public abstract class IntGenerator {
    private volatile boolean canceled = false;
    public abstract int next();
    // Allow this to be canceled:
    public void cancel() { canceled = true; }
    public boolean isCanceled() { return canceled; }
}

public class Liftoff  implements  Runnable{   //接口
    @Override
    public void run() {           //实现run方法
    }
}
public  static  void  main(String []arg){
       //第一种
       Liftoff liftoff = new Liftoff();
       liftoff.run();
       //第二种
       Thread thread = new Thread(new Liftoff());
       thread.start();
       }
 }