public class TestThread5 {
  public static void main(String[] args) throws InterruptedException {
    Runner0 run5 = new Runner0();
    Thread th5 = new Thread(run5);
    th5.start();
    th5.join();//join()方法用在此处是为了等待主线程结束后运行子线程
 
    for(int i=0;i<5;i++){
      System.out.println("子线程："+i);
      }
  }
}
  class Runner0 implements Runnable{
    public void run(){
      for(int i=0;i<5;i++)
        System.out.println("主线程:"+i);
    }
  }

public class TestThread6{
  public static void main(String[] args) throws InterruptedException {
    Runner0 run5 = new Runner0();
    Thread th5 = new Thread(run5);
    th5.start();
//   th5.join();
 
    for(int i=0;i<4;i++){
      System.out.println("子线程："+i);
      }
  }
}
  class Runner0 implements Runnable{
    public void run(){
      for(int i=0;i<4;i++)
        System.out.println("主线程:"+i);
    }
  }