Java Program to copy all of the mappings from the specified map to another map

import java.util.*;  
public class demo1 
{  
 public static void main(String args[]) 
 {  
  HashMap<Integer,String> hashmap= new HashMap<Integer,String>();
  HashMap <Integer,String> hashmap1 = new HashMap <Integer,String> ();
  hashmap.put(1, "C#");
  hashmap.put(2, "C++");
  hashmap.put(3, "Java");
  System.out.println("\nValues in first map: " + hashmap);
  
  hashmap1.put(4, "Python");
  hashmap1.put(5, "Ruby");
  System.out.println("\nValues in second map: " + hashmap1);

  hashmap1.putAll(hashmap);
  System.out.println("\nValues in a map are: " + hashmap1);
 }
}