问一下，这里怎么会有两个线程》？

[love_li]

public class ThreadJoinTest
{
public static void main(String args[]) throws Excetion
{
int i=0;
Hello h=new Hello();

Thread t=new Thread(h);
t.setPriority(Thread.MAX_PRIORITY);
t.start();

System.out.println("Please stop saying Hello and say good morning!");
h.stopRunning();
while(i<5)
{
System.out.println("Good Morning"+i++);
}
}
}

class Hello implements Runnable
{
int i=0;
private boolean timeToQuit=false;
public void run()
{
while(!timeToQuit)
{
System.out.println("Hello"+i++);
try {
if(i%2==0)
Thread.sleep(10);
}catch(Exception e){}
public void stopRunning()
{
timeToQuit=true;
}
}
}


结果如下：

Hello0
Hello1
Hello2
Hello3
Please stop saying Hello and say good morning
Good Morning0
Good Morning1
Good Morning2
Good Morning3
Good Morning4

我看不出这个程序有两个线程，可是书上说用两个。能否帮我找一下答案？

[malligator]

嗯

不用Runnable/Thread就已经有一个主线程了呀

[R4_1314]

Hello0
Hello1
Hello2
Hello3
这是用线程打印出来的.
Please stop saying Hello and say good morning
Good Morning0
Good Morning1
Good Morning2
Good Morning3
Good Morning4
这是用主线程打印出来的结果
这样看看不出效果,你把t.setPriority(Thread.MAX_PRIORITY);和 h.stopRunning();
注释掉应该会看出结果了

[wfront]

public static void main(string[] args)
这个就会起动一个线程

[treeroot]

是这样的