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The Map interface provides three collection views, which allow a map's contents to be viewed as a set of keys, collection of values, or set of key-value mappings. The order of a map is defined as the order in which the iterators on the map's collection views return their elements.
- TreeMap
Constructs a new, empty tree map, using the natural ordering...
- Use
Uses of Interface java.util.Map. Packages that use Map ;...
- EnumMap
If no such object exists, the map should be "wrapped" using...
- WeakHashMap
Hash table based implementation of the Map interface, with...
- LinkedHashMap
Hash table and linked list implementation of the Map...
- NavigableMap
Nested classes/interfaces inherited from interface...
- IdentityHashMap
Returns the hash code value for this map. The hash code of a...
- AbstractMap
Specified by: put in interface Map<K,V> Implementation...
- TreeMap
2 lip 2024 · Learn how to use the Map interface in Java to create and manipulate key-value pairs. See examples of HashMap, LinkedHashMap, and TreeMap classes that implement the Map interface.
Learn how to use the Map interface of the Java collections framework, which provides the functionality of the map data structure. See the methods, subinterfaces, and classes that implement Map, and how to create and manipulate maps using HashMap and TreeMap.
Learn how to use the Map interface to create and manipulate key-value pairs in Java. See examples of basic and bulk operations, collection views, and JDK 8 aggregate operations.
Learn how to use Map interface and its subinterface Map.Entry in Java. See the hierarchy, methods, and examples of Map and its implementations such as HashMap, LinkedHashMap, and TreeMap.
Use Maps when you want to retrieve and update elements by keys, or perform lookups by keys. Some examples: A map of error codes and their descriptions. A map of zip codes and cities. A map of managers and employees. Each manager (key) is associated with a list of employees (value) he manages.
The Map interface provides three methods, which allows map’s contents to be viewed as a set of keys (keySet () method), a collection of values (values () method), or set of key-value mappings (entrySet () method).
