请教大家下线程的问题

[fromtc]

public class ThreadTest extends Thread  {
  private String s;
  

  public ThreadTest(String str){
	  s=str;
  }

  public void run(){
	  for(int i=0;i<10; i++){
		  System.out.println(s +":"+i);
		  try{
				  Thread.sleep(1000);
 
		}catch (Exception e){}
	  }
  }

public static void main(String[] arg){
	ThreadTest mt= new ThreadTest("Thread");
	for(int i=0;i<=4;i++)
		new Thread(mt).start();
	System.out.println("This is ThreadTest");
	
}
}  

输出结果是
Thread:0
This is ThreadTest
Thread:0
Thread:0
Thread:0
Thread:0
Thread:1
Thread:1
Thread:1
Thread:1
Thread:1
Thread:2
Thread:2
Thread:2
Thread:2
Thread:2
Thread:3
Thread:3
Thread:3
Thread:3
Thread:3
Thread:4
Thread:4
Thread:4
Thread:4
Thread:4
Thread:5
Thread:5
Thread:5
Thread:5
Thread:5
Thread:6
Thread:6
Thread:6
Thread:6
Thread:6
Thread:7
Thread:7
Thread:7
Thread:7
Thread:7
Thread:8
Thread:8
Thread:8
Thread:8
Thread:8
Thread:9
Thread:9
Thread:9
Thread:9
Thread:9
更改两个循环变量的时候This is ThreadTest总是出现在不同位置，我觉得应该都在最后输出，请假下为什么呢？

[fromtc]

说错了，应该是修改休眠时间或第二个循环变量的时候This is ThreadTest就在不同的位置出现，而代码中这个输出语句是在那个线程循环之后的呀，应该是在所有线程执行完才输出这句话的吧

[fromtc]

自己顶
大家快来说说啊