Map遍历

Map的遍历有两种方式,个人感觉第二种用起来更方便一些:

    @Test
    public void test2(){
        Map<String, Integer> map = new HashMap<String, Integer>();
        map.put("zhangsan", 1000);
        map.put("lisi", 2000);
        map.put("wangwu", 3000);
        //方式一
        Set<Map.Entry<String, Integer>> entrySet = map.entrySet();
        for(Map.Entry<String, Integer> m:entrySet){
            System.out.println(m.getKey()+","+m.getValue());
        }
        System.out.println("-----------------");
        //方式二
        Set<String> keys = map.keySet();
        for(String key:keys){
            System.out.println(map.get(key));
        }
    }
原文地址:https://www.cnblogs.com/lenve/p/4518002.html