java.util
Class IdentityHashMap

java.lang.Object
  |
  +--java.util.AbstractMap
        |
        +--java.util.IdentityHashMap
All Implemented Interfaces:
Cloneable, Map, java.io.Serializable

public synchronized class IdentityHashMap
extends AbstractMap
implements Map, java.io.Serializable, Cloneable


Constructor Summary
IdentityHashMap()
           
IdentityHashMap(int)
           
IdentityHashMap(Map)
           
 
Method Summary
 void clear()
           
 Object clone()
           
 boolean containsKey(Object)
           
 boolean containsValue(Object)
           
 Set entrySet()
           
 boolean equals(Object)
          Determines if this object is "equal" to another object.
 Object get(Object)
           
 int hashCode()
           
 boolean isEmpty()
           
 Set keySet()
           
 Object put(Object, Object)
           
 void putAll(Map)
           
 Object remove(Object)
           
 int size()
           
 Collection values()
           
 
Methods inherited from class java.util.AbstractMap
toString
 

Constructor Detail

IdentityHashMap

public IdentityHashMap()

IdentityHashMap

public IdentityHashMap(int)

IdentityHashMap

public IdentityHashMap(Map)
Method Detail

size

public int size()
Specified by:
size in interface Map
Overrides:
size in class AbstractMap

isEmpty

public boolean isEmpty()
Overrides:
isEmpty in class AbstractMap

get

public Object get(Object)
Specified by:
get in interface Map
Overrides:
get in class AbstractMap

containsKey

public boolean containsKey(Object)
Specified by:
containsKey in interface Map
Overrides:
containsKey in class AbstractMap

containsValue

public boolean containsValue(Object)
Overrides:
containsValue in class AbstractMap

put

public Object put(Object,
                  Object)
Specified by:
put in interface Map
Overrides:
put in class AbstractMap

putAll

public void putAll(Map)
Overrides:
putAll in class AbstractMap

remove

public Object remove(Object)
Overrides:
remove in class AbstractMap

clear

public void clear()
Overrides:
clear in class AbstractMap

equals

public boolean equals(Object)
Description copied from class: Object
Determines if this object is "equal" to another object.

In general, objects should be instances of the same class with the same guts to be considered equal. For example, the code below only prints same value since s and t are different strings though they have the same value: "hello".

 String s = new String("hello");
 String t = new String("hello");
 if (s.equals(t)) System.out.println("same value");
 if (s == t) System.out.println("same string");

 

Overrides:
equals in class AbstractMap
Following copied from class: java.lang.Object
Parameters:
is - the other Object to which this one is compared
Returns:
true if this Object is equal to other

hashCode

public int hashCode()
Overrides:
hashCode in class AbstractMap

clone

public Object clone()
Overrides:
clone in class AbstractMap

keySet

public Set keySet()
Specified by:
keySet in interface Map
Overrides:
keySet in class AbstractMap

values

public Collection values()
Overrides:
values in class AbstractMap

entrySet

public Set entrySet()
Specified by:
entrySet in class AbstractMap