Java でマルチスレッド関数を使用してマルチスレッド プログラミングを実装する方法

public class MyThread extends Thread {
    public void run() {
        // 线程执行的代码逻辑
    }

    public static void main(String[] args) {
        MyThread thread = new MyThread();
        thread.start();
    }
}

public class MyThread extends Thread {
    private static int counter = 0;

    public void run() {
        synchronized (MyThread.class) {
            for (int i = 0; i < 1000; i++) {
                counter++;
            }
        }
    }

    public static void main(String[] args) throws InterruptedException {
        int numThreads = 10;
        MyThread[] threads = new MyThread[numThreads];

        for (int i = 0; i < numThreads; i++) {
            threads[i] = new MyThread();
            threads[i].start();
        }

        for (int i = 0; i < numThreads; i++) {
            threads[i].join();
        }

        System.out.println("Counter: " + counter);
    }
}

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

public class MyThread implements Runnable {
    private int id;

    public MyThread(int id) {
        this.id = id;
    }

    public void run() {
        // 线程执行的代码逻辑
        System.out.println("Thread " + id + " is running");
    }

    public static void main(String[] args) {
        int numThreads = 10;
        ExecutorService executor = Executors.newFixedThreadPool(numThreads);

        for (int i = 0; i < numThreads; i++) {
            executor.execute(new MyThread(i));
        }

        executor.shutdown();
    }
}