java.util.HashMap.putAll() 方法

package com.codingdict;

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 hash map
      newmap1.put(1, "tutorials");
      newmap1.put(2, "point");
      newmap1.put(3, "is best");

      System.out.println("Values in newmap1: "+ newmap1);

      // put all values in newmap2
      newmap2.putAll(newmap1);

      System.out.println("Values in newmap2: "+ newmap2);
   }    
}