Payment program question error??????

From: do (do_at_aol.com)
Date: 02/27/04 

Date: Thu, 26 Feb 2004 15:46:39 -0800

This is direction: Modifying the calculateJButtonActionPerformed method.
Modify the if statement

that starts in line 217 to check if the user has not entered a name and/or

selected any JCheckBoxes. Also add code to the
calculateJButtonActionPerformed

method (starting in line 252) that determines whether the new JCheckBoxes

have been selected. This can be done using if statements that are similar to
the ones

already in the method. Use the if statements to update the bill amount. The
bill

amount should be displayed in the totalPriceJTextField with the format

"$0.00".

//Source Code

// Exercise 5 DentalPayment.java
// This application calculates the total cost of the bill for a
// patient at a dental office.
import java.awt.*;
import java.awt.event.*;
import java.text.*;
import javax.swing.*;

public class DentalPayment extends JFrame
{
   // JLabel that displays header on application window
   private JLabel dentalPaymentFormJLabel;

   // JLabel and JTextField for patient name
   private JLabel patientNameJLabel;
   private JTextField patientNameJTextField;

   // JCheckBox and JLabel for cleaning
   private JCheckBox cleaningJCheckBox;
   private JLabel cleaningPriceJLabel;

   // JCheckBox and JLabel for cavity filling
   private JCheckBox cavityFillingJCheckBox;
   private JLabel cavityFillingPriceJLabel;

   // JCheckBox and JLabel for X-Ray
   private JCheckBox xRayJCheckBox;
   private JLabel xRayPriceJLabel;

   // JCheckBox and JLabel for fluoride
   private JCheckBox fluorideJCheckBox;
   private JLabel fluoridePriceJLabel;

   // JCheckBox and JLabel for root canal
   private JCheckBox rootCanalJCheckBox;
   private JLabel rootCanalPriceJLabel;

   // JCheckBox, JLabel and JTextField for other services
   private JCheckBox otherJCheckBox;
   private JLabel otherPriceJLabel;
   private JTextField otherPriceJTextField;

   // JLabel and JTextField for total fee
   private JLabel totalJLabel;
   private JTextField totalJTextField;

   // JButton to initiate calculation of fee
   private JButton calculateJButton;

   // no-argument constructor
   public DentalPayment()
   {
      createUserInterface();
   }

   // create and position GUI components; register event handlers
   private void createUserInterface()
   {
      // get content pane for attaching GUI components
      Container contentPane = getContentPane();

      // enable explicit positioning of GUI components
      contentPane.setLayout( null );

      // set up dentalPaymentFormJLabel
      dentalPaymentFormJLabel = new JLabel();
      dentalPaymentFormJLabel.setBounds( 19, 19, 235, 28 );
      dentalPaymentFormJLabel.setText( "Dental Payment Form" );
      dentalPaymentFormJLabel.setFont(
         new Font( "Default", Font.PLAIN, 22 ) );
      dentalPaymentFormJLabel.setHorizontalAlignment(
         JLabel.CENTER );
      contentPane.add( dentalPaymentFormJLabel );

      // set up patientNameJLabel
      patientNameJLabel = new JLabel();
      patientNameJLabel.setBounds( 19, 65, 91, 21 );
      patientNameJLabel.setText( "Patient name:" );
      contentPane.add( patientNameJLabel );

      // set up patientNameJTextField
      patientNameJTextField = new JTextField();
      patientNameJTextField.setBounds( 132, 65, 117, 21 );
      contentPane.add( patientNameJTextField );

      // set up cleaningJCheckBox
      cleaningJCheckBox = new JCheckBox();
      cleaningJCheckBox.setBounds( 16, 112, 140, 24 );
      cleaningJCheckBox.setText( "Cleaning" );
      contentPane.add( cleaningJCheckBox );

      // set up cleaningPriceJLabel
      cleaningPriceJLabel = new JLabel();
      cleaningPriceJLabel.setBounds( 211, 112, 38, 24 );
      cleaningPriceJLabel.setText( "$35" );
      cleaningPriceJLabel.setHorizontalAlignment( JLabel.RIGHT );
      contentPane.add( cleaningPriceJLabel );

      // set up cavityFillingJCheckBox
      cavityFillingJCheckBox = new JCheckBox();
      cavityFillingJCheckBox.setBounds( 16, 144, 140, 24 );
      cavityFillingJCheckBox.setText( "Cavity Filling" );
      contentPane.add( cavityFillingJCheckBox );

      // set up cavityFillingPriceJLabel
      cavityFillingPriceJLabel = new JLabel();
      cavityFillingPriceJLabel.setBounds( 211, 144, 38, 24 );
      cavityFillingPriceJLabel.setText( "$150" );
      cavityFillingPriceJLabel.setHorizontalAlignment(
         JLabel.RIGHT );
      contentPane.add( cavityFillingPriceJLabel );

      // set up xRayJCheckBox
      xRayJCheckBox = new JCheckBox();
      xRayJCheckBox.setBounds( 16, 178, 140, 24 );
      xRayJCheckBox.setText( "X-Ray" );
      contentPane.add( xRayJCheckBox );

      // set up xRayPriceJLabel
      xRayPriceJLabel = new JLabel();
      xRayPriceJLabel.setBounds( 211, 178, 38, 24 );
      xRayPriceJLabel.setText( "$85" );
      xRayPriceJLabel.setHorizontalAlignment( JLabel.RIGHT );
      contentPane.add( xRayPriceJLabel );

