在java8中你可以使用 foreach + Lambda拉姆達表示式遍歷
阿新 • • 發佈:2019-02-12
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); }); } }