| Package | Description | 
|---|---|
| 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. 
 | 
| Modifier and Type | Class and Description | 
|---|---|
class  | 
TreeSet<E>
A  
NavigableSet implementation based on a TreeMap. | 
| Modifier and Type | Method and Description | 
|---|---|
static <E> NavigableSet<E> | 
Collections.checkedNavigableSet(NavigableSet<E> s,
                   Class<E> type)
Returns a dynamically typesafe view of the specified navigable set. 
 | 
NavigableSet<K> | 
TreeMap.descendingKeySet()  | 
NavigableSet<K> | 
NavigableMap.descendingKeySet()
Returns a reverse order  
NavigableSet view of the keys contained in this map. | 
NavigableSet<E> | 
TreeSet.descendingSet()  | 
NavigableSet<E> | 
NavigableSet.descendingSet()
Returns a reverse order view of the elements contained in this set. 
 | 
static <E> NavigableSet<E> | 
Collections.emptyNavigableSet()
Returns an empty navigable set (immutable). 
 | 
NavigableSet<E> | 
TreeSet.headSet(E toElement,
       boolean inclusive)  | 
NavigableSet<E> | 
NavigableSet.headSet(E toElement,
       boolean inclusive)
Returns a view of the portion of this set whose elements are less than
 (or equal to, if  
inclusive is true) toElement. | 
NavigableSet<K> | 
TreeMap.navigableKeySet()  | 
NavigableSet<K> | 
NavigableMap.navigableKeySet()
Returns a  
NavigableSet view of the keys contained in this map. | 
NavigableSet<E> | 
TreeSet.subSet(E fromElement,
      boolean fromInclusive,
      E toElement,
      boolean toInclusive)  | 
NavigableSet<E> | 
NavigableSet.subSet(E fromElement,
      boolean fromInclusive,
      E toElement,
      boolean toInclusive)
Returns a view of the portion of this set whose elements range from
  
fromElement to toElement. | 
static <T> NavigableSet<T> | 
Collections.synchronizedNavigableSet(NavigableSet<T> s)
Returns a synchronized (thread-safe) navigable set backed by the
 specified navigable set. 
 | 
NavigableSet<E> | 
TreeSet.tailSet(E fromElement,
       boolean inclusive)  | 
NavigableSet<E> | 
NavigableSet.tailSet(E fromElement,
       boolean inclusive)
Returns a view of the portion of this set whose elements are greater
 than (or equal to, if  
inclusive is true) fromElement. | 
static <T> NavigableSet<T> | 
Collections.unmodifiableNavigableSet(NavigableSet<T> s)
Returns an unmodifiable view of the specified navigable set. 
 | 
| Modifier and Type | Method and Description | 
|---|---|
static <E> NavigableSet<E> | 
Collections.checkedNavigableSet(NavigableSet<E> s,
                   Class<E> type)
Returns a dynamically typesafe view of the specified navigable set. 
 | 
static <T> NavigableSet<T> | 
Collections.synchronizedNavigableSet(NavigableSet<T> s)
Returns a synchronized (thread-safe) navigable set backed by the
 specified navigable set. 
 | 
static <T> NavigableSet<T> | 
Collections.unmodifiableNavigableSet(NavigableSet<T> s)
Returns an unmodifiable view of the specified navigable set. 
 | 
| Modifier and Type | Class and Description | 
|---|---|
class  | 
ConcurrentSkipListSet<E>
A scalable concurrent  
NavigableSet implementation based on
 a ConcurrentSkipListMap. | 
| Modifier and Type | Method and Description | 
|---|---|
NavigableSet<K> | 
ConcurrentNavigableMap.descendingKeySet()
Returns a reverse order  
NavigableSet view of the keys contained in this map. | 
NavigableSet<K> | 
ConcurrentSkipListMap.descendingKeySet()  | 
NavigableSet<E> | 
ConcurrentSkipListSet.descendingSet()
Returns a reverse order view of the elements contained in this set. 
 | 
NavigableSet<E> | 
ConcurrentSkipListSet.headSet(E toElement)  | 
NavigableSet<E> | 
ConcurrentSkipListSet.headSet(E toElement,
       boolean inclusive)  | 
NavigableSet<K> | 
ConcurrentNavigableMap.keySet()
Returns a  
NavigableSet view of the keys contained in this map. | 
NavigableSet<K> | 
ConcurrentSkipListMap.keySet()
Returns a  
NavigableSet view of the keys contained in this map. | 
NavigableSet<K> | 
ConcurrentNavigableMap.navigableKeySet()
Returns a  
NavigableSet view of the keys contained in this map. | 
NavigableSet<K> | 
ConcurrentSkipListMap.navigableKeySet()  | 
NavigableSet<E> | 
ConcurrentSkipListSet.subSet(E fromElement,
      boolean fromInclusive,
      E toElement,
      boolean toInclusive)  | 
NavigableSet<E> | 
ConcurrentSkipListSet.subSet(E fromElement,
      E toElement)  | 
NavigableSet<E> | 
ConcurrentSkipListSet.tailSet(E fromElement)  | 
NavigableSet<E> | 
ConcurrentSkipListSet.tailSet(E fromElement,
       boolean inclusive)  | 
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