Java Collection How to - Clone a java hashmap

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Question

We would like to know how to clone a java hashmap.

Answer

import java.util.HashMap;
import java.util.Map;
//from w  w w .j  a  v  a2 s .  c  o  m
public class Main {    
     public static void main(String a[]) {    
        HashMap hashMap = new HashMap();    
        HashMap hashMap1 = new HashMap();
        
        hashMap.put(1, "One");
        hashMap.put(2, "Two");
        hashMap.put(3, "Three");
        System.out.println("Original HashMap : " + hashMap);
        
        hashMap1 = (HashMap) hashMap.clone();
        
        System.out.println("Copied HashMap : " + hashMap1);    
    }    
}

The code above generates the following result.

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