To identify duplicate keys in HasMap?Example

1.To identify duplicate keys in HasMap JVM internally uses equals() Method.
                          
         PROGRAM:
                                class DuplicateKey
                                 {
                                   HashMap hm=new HashMap();
                                   hm.put("10","Bhaskar");
                                   hm.put("10","Ajantha");
                                   System.out.println(hm);
                                          }
                      OUTPUT :
                                      {10 , Ajantha}         

In HashMap  it overrides the duplicate    key of it's values.

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