs,
     int offset,
     int length,
     long timeout,
     TimeUnit unit,
     A attachment,
     CompletionHandler<Long,? super A> handler)Writes a sequence of bytes to this channel from a subsequence of the given
 buffers. | 
| <A> void | AsynchronousByteChannel. write(ByteBuffer src,
     A attachment,
     CompletionHandler<Integer,? super A> handler)Writes a sequence of bytes to this channel from the given buffer. | 
| <A> void | AsynchronousSocketChannel. write(ByteBuffer src,
     A attachment,
     CompletionHandler<Integer,? super A> handler) | 
| abstract int | FileChannel. write(ByteBuffer src,
     long position)Writes a sequence of bytes to this channel from the given buffer,
 starting at the given file position. | 
| abstract Future<Integer> | AsynchronousFileChannel. write(ByteBuffer src,
     long position)Writes a sequence of bytes to this channel from the given buffer, starting
 at the given file position. | 
| abstract <A> void | AsynchronousFileChannel. write(ByteBuffer src,
     long position,
     A attachment,
     CompletionHandler<Integer,? super A> handler)Writes a sequence of bytes to this channel from the given buffer, starting
 at the given file position. | 
| abstract <A> void | AsynchronousSocketChannel. write(ByteBuffer src,
     long timeout,
     TimeUnit unit,
     A attachment,
     CompletionHandler<Integer,? super A> handler)Writes a sequence of bytes to this channel from the given buffer. | 
| Modifier and Type | Method and Description | 
|---|---|
| ByteBuffer | Charset. encode(CharBuffer cb)Convenience method that encodes Unicode characters into bytes in this
 charset. | 
| ByteBuffer | CharsetEncoder. encode(CharBuffer in)Convenience method that encodes the remaining content of a single input
 character buffer into a newly-allocated byte buffer. | 
| ByteBuffer | Charset. encode(String str)Convenience method that encodes a string into bytes in this charset. | 
| Modifier and Type | Method and Description | 
|---|---|
| CharBuffer | Charset. decode(ByteBuffer bb)Convenience method that decodes bytes in this charset into Unicode
 characters. | 
| CharBuffer | CharsetDecoder. decode(ByteBuffer in)Convenience method that decodes the remaining content of a single input
 byte buffer into a newly-allocated character buffer. | 
| CoderResult | CharsetDecoder. decode(ByteBuffer in,
      CharBuffer out,
      boolean endOfInput)Decodes as many bytes as possible from the given input buffer,
 writing the results to the given output buffer. | 
| protected abstract CoderResult | CharsetDecoder. decodeLoop(ByteBuffer in,
          CharBuffer out)Decodes one or more bytes into one or more characters. | 
| CoderResult | CharsetEncoder. encode(CharBuffer in,
      ByteBuffer out,
      boolean endOfInput)Encodes as many characters as possible from the given input buffer,
 writing the results to the given output buffer. | 
| protected abstract CoderResult | CharsetEncoder. encodeLoop(CharBuffer in,
          ByteBuffer out)Encodes one or more characters into one or more bytes. | 
| CoderResult | CharsetEncoder. flush(ByteBuffer out)Flushes this encoder. | 
| protected CoderResult | CharsetEncoder. implFlush(ByteBuffer out)Flushes this encoder. | 
| Modifier and Type | Method and Description | 
|---|---|
| int | UserDefinedFileAttributeView. read(String name,
    ByteBuffer dst)Read the value of a user-defined attribute into a buffer. | 
| int | UserDefinedFileAttributeView. write(String name,
     ByteBuffer src)Writes the value of a user-defined attribute from a buffer. | 
| Modifier and Type | Method and Description | 
|---|---|
| protected Class<?> | SecureClassLoader. defineClass(String name,
           ByteBuffer b,
           CodeSource cs)Converts a  ByteBufferinto an instance of classClass, with an optional CodeSource. | 
| protected void | MessageDigestSpi. engineUpdate(ByteBuffer input)Update the digest using the specified ByteBuffer. | 
| protected void | SignatureSpi. engineUpdate(ByteBuffer input)Updates the data to be signed or verified using the specified
 ByteBuffer. | 
| void | MessageDigest. update(ByteBuffer input)Update the digest using the specified ByteBuffer. | 
| void | Signature. update(ByteBuffer data)Updates the data to be signed or verified using the specified
 ByteBuffer. | 
| Modifier and Type | Method and Description | 
|---|---|
| ByteBuffer | Base64.Decoder. decode(ByteBuffer buffer)Decodes all bytes from the input byte buffer using the  Base64encoding scheme, writing the results into a newly-allocated ByteBuffer. | 
