线程中断

Question

import java.awt.Frame;
import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
public class ww 
{
public static void main(String[] args)
{
int i;
final Mythread m=new Mythread();
Frame f=new Frame();
f.setSize(555, 555);

f.setLayout(new GridLayout(13,5));
Button b=new Button("按钮");
Button c=new Button("按钮c");

f.add(b);
f.add(c);
f.setVisible(true);

f.addWindowListener(new WindowAdapter()
           {
                public void windowClosing (WindowEvent e)
                {
                 m.start();                         
                        System.out.print("   end");                   
                    
                }
           });
}
}class Mythread extends Thread
{
public void run()
{
for(int i=0;i<12;i++)
   {
try
{
Thread.sleep(332);
}
       catch (InterruptedException e) 
        {
                 e.printStackTrace();
            }
        if(i==4)
this.interrupt();
       
System.out.print(i);
    }
}
}
运行结果怎么会这样；
   end012345java.lang.InterruptedException: sleep interrupted
at java.lang.Thread.sleep(Native Method)
at Mythread.run(ww.java:52)
67891011
当i=4的时候线程不是应该中断吗，

Answer 1

当I=4时, 是中断了, 由于I==4时, 那线程处于SLEEP状态,  然后又调用了INTERRUPT()方法, 就会抛出InterruptedException, 
在I=5时, e.printStackTrace(); 会退出程序,
线程进行中断就是抛出异常