      // set up fluorideJCheckBox
      fluorideJCheckBox = new JCheckBox();// Line 127
      fluorideJCheckBox.setBounds(16,210,140,24);
      fluorideJCheckBox.setText( "Fluoride" );
      contentPane.add( fluorideJCheckBox );

      // set up fluoridePriceJLabel
      fluoridePriceJLabel = new JLabel();
      fluoridePriceJLabel.setBounds( 211, 210, 38, 24 );//Line 134
      fluoridePriceJLabel.setText("$50");
      fluoridePriceJLabel.setHorizontalAlignment( JLabel.RIGHT );
      contentPane.add( fluoridePriceJLabel );

      // set up rootCanalJCheckBox
      rootCanalJCheckBox = new JCheckBox();//Line 140
      rootCanalJCheckBox.setBounds(16,242,140,24);
      rootCanalJCheckBox.setText("Root Canal");
      contentPane.add( rootCanalJCheckBox );

      // set up rootCanalPriceJLabel
      rootCanalPriceJLabel = new JLabel();
      rootCanalPriceJLabel.setBounds( 211, 242, 38, 24 );//Line 148
      rootCanalPriceJLabel.setText("$225");
      rootCanalPriceJLabel.setHorizontalAlignment( JLabel.RIGHT );
      contentPane.add( rootCanalPriceJLabel );

      // set up otherJCheckBox
      otherJCheckBox = new JCheckBox();//line 153
      otherJCheckBox.setBounds(16,274,140,24);
      otherJCheckBox.setText("Other");
      contentPane.add( otherJCheckBox );

      // set up otherPriceJLabel
      otherPriceJLabel = new JLabel();//Line 159
      otherPriceJLabel .setBounds(206,274,32,24);
      otherPriceJLabel .setText("$");
      contentPane.add( otherPriceJLabel );

      // set up otherPriceJTextField
      otherPriceJTextField = new JTextField();//line 165
      otherPriceJTextField.setBounds(214,274,34,24);
      otherPriceJTextField.setHorizontalAlignment( JLabel.RIGHT );
      contentPane.add( otherPriceJTextField );

      // set up totalJLabel
      totalJLabel = new JLabel();
      totalJLabel.setBounds( 144, 314, 41, 21 );
      totalJLabel.setText( "Total:" );
      contentPane.add( totalJLabel );

      // set up totalJTextField
      totalJTextField = new JTextField();
      totalJTextField.setBounds( 192, 314, 56, 21 );
      totalJTextField.setEditable( false );
      totalJTextField.setHorizontalAlignment( JTextField.CENTER );
      contentPane.add( totalJTextField );

      // set up calculateJButton
      calculateJButton = new JButton();
      calculateJButton.setBounds( 155, 346, 94, 24 );
      calculateJButton.setText( "Calculate" );
      contentPane.add( calculateJButton );
      calculateJButton.addActionListener(

         new ActionListener() // anonymous inner class
         {
            // event handler called when user clicks calculateJButton
            public void actionPerformed( ActionEvent event )
            {
               calculateJButtonActionPerformed( event );
            }

         } // end anonymous inner class

      ); // end call to addActionListener

      // set properties of application's window
      setTitle( "Dental Payment" ); // set title bar string
      setSize( 272, 409 ); // set window size
      setVisible( true ); // display window

   } // end method createUserInterface

   // calculate cost of patient's visit
   private void calculateJButtonActionPerformed( ActionEvent event )
   {
      // get patient's name
      String patient = patientNameJTextField.getText();

      // Line 216 display error message if no name entered or no box
selected
      if ( ( patient.equals( "" ) ) ||
         ( !cleaningJCheckBox.isSelected() &&
         !cavityFillingJCheckBox.isSelected() &&
         !xRayJCheckBox.isSelected() ) )
      {
         // display error message
         JOptionPane.showMessageDialog( null,
            "Please enter a name and check at least one item.",
            "Missing information", JOptionPane.WARNING_MESSAGE );
      }
      else // otherwise, do calculations
      {
         double total = 0.0; // sum of all services provided

         // if patient had a cleaning
         if ( cleaningJCheckBox.isSelected() )
         {
            total += 35; // add 35 to total
         }

         // if patient had cavity filled
         if ( cavityFillingJCheckBox.isSelected() )
         {
            total += 150; // add 150 to total
         }

         // if patient had x-ray taken
         if ( xRayJCheckBox.isSelected() )
         {
            total += 85; // add 85 to total
         }

         // Line 252 if patient had fluoride cleaning
         if ( fluorideJCheckBox.isSelected() )
            {
               total += 50; // add 50 to total
         }

   // if patient had root canal
   if ( rootCanalJCheckBox.isSelected() )
            {
               total += 225; // add 225 to total
         }

   // if patient had other service performed
   if ( otherJCheckBox.isSelected() )
               {
                  total += ; // add 50 to total ------ ###ERROR###
         }

         // specify display format
         DecimalFormat dollars = new DecimalFormat( "$0.00" );

         // display total
         totalJTextField.setText( dollars.format( total ) );

      } // end else

   } // end method calculateJButtonActionPerformed

   // main method
   public static void main( String[] args )
   {
      DentalPayment application = new DentalPayment();
      application.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );

   } // end method main

} // end class DentalPayment

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