// <applet code=Interrupt width=400 height=200> </applet>
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import com.bruceeckel.swing.*;

public class Interrupt extends JApplet {
   private JTextField txt = new JTextField(30);
   private JButton 
       suspendB = new JButton("Suspend"),
       interruptB = new JButton("Interrupt");

   private Suspendable suspendableThread = new Suspendable();

   class Suspendable extends Thread implements Runnable {
      private int count = 0;
      private boolean suspendedFlag = false;
      public Suspendable() { 
         start(); 
      }

      public synchronized void funSuspend() {
         suspendedFlag = true;
      }

      public synchronized void funInterrupt() {
         suspendedFlag = false;
         interrupt();
      }

      public void run() {
         while (true) {
            txt.setText("Count: " + Integer.toString(count++));
            synchronized (this) {
               if(suspendedFlag) {
                  try{
		     txt.setText("Suspend Button is ON: wait()"); 
                     wait();
                  } 
                  catch(InterruptedException e) {
                     txt.setText("Interrupt Button is ON: "+ e);
                     System.err.println("wait Interrupted "+ e);
                  }
               }
            }// synch
            try{
               sleep(2000);
            } 
            catch(InterruptedException e) {
               System.err.println("sleep(): Interrupted " + e);
            }
         }//true
      }//run
   }//thread
   public void init() {
      Container cp = getContentPane();
      cp.setLayout(new FlowLayout());
      cp.add(txt);

      suspendB.addActionListener( new ActionListener() {
         public 
             void actionPerformed(ActionEvent e) {
                suspendableThread.funSuspend();
                suspendB.setEnabled(false);
                suspendB.setBackground(Color.red);
                interruptB.setEnabled(true);
                interruptB.setBackground(Color.green);
         }
      }
      );
      cp.add(suspendB);
      suspendB.setEnabled(true);
      suspendB.setBackground(Color.green);

      interruptB.addActionListener( new ActionListener() {
         public 
             void actionPerformed(ActionEvent e) {
                suspendableThread.funInterrupt();
                suspendB.setEnabled(true);
                suspendB.setBackground(Color.green);
                interruptB.setEnabled(false);
                interruptB.setBackground(Color.red);
         }
      }
      );
      cp.add(interruptB);
      interruptB.setEnabled(false);
      interruptB.setBackground(Color.red);
   }
   public static void main(String[] args) {
      Console.run(new Interrupt(), 400, 200);
   }
}//JApplet