/**
* @(#)Map_putAllTest.java
*
* Map_putAllTest application
*
* @author
* @version 1.00 2013/10/12
*/
import java.util.HashMap;
public class Map_putAllTest {
public static void main(String[] args){
//两个map具有不同的key
HashMap map1=new HashMap();
map1.put("1", "A");
HashMap map2 = new HashMap();
map2.put("2", "B");
map2.put("3", "C");
map1.putAll(map2);
System.out.println(map1);
//两个map具有重复的key
HashMap map3=new HashMap();
map3.put("1", "A");
HashMap map4 = new HashMap();
map4.put("1", "B");
map4.put("3", "C");
map3.putAll(map4);
System.out.println(map3);
}
Output:
{3=C, 2=B, 1=A}
{3=C, 1=B}