| 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 | Interface and Description | 
|---|---|
interface  | 
NavigableSet<E>
A  
SortedSet extended with navigation methods reporting
 closest matches for given search targets. | 
| Modifier and Type | Class and Description | 
|---|---|
class  | 
TreeSet<E>
A  
NavigableSet implementation based on a TreeMap. | 
| Modifier and Type | Method and Description | 
|---|---|
static <E> SortedSet<E> | 
Collections.checkedSortedSet(SortedSet<E> s,
                Class<E> type)
Returns a dynamically typesafe view of the specified sorted set. 
 | 
SortedSet<E> | 
SortedSet.headSet(E toElement)
Returns a view of the portion of this set whose elements are
 strictly less than toElement. 
 | 
SortedSet<E> | 
TreeSet.headSet(E toElement)  | 
SortedSet<E> | 
NavigableSet.headSet(E toElement)
Returns a view of the portion of this set whose elements are
 strictly less than toElement. 
 | 
SortedSet<E> | 
SortedSet.subSet(E fromElement,
      E toElement)
Returns a view of the portion of this set whose elements range
 from fromElement, inclusive, to toElement,
 exclusive. 
 | 
SortedSet<E> | 
TreeSet.subSet(E fromElement,
      E toElement)  | 
SortedSet<E> | 
NavigableSet.subSet(E fromElement,
      E toElement)
Returns a view of the portion of this set whose elements range
 from fromElement, inclusive, to toElement,
 exclusive. 
 | 
static <T> SortedSet<T> | 
Collections.synchronizedSortedSet(SortedSet<T> s)
Returns a synchronized (thread-safe) sorted set backed by the specified
 sorted set. 
 | 
SortedSet<E> | 
SortedSet.tailSet(E fromElement)
Returns a view of the portion of this set whose elements are
 greater than or equal to fromElement. 
 | 
SortedSet<E> | 
TreeSet.tailSet(E fromElement)  | 
SortedSet<E> | 
NavigableSet.tailSet(E fromElement)
Returns a view of the portion of this set whose elements are
 greater than or equal to fromElement. 
 | 
static <T> SortedSet<T> | 
Collections.unmodifiableSortedSet(SortedSet<T> s)
Returns an unmodifiable view of the specified sorted set. 
 | 
| Modifier and Type | Method and Description | 
|---|---|
static <E> SortedSet<E> | 
Collections.checkedSortedSet(SortedSet<E> s,
                Class<E> type)
Returns a dynamically typesafe view of the specified sorted set. 
 | 
static <T> SortedSet<T> | 
Collections.synchronizedSortedSet(SortedSet<T> s)
Returns a synchronized (thread-safe) sorted set backed by the specified
 sorted set. 
 | 
static <T> SortedSet<T> | 
Collections.unmodifiableSortedSet(SortedSet<T> s)
Returns an unmodifiable view of the specified sorted set. 
 | 
| Constructor and Description | 
|---|
PriorityQueue(SortedSet<? extends E> c)
Creates a  
PriorityQueue containing the elements in the
 specified sorted set. | 
TreeSet(SortedSet<E> s)
Constructs a new tree set containing the same elements and
 using the same ordering as the specified sorted set. 
 | 
| Modifier and Type | Class and Description | 
|---|---|
class  | 
ConcurrentSkipListSet<E>
A scalable concurrent  
NavigableSet implementation based on
 a ConcurrentSkipListMap. | 
| Constructor and Description | 
|---|
ConcurrentSkipListSet(SortedSet<E> s)
Constructs a new set containing the same elements and using the
 same ordering as the specified sorted set. 
 | 
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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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