Difference between IdentityHashMap and HashMap

In Identity Hashmap, JVM uses == operator to identify duplicate keys.

Ex: IdentityHashMap m=new IdentityHashMap();

Integer i1=new Integer(10);

Integer i2=new Integer(10);

m.put(i1, "GetSure");m.put(i2, "Infotech");

SOP(m) --> O/P: 10 - GetSure, 10 - Infotech

In Hashmap, the JVM uses .equals() method to identify duplicate keys.

Ex: HashMap m=new HashMap();

Integer i1=new Integer(10);

Integer i2=new Integer(10);

m.put(i1, "GetSure");

m.put(i2, "Infotech");

SOP(m) --> O/P: Only 10 - Infotech