public class MaYi extends Thread {
  String name;
  public MaYi(String name){
    this.name = name;
  }
  public void run(){
    while(true){
      try {
        Thread.sleep(1000);//等待1秒
      } catch (InterruptedException e) {
        e.printStackTrace();
      }
      System.out.println(name+"蚂蚁正在下载......");
    }
  }
}

  public static void main1(String[] args) {
    MaYi m1 = new MaYi("1号");
    m1.start();
    MaYi m2 = new MaYi("2号");
    m2.start();

public class MyThread extends OtherClass implements Runnable { 
　　public void run() { 
　　 System.out.println("MyThread.run()"); 
　　} 
}

MyThread myThread = new MyThread(); 
Thread thread = new Thread(myThread); 
thread.start();

public void run() { 
　　if (target != null) { 
　　 target.run(); 
　　} 
}