Map.EntrySet的使用方法

1.package edu.smc.test;
2.
3.import java.util.HashMap;
4.import java.util.Iterator;
5.import java.util.Map;
6.import java.util.Map.Entry;
7.
8.public class TestEntrySet {
9.    public static void main(String[] args) {
10.        Map<String,String> map=new HashMap<String,String>();
11.        map.put("1", "张三");
12.        map.put("2", "李四");
13.        map.put("3", "王五");
14.        /*方法一 ：迭代程序*/
15.        System.out.println("方法一：");
16.        Iterator iterator=map.entrySet().iterator();
17.        while(iterator.hasNext()){
18.           Map.Entry<String, String> entry= (Entry<String, String>) iterator.next();
19.           System.out.println("key:"+entry.getKey()+" value"+entry.getValue());
20.          }
21.        /*方法二*/
22.        System.out.println("方法二：");
23.        for (Map.Entry<String, String> m : map.entrySet()) {
24.              System.out.println("key:"+m.getKey()+" value"+m.getValue());
25.          }
26.      }
27.}
package edu.smc.test;

import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Map.Entry;

public class TestEntrySet {
	public static void main(String[] args) {
		Map<String,String> map=new HashMap<String,String>();
		map.put("1", "张三");
		map.put("2", "李四");
		map.put("3", "王五");
		/*方法一 ：迭代程序*/
		System.out.println("方法一：");
		Iterator iterator=map.entrySet().iterator();
        while(iterator.hasNext()){
           Map.Entry<String, String> entry= (Entry<String, String>) iterator.next();
		   System.out.println("key:"+entry.getKey()+" value"+entry.getValue());
		  }
        /*方法二*/
        System.out.println("方法二：");
        for (Map.Entry<String, String> m : map.entrySet()) {
        	  System.out.println("key:"+m.getKey()+" value"+m.getValue());
          }
      }
}
结果：

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1.方法一：
2.key:3 value王五
3.key:2 value李四
4.key:1 value张三
5.方法二：
6.key:3 value王五
7.key:2 value李四
8.key:1 value张三