public static void main(String[] args) {

HashMapmap =new HashMap<>();

    map.put(1,"11");

    map.put(2,"哈哈");

    map.put(3,"shdja");

    System.out.println(map);

    for (Map.Entry e: map.entrySet()){

System.out.println(e.getKey()+"="+e.getValue()+"\t");

    }

System.out.println();

    for (Integer i: map.keySet()){

System.out.println(i+map.get(i)+"\t");

    }

System.out.println();

    for (String s: map.values()){

System.out.println(s +"\t");

    }

}