public class TestThread extends Thread {
  int count = 3;

  public TestThread(String ThreadName) {
    super(ThreadName);
  }

  @Override
  public void run() {
    for (int i = 0; i < 10; i++)
      if (count > 0) {
        System.out.println(Thread.currentThread().getName() + "--->" + count);
        count--；
      }
  }

  public static void main(String[] args) {
    //new三个线程并启动
    new TestThread("线程一").start();
    new TestThread("线程二").start();
    new TestThread("线程三").start();
  }
}

public class TestThread implements Runnable {
  int count = 3;

  public TestThread() {
  }

  @Override
  public void run() {
    for (int i = 0; i < 10; i++)
      if (count > 0) {
        System.out.println(Thread.currentThread().getName() + "--->" + count);
        count--；
      }
  }

  public static void main(String[] args) {
    TestThread tr = new TestThread();
    //new三个线程并启动同一个Runnable
    new Thread(tr, "线程一").start();
    new Thread(tr, "线程二").start();
    new Thread(tr, "线程三").start();
  }
}