最有效率的方式遍历Map

package com.cn.filter;

import java.util.HashMap;

import java.util.Iterator;

import java.util.Map;

import java.util.Set;

/**

*

*最有效率的方式遍历Map

*

*/

public class Test {

public static void main(String[] args)

{

HashMap<String, String> hm = new HashMap<String, String>();

hm.put("AA", "11");

hm.put("BB", "22");

hm.put("CC", "33");

hm.put("DD", "44");

Set<Map.Entry<String, String>> entrySet = hm.entrySet();

Iterator<Map.Entry<String, String>> iter = entrySet.iterator();

while (iter.hasNext()) {

Map.Entry<String, String> entry = iter.next();

System.out.println(entry.getKey() + "\t" + entry.getValue());

}

}

}