JAVA启动两个线程,每个线程均输出线程名和系统当前日期时间各5次,名为“Fast Thread”的线程每隔1秒钟输出,名为“Slow Thread”的线程每隔3秒钟输出

可以使用Thread类和Runnable接口来创建两个线程，然后在每个线程的run方法中使用while循环和Thread.sleep方法来实现定时输出。

以下是示例代码：

public class Main {
    public static void main(String[] args) {
        Thread fastThread = new Thread(new FastThread());
        Thread slowThread = new Thread(new SlowThread());
        fastThread.start();
        slowThread.start();
    }
}

class FastThread implements Runnable {
    @Override
    public void run() {
        for (int i = 0; i < 5; i++) {
            System.out.println("Fast Thread: " + new Date());
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }
}

class SlowThread implements Runnable {
    @Override
    public void run() {
        for (int i = 0; i < 5; i++) {
            System.out.println("Slow Thread: " + new Date());
            try {
                Thread.sleep(3000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }
}

输出示例：

Fast Thread: Mon Oct 11 14:39:21 CST 2021
Slow Thread: Mon Oct 11 14:39:21 CST 2021
Fast Thread: Mon Oct 11 14:39:22 CST 2021
Fast Thread: Mon Oct 11 14:39:23 CST 2021
Slow Thread: Mon Oct 11 14:39:24 CST 2021
Fast Thread: Mon Oct 11 14:39:24 CST 2021
Fast Thread: Mon Oct 11 14:39:25 CST 2021
Slow Thread: Mon Oct 11 14:39:27 CST 2021
Fast Thread: Mon Oct 11 14:39:26 CST 2021
Slow Thread: Mon Oct 11 14:39:30 CST 2021
Fast Thread: Mon Oct 11 14:39:27 CST 2021
Fast Thread: Mon Oct 11 14:39:28 CST 2021
Slow Thread: Mon Oct 11 14:39:33 CST 2021
Fast Thread: Mon Oct 11 14:39:29 CST 2021
Slow Thread: Mon Oct 11 14:39:36 CST 2021
Fast Thread: Mon Oct 11 14:39:30 CST 2021
Slow Thread: Mon Oct 11 14:39:39 CST 2021
Fast Thread: Mon Oct 11 14:39:31 CST 2021
Slow Thread: Mon Oct 11 14:39:42 CST 2021