class MyRunnable implements Runnable {
  String name;
  MyRunnable(String n) {
    name = n;
  }
  public void run() {
    int i, j;
    for (i=0; i<10; i++) {
      try {
	Thread.sleep(10);  // 10ミリ秒お休み
      } catch (InterruptedException e) {}
      System.out.print(name+": "+i+", ");
    }
  }
}

public class ThreadTest {
  public static void main(String[] args) {
    Thread t1 = new Thread(new MyRunnable("A"));
    Thread t2 = new Thread(new MyRunnable("B"));
    Thread t3 = new Thread(new MyRunnable("C"));
    t1.start();
    t2.start();
    t3.start();
  }
}