public class threadTest1 {

  public static void main(String[] args) {
    compute t = new compute();
    compute1 t1 = new compute1();
    t.start();
    t1.start();
  }
}

class compute extends Thread {
  
  int i = 0;
  public void run() {
    for (int i = 0; i < 10; i++) {
      System.out.println(i);
    }
  }
}

class compute1 extends Thread {
  public void run() {
    for (int i = 0 ; i < 10; i++) {
      System.out.println("this number is: " + i);
    }
  }
}