Part 2

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class Lab04Part2 extends JFrame {

   public boolean keepGoing = true;

   public JButton jbButton = new JButton("Start");

   public static void main(String[] args){
      new Lab04Part2();
   }

   public Lab04Part2(){
      setupWindow();

      InnerProgress r1 = new InnerProgress(1);
      InnerProgress r2 = new InnerProgress(2);

      this.setLayout(new GridLayout(0,1));
      this.add(jbButton);

      this.add(r1);
      this.add(r2);

      jbButton.addActionListener(new ActionListener(){
         public void actionPerformed(ActionEvent ae){
            if(keepGoing == false){
               keepGoing = true;
            }

           Thread t1 = new Thread(r1);
           Thread t2 = new Thread(r2);

           t1.start();
           t2.start();

            jbButton.setEnabled(false);
      Thread extra = new Thread(){
         public void run(){
            try{
               t1.join();
               t2.join();
            }catch(InterruptedException ie){System.out.println(ie);}
               jbButton.setEnabled(true);
            }};
            extra.start();


         }
      });
      this.setVisible(true);
   }




   public void setupWindow(){
      this.setTitle("Lab04Part2");
      this.pack();
      this.setLocationRelativeTo(null);
      this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

   }


class InnerProgress extends JPanel implements Runnable {

   public int line = 0;

   public JLabel jlOne = new JLabel();
   public JProgressBar jprogOne = new JProgressBar(0,80);

   public InnerProgress(int i){
      line = i;
      jlOne.setText("Progess " + line + ": ");
      this.add(jlOne);
      this.add(jprogOne);
      jprogOne.setStringPainted(true);
      jprogOne.setIndeterminate(true);

   }
   public void run(){
      jprogOne.setIndeterminate(false);
      jprogOne.setValue(0);
      for(int i = 0; i <= 80 && keepGoing == true; i++){
         double r = Math.random();

         double inMilli = r * 100;

         try{
         Thread.sleep((long)inMilli);
         }catch(InterruptedException ie){System.out.println("Interrupted" + ie);}

         jprogOne.setValue(i);
      }
      keepGoing = false;
      System.out.println("This is running thread " + line + ". Finishing in " + System.currentTimeMillis() + " milliseconds.");

   }


}



}