hashmap遍历取值_java map遍历

public static void main(String[] args) {
    Map<String,Object> map = new HashMap<>();
    map.put("嘟嘟",1);
    map.put("毛毛",3);
    map.put("吉吉",27);
    map.put("翠花",16);
    map.put("熊大",9);
    map.put("熊二",47);
    map.put("光头强",22);

    //第一种 通过map.keySet()来遍历
    System.out.println("通过map.keySet()来遍历Map......");
    for (String key : map.keySet()) {
        System.out.println("key:" + key + ", value:" + map.get(key));
    }

    //第二种 通过map.entrySet().iterator()来循环
    System.out.println("通过map.entrySet().iterator()来循环取值......");
    Iterator<Map.Entry<String, Object>> iterator = map.entrySet().iterator();
    while (iterator.hasNext()){
        Map.Entry<String, Object> entry = iterator.next();
        System.out.println("key:" + entry.getKey() + ", value:" + entry.getValue());
    }

    //第三种  通过map.entrySet()来遍历
    System.out.println("通过map.entrySet()来遍历Map......");
    for (Map.Entry<String, Object> entry : map.entrySet()) {
        System.out.println("key:" + entry.getKey() + ", value:" + entry.getValue());
    }

}