Uses of Interface
java.util.Set

Packages that use Set

Package	Description
java.util

Uses of Set in java.util

Subinterfaces of Set in java.util

Modifier and Type	Interface and Description
interface	NavigableSet<E> NavigableSet is a SortedSet with navigation methods answering the closest matches for specified item.
interface	SortedSet<E> SortedSet is a Set which iterates over its elements in a sorted order.

Classes in java.util that implement Set

Modifier and Type	Class and Description
class	AbstractSet<E> An AbstractSet is an abstract implementation of the Set interface.
class	HashSet<E> HashSet is an implementation of a Set.
class	LinkedHashSet<E> LinkedHashSet is a variant of HashSet.
class	TreeSet<E> TreeSet is an implementation of SortedSet.

Fields in java.util declared as Set

Modifier and Type	Field and Description
static Set	Collections.EMPTY_SET An empty immutable instance of Set.

Methods in java.util that return Set

Modifier and Type	Method and Description
static <T> Set<T>	Collections.emptySet() Returns a type-safe empty, immutable Set.
Set<Map.Entry<K,V>>	TreeMap.entrySet() Returns a set containing all of the mappings in this map.
Set<Map.Entry<K,V>>	Map.entrySet() Returns a Set containing all of the mappings in this Map.
Set<Map.Entry<K,V>>	LinkedHashMap.entrySet() Returns a set containing all of the mappings in this map.
Set<Map.Entry<K,V>>	IdentityHashMap.entrySet() Returns a set containing all of the mappings in this map.
Set<Map.Entry<K,V>>	Hashtable.entrySet() Returns a set of the mappings contained in this Hashtable.
Set<Map.Entry<K,V>>	HashMap.entrySet() Returns a set containing all of the mappings in this map.
abstract Set<Map.Entry<K,V>>	AbstractMap.entrySet() Returns a set containing all of the mappings in this map.
Set<K>	TreeMap.keySet() Returns a set of the keys contained in this map.
Set<K>	Map.keySet() Returns a set of the keys contained in this Map.
Set<K>	LinkedHashMap.keySet() Returns a set of the keys contained in this map.
Set<K>	IdentityHashMap.keySet() Returns a set of the keys contained in this map.
Set<K>	Hashtable.keySet() Returns a set of the keys contained in this Hashtable.
Set<K>	HashMap.keySet() Returns a set of the keys contained in this map.
Set<K>	AbstractMap.keySet() Returns a set of the keys contained in this map.
static <E> Set<E>	Collections.newSetFromMap(Map<E,Boolean> map) Answers a set backed by a map.
static <E> Set<E>	Collections.singleton(E object) Returns a set containing the specified element.
static <E> Set<E>	Collections.synchronizedSet(Set<E> set) Returns a wrapper on the specified set which synchronizes all access to the set.
static <E> Set<E>	Collections.unmodifiableSet(Set<? extends E> set) Returns a wrapper on the specified set which throws an UnsupportedOperationException whenever an attempt is made to modify the set.

Methods in java.util with parameters of type Set

Modifier and Type	Method and Description
static <E> Set<E>	Collections.synchronizedSet(Set<E> set) Returns a wrapper on the specified set which synchronizes all access to the set.
static <E> Set<E>	Collections.unmodifiableSet(Set<? extends E> set) Returns a wrapper on the specified set which throws an UnsupportedOperationException whenever an attempt is made to modify the set.