package com.xt.map;

import java.util.HashMap;

import java.util.Iterator;

import java.util.Map;

import java.util.Map.Entry;

import java.util.Set;

public class HashMapTest {

    public static void main(String[] args) {

        Map<Integer,Student> students=new HashMap<>();

        students.put(1, new Student("111"));

        Set<Integer> Keys=students.keySet();

        //

        for (Integer key : Keys) {

            System.out.println(students.get(key));

        }

        //

        Iterator<Integer> iterator=Keys.iterator();

        while(iterator.hasNext()) {

            System.out.println(students.get(iterator.next()));

        }

        Set<Entry<Integer,Student>> entrys = students.entrySet();

        //

        for (Entry<Integer, Student> entry : entrys) {

            System.out.println(entry.getValue());

        }

        //

        Iterator<Entry<Integer, Student>> iterator1=entrys.iterator();

        while(iterator1.hasNext()) {

            System.out.println(iterator1.next().getValue());

        }

    }

}