| Package | Description | 
|---|---|
| java.nio.charset | Defines charsets, decoders, and encoders, for translating between bytes and
Unicode characters. | 
| 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.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. | 
| Modifier and Type | Method and Description | 
|---|---|
| static SortedMap<String,Charset> | Charset. availableCharsets()Constructs a sorted map from canonical charset names to charset objects. | 
| Modifier and Type | Interface and Description | 
|---|---|
| interface  | NavigableMap<K,V>A  SortedMapextended with navigation methods returning the
 closest matches for given search targets. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | TreeMap<K,V>A Red-Black tree based  NavigableMapimplementation. | 
| Modifier and Type | Method and Description | 
|---|---|
| static <K,V> SortedMap<K,V> | Collections. checkedSortedMap(SortedMap<K,V> m,
                Class<K> keyType,
                Class<V> valueType)Returns a dynamically typesafe view of the specified sorted map. | 
| static <K,V> SortedMap<K,V> | Collections. emptySortedMap()Returns an empty sorted map (immutable). | 
| SortedMap<K,V> | TreeMap. headMap(K toKey) | 
| SortedMap<K,V> | NavigableMap. headMap(K toKey)Returns a view of the portion of this map whose keys are
 strictly less than  toKey. | 
| SortedMap<K,V> | SortedMap. headMap(K toKey)Returns a view of the portion of this map whose keys are
 strictly less than  toKey. | 
| SortedMap<K,V> | TreeMap. subMap(K fromKey,
      K toKey) | 
| SortedMap<K,V> | NavigableMap. subMap(K fromKey,
      K toKey)Returns a view of the portion of this map whose keys range from
  fromKey, inclusive, totoKey, exclusive. | 
| SortedMap<K,V> | SortedMap. subMap(K fromKey,
      K toKey)Returns a view of the portion of this map whose keys range from
  fromKey, inclusive, totoKey, exclusive. | 
| static <K,V> SortedMap<K,V> | Collections. synchronizedSortedMap(SortedMap<K,V> m)Returns a synchronized (thread-safe) sorted map backed by the specified
 sorted map. | 
| SortedMap<K,V> | TreeMap. tailMap(K fromKey) | 
| SortedMap<K,V> | NavigableMap. tailMap(K fromKey)Returns a view of the portion of this map whose keys are
 greater than or equal to  fromKey. | 
| SortedMap<K,V> | SortedMap. tailMap(K fromKey)Returns a view of the portion of this map whose keys are
 greater than or equal to  fromKey. | 
| static <K,V> SortedMap<K,V> | Collections. unmodifiableSortedMap(SortedMap<K,? extends V> m)Returns an unmodifiable view of the specified sorted map. | 
| Modifier and Type | Method and Description | 
|---|---|
| static <K,V> SortedMap<K,V> | Collections. checkedSortedMap(SortedMap<K,V> m,
                Class<K> keyType,
                Class<V> valueType)Returns a dynamically typesafe view of the specified sorted map. | 
| static <K,V> SortedMap<K,V> | Collections. synchronizedSortedMap(SortedMap<K,V> m)Returns a synchronized (thread-safe) sorted map backed by the specified
 sorted map. | 
| static <K,V> SortedMap<K,V> | Collections. unmodifiableSortedMap(SortedMap<K,? extends V> m)Returns an unmodifiable view of the specified sorted map. | 
| Constructor and Description | 
|---|
| TreeMap(SortedMap<K,? extends V> m)Constructs a new tree map containing the same mappings and
 using the same ordering as the specified sorted map. | 
| Modifier and Type | Interface and Description | 
|---|---|
| interface  | ConcurrentNavigableMap<K,V>A  ConcurrentMapsupportingNavigableMapoperations,
 and recursively so for its navigable sub-maps. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | ConcurrentSkipListMap<K,V>A scalable concurrent  ConcurrentNavigableMapimplementation. | 
| Constructor and Description | 
|---|
| ConcurrentSkipListMap(SortedMap<K,? extends V> m)Constructs a new map containing the same mappings and using the
 same ordering as the specified sorted map. | 
| Modifier and Type | Method and Description | 
|---|---|
| SortedMap<String,String> | Pack200.Packer. properties()Get the set of this engine's properties. | 
| SortedMap<String,String> | Pack200.Unpacker. properties()Get the set of this engine's properties. | 
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