| ByteBuffer | Base64.Encoder. encode(ByteBuffer buffer)Encodes all remaining bytes from the specified byte buffer into
 a newly-allocated ByteBuffer using the  Base64encoding
 scheme. | 
| Modifier and Type | Method and Description | 
|---|---|
| ByteBuffer | Base64.Decoder. decode(ByteBuffer buffer)Decodes all bytes from the input byte buffer using the  Base64encoding scheme, writing the results into a newly-allocated ByteBuffer. | 
| ByteBuffer | Base64.Encoder. encode(ByteBuffer buffer)Encodes all remaining bytes from the specified byte buffer into
 a newly-allocated ByteBuffer using the  Base64encoding
 scheme. | 
| static BitSet | BitSet. valueOf(ByteBuffer bb)Returns a new bit set containing all the bits in the given byte
 buffer between its position and limit. | 
| Modifier and Type | Method and Description | 
|---|---|
| void | CRC32. update(ByteBuffer buffer)Updates the checksum with the bytes from the specified buffer. | 
| void | Adler32. update(ByteBuffer buffer)Updates the checksum with the bytes from the specified buffer. | 
| Modifier and Type | Method and Description | 
|---|---|
| int | Cipher. doFinal(ByteBuffer input,
       ByteBuffer output)Encrypts or decrypts data in a single-part operation, or finishes a
 multiple-part operation. | 
| protected int | CipherSpi. engineDoFinal(ByteBuffer input,
             ByteBuffer output)Encrypts or decrypts data in a single-part operation,
 or finishes a multiple-part operation. | 
| protected void | MacSpi. engineUpdate(ByteBuffer input)Processes  input.remaining()bytes in the ByteBufferinput, starting atinput.position(). | 
| protected int | CipherSpi. engineUpdate(ByteBuffer input,
            ByteBuffer output)Continues a multiple-part encryption or decryption operation
 (depending on how this cipher was initialized), processing another data
 part. | 
| protected void | CipherSpi. engineUpdateAAD(ByteBuffer src)Continues a multi-part update of the Additional Authentication
 Data (AAD). | 
| void | Mac. update(ByteBuffer input)Processes  input.remaining()bytes in the ByteBufferinput, starting atinput.position(). | 
| int | Cipher. update(ByteBuffer input,
      ByteBuffer output)Continues a multiple-part encryption or decryption operation
 (depending on how this cipher was initialized), processing another data
 part. | 
| void | Cipher. updateAAD(ByteBuffer src)Continues a multi-part update of the Additional Authentication
 Data (AAD). | 
| Modifier and Type | Method and Description | 
|---|---|
| SSLEngineResult | SSLEngine. unwrap(ByteBuffer src,
      ByteBuffer dst)Attempts to decode SSL/TLS network data into a plaintext
 application data buffer. | 
| SSLEngineResult | SSLEngine. unwrap(ByteBuffer src,
      ByteBuffer[] dsts)Attempts to decode SSL/TLS network data into a sequence of plaintext
 application data buffers. | 
| SSLEngineResult | SSLEngine. unwrap(ByteBuffer src,
      ByteBuffer[] dsts)Attempts to decode SSL/TLS network data into a sequence of plaintext
 application data buffers. | 
| abstract SSLEngineResult | SSLEngine. unwrap(ByteBuffer src,
      ByteBuffer[] dsts,
      int offset,
      int length)Attempts to decode SSL/TLS network data into a subsequence of
 plaintext application data buffers. | 
| abstract SSLEngineResult | SSLEngine. unwrap(ByteBuffer src,
      ByteBuffer[] dsts,
      int offset,
      int length)Attempts to decode SSL/TLS network data into a subsequence of
 plaintext application data buffers. | 
| SSLEngineResult | SSLEngine. wrap(ByteBuffer[] srcs,
    ByteBuffer dst)Attempts to encode plaintext bytes from a sequence of data
 buffers into SSL/TLS network data. | 
| SSLEngineResult | SSLEngine. wrap(ByteBuffer[] srcs,
    ByteBuffer dst)Attempts to encode plaintext bytes from a sequence of data
 buffers into SSL/TLS network data. | 
| abstract SSLEngineResult | SSLEngine. wrap(ByteBuffer[] srcs,
    int offset,
    int length,
    ByteBuffer dst)Attempts to encode plaintext bytes from a subsequence of data
 buffers into SSL/TLS network data. | 
| abstract SSLEngineResult | SSLEngine. wrap(ByteBuffer[] srcs,
    int offset,
    int length,
    ByteBuffer dst)Attempts to encode plaintext bytes from a subsequence of data
 buffers into SSL/TLS network data. | 
| SSLEngineResult | SSLEngine. wrap(ByteBuffer src,
    ByteBuffer dst)Attempts to encode a buffer of plaintext application data into
 SSL/TLS network data. | 
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