//: c14:Interrupt.java
// From Thinking in Java, 2nd Edition
// Available at http://www.BruceEckel.com
// (c) Bruce Eckel 1999
// Copyright notice in Copyright.txt
// The alternative approach to using stop()
// when a thread is blocked
// <applet code=Interrupt width=200 height=100>
// </applet>
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

class Blocked extends Thread {
  public synchronized void run() {
    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() {
    Container cp = getContentPane();
    cp.setLayout(new FlowLayout());
    cp.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
          remove.interrupt();
        }
      });
    blocked.start();
  }
  public static void main(String[] args) {
    JApplet applet = new Interrupt();
    JFrame frame = new JFrame("Interrupt");
    frame.addWindowListener(
      new WindowAdapter() {
        public void windowClosing(WindowEvent e) {
          System.exit(0);
        }
      });
    frame.getContentPane().add(applet);
    frame.setSize(200,100);
    applet.init();
    applet.start();
    frame.setVisible(true);
  }
} ///:~