Map三种遍历方式,秒懂,你懂

package com.Cx_330.run;

import org.junit.Test;

import java.time.Instant;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.time.format.DateTimeFormatter;
import java.util.*;
import java.util.function.Consumer;

public class CCC {
    public static void main(String[] args) {
        HashMap<Integer, String> map = new HashMap<>();
        map.put(1,"张三");
        map.put(2,"张小三");
        map.put(3,"张三小");
        map.put(4,"小张三");
        map.put(5,"三小张");
        Set<Integer> integers = map.keySet();
        for (Integer i:integers){
            System.out.println("键: "+i+"值: "+map.get(i));
        }
        System.out.println("------------------------");
        Set<Map.Entry<Integer, String>> mp2 = map.entrySet();
        for (Map.Entry<Integer, String> x:mp2){
            System.out.println("键: "+x.getKey()+"值: "+x.getValue());
        }
        System.out.println("------------------------");
        map.forEach((k,v)->System.out.println("键: "+k+"值: "+v));
    }
}