interrupt 的用法？？

对这个程序的输出的问题
package thinkInJava;import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;import javax.swing.JApplet;
import javax.swing.JButton;
import javax.swing.JFrame;class Blocked extends Thread {
public synchronized void run() {
System.out.println("before wait ");
try {

wait(); // Blocks
} catch (InterruptedException e) {
System.out.println("InterruptedException");
}
System.out.println("Exiting run()");
}
}public class Interrupt extends JApplet {
private JButton interrupt = new JButton("Interrupt"); private Blocked blocked = new Blocked(); public  void init() {
add(interrupt);
interrupt.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
System.out.println("Button pressed");
if (blocked == null)
return;
Thread remove = blocked;
blocked = null; // to release it
System.out.println("aaaaaa");
remove.interrupt();
System.out.println("bbbbbbb");
}
});
blocked.start();
} public static void main(String[] args) {
Interrupt applet = new Interrupt();
JFrame aFrame = new JFrame("Interrupt");
aFrame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
aFrame.add(applet, BorderLayout.CENTER);
aFrame.setSize(200, 100);
applet.init();
applet.start();
aFrame.setVisible(true);
}
} // /:~
为何是结果是：
before wait 
Button pressed
aaaaaa
bbbbbbb
InterruptedException
Exiting run()
Button pressed而 不是
before wait 
Button pressed
aaaaaa
InterruptedException
Exiting run()
bbbbbbb
Button pressed