JOptionpane Problem

Question

Hey all
I have a query on the following code i hope some one can help with. In the following code when it executes a frame is displayed with three buttons, when you click the first button it brings up an JOptionpane which is all working fine its just the System.exit(0) i cant seem to get it to work. I dont know where to put in in realtion the switch
Thanks for all help
Ambrose
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import java.io.*;
public class Switching extends JFrame implements ActionListener
     private JTextArea ta1;
     private JButton b1;
     private JButton b2;
     private JButton b3;
     private JLabel l1;
     //private JTextField t1;
     double number1;
     double number2;
     int productId = 1;
     double product1 = 0, product2 = 0, product3 = 0, product4 = 0, product5 = 0;
     public Switching(String str)
          super(str);
         //Container need to hold all the components
         Container c = getContentPane();
         c.setLayout(null);
          //Size and location
          setSize(507,550);
          setLocationRelativeTo(null);
          //Declared
          b1 = new JButton ("Start the Application");
          b2 = new JButton ("Print");
          b3 = new JButton ("Exit Application");
          ta1 = new JTextArea (5, 5);
          //t1 = new JTextField (5);
        //Scroll Pane needed for the text area
            JScrollPane scrollPane =  new JScrollPane(ta1,
        JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
        JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
        //Label added
        l1 = new JLabel(
        "Mail order House", SwingConstants.CENTER );
        //l7.setForeground( colorValues[ 0 ] );
           l1.setFont(
        new Font( "Comic Sans MS", Font.BOLD, 40 ) );
        //Components added to the container
        c.add (b1);
        c.add (b2);
        c.add (b3);
        c.add (scrollPane);
        c.add (l1);
        //c.add (t1);
        //Tool tips for accessibility options
        b1.setToolTipText ("Click to Calculate Start the Program");
          ta1.setText("Please use the Button Calculate to Interest Rates");
        //Locations of all the variables
        b1.setBounds (165, 390, 185, 25);
        b2.setBounds (165, 440, 185, 25);
        b3.setBounds (165, 490, 185, 25);
        //t1.setBounds (10, 120, 100, 25);
        scrollPane.setBounds (10, 170, 300, 100);
        l1.setBounds (36, 45, 465, 40);
        //Action Listener added to the buttons
        b1.addActionListener(this);
        b2.addActionListener(this);
        b3.addActionListener(this);
     public void actionPerformed( ActionEvent e )
                 //Target Source Needed
                 Object Target = e.getSource();
       if ( Target ==b1)
                 while (productId != 0)
                      String inputString = JOptionPane.showInputDialog
                      ("Enter product number ( 1-5 ) ( 0 to stop ):" );    
                      //String inputString = JOptionPane.showInputDialog( "Enter first integer:" );
                      productId = Integer.parseInt( inputString );
                      /*System.exit( 0 );*/ 
                 if ( productId >= 1 && productId <= 5 )    
                    String inputString1 = JOptionPane.showInputDialog( "Enter quantity sold:" );
                  int quantity = Integer.parseInt( inputString1 );        
                  switch ( productId )
                          case 1: product1 += quantity * 2.98; 
                            break;     
                         case 2: product2 += quantity * 4.50;   
                           break;      
                         case 3: product3 += quantity * 9.98;          
                               break;          
                        case 4: product4 += quantity * 4.49;            
                          break;        
                        case 5: product5 += quantity * 6.87;    
                          break;      
              else if ( productId != 0 )
                       String output = "Incorrect Number Entered\n Please Enter Again ! ";
                    JOptionPane.showMessageDialog(null, output, "Attempt One ",
                    JOptionPane.WARNING_MESSAGE);
                 if ( Target == b2)
                      System.out.println("ee");     
                      ta1.setText("");
                      ta1.setText("Product One:"+"    "+product1 +
                      "\nProduct Two:"+"    "+product2 +
                      "\nProduct Three: "+"  "+product3 +
                      "\nProduct Four:"+"    "+product4 +
                      "\nProduct Five:"+"    "+product5);
     public static void main ( String args [])
          //Create an new Instance of the Form
          Switching In = new Switching("Shop Form");
          //In.setDefaultLookAndFeelDecorated(true);
          In.show();
}

Answer 1

Add something like
if (target == b3) {
    System.exit(0);
}To your ActionListener. Make sure it's outside of the other if statements. Also, you can use JFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE) to have the application exit when a user closes your window using the normal OS method (the X in windows).