JAVA HashMap遍历列举

package com.wdy.hashmap;import java.util.HashMap;
import java.util.Map;
import java.util.Set;public class HashMapDemo {public static void main(String[] args) {// TODO Auto-generated method stub// 创建Hashmap对象HashMap<String,String> map = new HashMap<String,String>();// 添加元素map.put("abc","qwe");map.put("123","4566");map.put("key", "value");// 遍历map对象printMapByKeyValue(map);System.out.println("-----------------------------");printMapByMapEntry(map);}private static void printMapByMapEntry(HashMap<String, String> map) {// TODO Auto-generated method stubSet<Map.Entry<String, String>> entrys = map.entrySet();for(Map.Entry<String, String> entry : entrys) {String key = entry.getKey();String value = entry.getValue();System.out.println(key + "\t------\t" + value);}}private static void printMapByKeyValue(HashMap<String, String> map) {// TODO Auto-generated method stubSet<String> set = map.keySet();for(String key : set) {String value = map.get(key);System.out.println(key + "\t------\t" + value);}}}