Class IdentityHashMap

  • All Implemented Interfaces:
    java.io.Serializable, java.lang.Cloneable, java.util.Map

    public class IdentityHashMap
    extends java.util.HashMap
    IdentityHashMap similar to JDK1.4's java.util.IdentityHashMap
    Author:
    Davanum Srinivas
    See Also:
    Serialized Form
    • Nested Class Summary

      • Nested classes/interfaces inherited from class java.util.AbstractMap

        java.util.AbstractMap.SimpleEntry<K extends java.lang.Object,​V extends java.lang.Object>, java.util.AbstractMap.SimpleImmutableEntry<K extends java.lang.Object,​V extends java.lang.Object>
      • Nested classes/interfaces inherited from interface java.util.Map

        java.util.Map.Entry<K extends java.lang.Object,​V extends java.lang.Object>
    • Constructor Summary

      Constructors 
      Constructor Description
      IdentityHashMap()
      Constructor for IdentityHashMap.
      IdentityHashMap​(int initialCapacity)
      Constructor for IdentityHashMap.
      IdentityHashMap​(int initialCapacity, float loadFactor)
      Constructor for IdentityHashMap.
      IdentityHashMap​(java.util.Map t)
      Constructor for IdentityHashMap.
    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      java.lang.Object add​(java.lang.Object value)
      adds an object to the Map.
      boolean containsKey​(java.lang.Object key)  
      java.lang.Object get​(java.lang.Object key)  
      java.lang.Object put​(java.lang.Object key, java.lang.Object value)  
      java.lang.Object remove​(java.lang.Object key)  
      • Methods inherited from class java.util.HashMap

        clear, clone, compute, computeIfAbsent, computeIfPresent, containsValue, entrySet, forEach, getOrDefault, isEmpty, keySet, merge, putAll, putIfAbsent, remove, replace, replace, replaceAll, size, values
      • Methods inherited from class java.util.AbstractMap

        equals, hashCode, toString
      • Methods inherited from class java.lang.Object

        finalize, getClass, notify, notifyAll, wait, wait, wait
      • Methods inherited from interface java.util.Map

        equals, hashCode
    • Constructor Detail

      • IdentityHashMap

        public IdentityHashMap​(int initialCapacity,
                               float loadFactor)
        Constructor for IdentityHashMap.
        Parameters:
        initialCapacity -
        loadFactor -
      • IdentityHashMap

        public IdentityHashMap​(int initialCapacity)
        Constructor for IdentityHashMap.
        Parameters:
        initialCapacity -
      • IdentityHashMap

        public IdentityHashMap()
        Constructor for IdentityHashMap.
      • IdentityHashMap

        public IdentityHashMap​(java.util.Map t)
        Constructor for IdentityHashMap.
        Parameters:
        t -
    • Method Detail

      • get

        public java.lang.Object get​(java.lang.Object key)
        Specified by:
        get in interface java.util.Map
        Overrides:
        get in class java.util.HashMap
        See Also:
        Map.get(Object)
      • put

        public java.lang.Object put​(java.lang.Object key,
                                    java.lang.Object value)
        Specified by:
        put in interface java.util.Map
        Overrides:
        put in class java.util.HashMap
        See Also:
        Map.put(Object, Object)
      • add

        public java.lang.Object add​(java.lang.Object value)
        adds an object to the Map. new Identity(obj) is used as key
      • remove

        public java.lang.Object remove​(java.lang.Object key)
        Specified by:
        remove in interface java.util.Map
        Overrides:
        remove in class java.util.HashMap
        See Also:
        Map.remove(Object)
      • containsKey

        public boolean containsKey​(java.lang.Object key)
        Specified by:
        containsKey in interface java.util.Map
        Overrides:
        containsKey in class java.util.HashMap
        See Also:
        Map.containsKey(Object)