如何通过继承Thread类来创建线程

public class Thread1 {
     
    public static void main(String[] args) {
         
        Thread.currentThread().setName("主线程");
        System.out.println(Thread.currentThread().getName()+":"+"输出的结果");
        //创建一个新线程
        ThreadDemo1 thread1 = new ThreadDemo1();
        //为线程设置名称
        thread1.setName("线程一");
        //开启线程
        thread1.start();
    }
}
 
class ThreadDemo1 extends Thread{
     
    @Override
    public void run() {
        System.out.println(Thread.currentThread().getName()+":"+"输出的结果");
    }
     
}