新・Java入門編43: 並行・並列処理について学習しよう

https://docs.oracle.com/javase/jp/17/docs/api/java.base/java/lang/Thread.html

https://paiza.jp/works/java/new-primer/java-new-primer-33/102000

https://paiza.jp/works/java/new-primer/java-new-primer-33/102002

import java.util.*;
import java.time.*;
import java.time.format.*;

public class Main {
    
    public static void main(String... args) {
        
        println("main start");

        var t1 = new Thread(() -> {
            println("t1 start");
            for (var i = 0; i < 5; i++) {
                println("t1");
            }
            println("t1 end");
        });

        var t2 = new Thread(() -> {
            println("t2 start");
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                println("割り込みが発生");
            }
            println("t2 end");
        });

        t1.start();
        t2.start();

        for (var i = 0; i < 10; i++) {
            println("main");
        }
    
        try {
            Thread.sleep(500);
            t2.interrupt();
            
            t1.join();
            t2.join();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }

        println("main end");
    }

    /**
     * 時間を付与して文字列を出力
     */
    static void println(String msg) {
        System.out.println(
            LocalDateTime.now().format(
                DateTimeFormatter.ofPattern("mm:ss:n")) + " " + msg);
    }
}