Java/Collections Data Structure/IdentityHashMap

Associating a Value with an Object

   <source lang="java">

import java.util.IdentityHashMap; import java.util.Map; public class Main {

 public static void main(String[] argv) throws Exception {
   Map objMap = new IdentityHashMap();
   Object o1 = new Integer(123);
   Object o2 = new Integer(123);
   objMap.put(o1, "first");
   objMap.put(o2, "second");
   Object v1 = objMap.get(o1); // first
   Object v2 = objMap.get(o2); // second
 }

}

</source>