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

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