Java中继承“Thread”类

Question

分别定义 “DownloadThread”子类和“MusicThread”子类，来实现多线程。使两个子类重写后的“run()”方法在控制台每隔一秒分别输出“下载” 及“听歌”即可，并观察两者每次的输出顺序。
求写法

Answer 1

自定义类继承extends Thread，重写run方法，方法内通过while（true）循环，并且通过sleep(1000)实现每隔1秒执行一次。

public class DownloadThread extends Thread{
    @Override
    public void run() {
        while (true) {
            System.out.println("下载");
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }
}

public class MusicThread extends Thread{
    @Override
    public void run() {
        while (true) {
            System.out.println("听歌");
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }
}

public class ThreadTest {
    public static void main(String[] args) {
        DownloadThread dThread=new DownloadThread();
        MusicThread mThread=new MusicThread();
        dThread.start();
        mThread.start();
    }
}