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How to Clone a Map in Java
The java.util.HashMap class is the Hash table based implementation of the Map interface. To clone a Map in Java, use the clone() method.
Example
Let us see an example to clone a Map −
import java.util.*; public class HashMapDemo { public static void main(String args[]) { // create two hash maps HashMap newmap1 = new HashMap(); HashMap newmap2 = new HashMap(); // populate 1st map newmap1.put(1, "This"); newmap1.put(2, "is"); newmap1.put(3, "it!"); // clone 1st map newmap2 = (HashMap)newmap1.clone(); System.out.println("1st Map: " + newmap1); System.out.println("Cloned Map: " + newmap2); } }
Output
1st Map: {1=This, 2=is, 3=it!} Cloned Map: {1=This, 2=is, 3=it!}
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