在java8中你可以使用 foreach + Lambda拉姆达表达式遍历

package com.qn.test;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;/** * Created by Administrator on 2017/11/30 0030. */public class DemoTest {    public static void main(String[] args) {        Map<String , String> map = new HashMap<>();        map.put("a","a");        map.put("b","b");        map.put("c","c");        map.put("d","d");        map.put("e","e");        map.put("f","f");        map.forEach((k,v)->{            System.out.println("k="+k+"，v="+v);        });        List<String> list = new ArrayList<>();        list.add("aaa");        list.add("bbbbb");        list.add("ccccccc");        list.add("dddd");        list.forEach(v->{            System.out.println(v);        });    }}