Uses of Interface
java.util.Map

Packages that use Map

Package	Description
java.util

Uses of Map in java.util

Subinterfaces of Map in java.util

Modifier and Type	Interface and Description
interface	SortedMap<K,V> A Map that further provides a total ordering on its keys.

Classes in java.util that implement Map

Modifier and Type	Class and Description
class	AbstractMap<K,V> This class provides a skeletal implementation of the Map interface, to minimize the effort required to implement this interface.
class	HashMap<K,V> Hash table based implementation of the Map interface.
class	Hashtable<K,V> This class implements a hash table, which maps keys to values.
class	LinkedHashMap<K,V> Hash table and linked list implementation of the Map interface, with predictable iteration order.

Fields in java.util declared as Map

Modifier and Type	Field and Description
static Map	Collections.EMPTY_MAP The empty map (immutable).

Methods in java.util that return Map

Modifier and Type	Method and Description
static <K,V> Map<K,V>	Collections.checkedMap(Map<K,V> m, Class<K> keyType, Class<V> valueType) Returns a dynamically typesafe view of the specified map.
static <K,V> Map<K,V>	Collections.emptyMap() Returns the empty map (immutable).
static <K,V> Map<K,V>	Collections.singletonMap(K key, V value) Returns an immutable map, mapping only the specified key to the specified value.
static <K,V> Map<K,V>	Collections.synchronizedMap(Map<K,V> m) Returns a synchronized (thread-safe) map backed by the specified map.
static <K,V> Map<K,V>	Collections.unmodifiableMap(Map<? extends K,? extends V> m) Returns an unmodifiable view of the specified map.

Methods in java.util with parameters of type Map

Modifier and Type	Method and Description
static <K,V> Map<K,V>	Collections.checkedMap(Map<K,V> m, Class<K> keyType, Class<V> valueType) Returns a dynamically typesafe view of the specified map.
static <E> Set<E>	Collections.newSetFromMap(Map<E,Boolean> map) Returns a set backed by the specified map.
void	Map.putAll(Map<? extends K,? extends V> m) Copies all of the mappings from the specified map to this map (optional operation).
void	Hashtable.putAll(Map<? extends K,? extends V> t) Copies all of the mappings from the specified map to this hashtable.
void	HashMap.putAll(Map<? extends K,? extends V> m) Copies all of the mappings from the specified map to this map.
void	AbstractMap.putAll(Map<? extends K,? extends V> m) Copies all of the mappings from the specified map to this map (optional operation).
static <K,V> Map<K,V>	Collections.synchronizedMap(Map<K,V> m) Returns a synchronized (thread-safe) map backed by the specified map.
static <K,V> Map<K,V>	Collections.unmodifiableMap(Map<? extends K,? extends V> m) Returns an unmodifiable view of the specified map.

Constructors in java.util with parameters of type Map

Constructor and Description
HashMap(Map<? extends K,? extends V> m) Constructs a new HashMap with the same mappings as the specified Map.
Hashtable(Map<? extends K,? extends V> t) Constructs a new hashtable with the same mappings as the given Map.
LinkedHashMap(Map<? extends K,? extends V> m) Constructs an insertion-ordered LinkedHashMap instance with the same mappings as the specified map.