key可重复的Map

 public static void main(String[] args)
    {
        Map<String,String> map = new HashMap<>();
        map.put("姓名","小明");
        map.put("姓名","小红");
        map.put("姓名","张三");
        map.put("姓名","李四");
        System.out.println("普通map:"+map);

        Map<String, String> IdentityHashMap = new IdentityHashMap<>();
        IdentityHashMap.put(new String("name"),"路飞");
        IdentityHashMap.put(new String("name"),"小叮当");
        IdentityHashMap.put(new String("name"),"圣斗士");
        System.out.println("key可重复map:"+IdentityHashMap);
    }