package xmu.sxl;

 import java.util.HashMap;

 import java.util.Map;

 public class copyMap {

     public static void main(String[] args) {

         // TODO Auto-generated method stub

          Map<String, String> map1 = new HashMap<String, String>();     //定义Map集合对象

         map1.put("apple", "苹果");     //向集合中添加对象

         map1.put("banana", "香蕉");

         map1.put("pear", "梨");

         System.out.println("第一个Map集合大小为："+map1.size()); //输出集合长度

         for(String key:map1.keySet()) {

              System.out.println("key="+key+" and value="+map1.get(key));

         }

         Map<String, String> map2 = new HashMap<String, String>();   //定义Map集合map2

         map2.put("car", "汽车");     //向集合中添加对象

         map2.put("plane", "飞机");

         map2.put("apple", "iphone手机");

         System.out.println("第二个Map集合大小为："+map2.size()); //输出集合长度

         System.out.println("把第二个Map集合添加到第一个Map集合中");

         map1.putAll(map2);        //将map2中的对象添加到map1中

         System.out.println("整合后的第一个Map集合大小为："+map1.size());

         for(String key:map1.keySet()) {

              System.out.println("key="+key+" and value="+map1.get(key));

         }

     }

 }