Question

Please write it in Java language

2. (Myinterface.java) The program description below was found waaaaay back in the archives of the Equinox history database. It is the specification for a simply "computer store storefront". Even though computer stores are now extinct, you find the idea charming and decide to use the specification as inspiration to write an interface for one of the Equinox systems. Read carefully: write your own GUI for one of the Equinox systems, drawing inspiration from the GUI below. Don't just change the JLabels, do something that is a bit creative and different from what is below. Every user or group should have something noticeably different. Your GUI should include labels, textboxes, panels, buttons, text areas AND radio buttons, checkboxes and, for full marks, an advanced component such as a menu. Your GUI should calculate something. Which Equinox system you choose to simulate is up to you. The LU Computer Store performs the following standard services (not the prices for the real store): Install Hard Drive - $25.00 • Install RAM - $15.00 • Virus Removal - $50.00 • Format Hard Drive - $80.00 Quote Hourly Labour - $10.00 The store also performs other hourly service and charges for parts and labor ($25 per hour). Create a GUI application that displays the total for the customer's visit to the LU Computer Store. Output should be displayed in a JOptionPane. Make use of JPanels in your GUI and use at least one Grid Layout. ***Although it is not shown below, add a set or radio buttons (below the check boxes?) to give the customer warranty options: - 1 year warranty ($30) -2 year warranty ($50) -Decline ($0)

Answer 1

Below is the solution:

code:

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;

import javax.swing.BorderFactory;
import javax.swing.ButtonGroup;
import javax.swing.GroupLayout;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.JTextField;
import javax.swing.LayoutStyle;
import javax.swing.WindowConstants;

public class ComputerStore extends javax.swing.JFrame {
   // Variables declaration - do not modify
   private JButton btnCalculate;
   private JButton btnExit;
   private ButtonGroup buttonGroup1;
   private JCheckBox chkFormatHardDrive;
   private JCheckBox chkInstallHardDrive;
   private JCheckBox chkInstallRam;
   private JCheckBox chkQuoteHourlyLabour;
   private JCheckBox chkVirusRemoval;
   private JLabel jLabel1;
   private JLabel jLabel2;
   private JPanel jPanel1;
   private JPanel jPanel2;
   private JPanel jPanel3;
   private JRadioButton jRadioButton1;
   private JRadioButton jRadioButton2;
   private JRadioButton jRadioButton3;
   private JTextField txtHourLabour;
   private JTextField txtPartCost;
   // declare the variable for the price
   private double formatHradDrive = 0;
   private double installHardDrive = 0;
   private double installRam = 0;
   private double quoteHourlyLabour = 0;
   private double virusRemoval = 0;
   private double warranty = 0;
   private double hourLabour = 0;
   private double partCost = 0;
   // End of variables declaration

   public ComputerStore() {
       super("LU Computer Store");
       initComponents();
   }

   /**
   * This method is called from within the constructor to initialize the form.
   * WARNING: Do NOT modify this code. The content of this method is always
   * regenerated by the Form Editor.
   */
   @SuppressWarnings("unchecked")
   // <editor-fold defaultstate="collapsed" desc="Generated Code">
   private void initComponents() {
       buttonGroup1 = new ButtonGroup();
       jPanel1 = new JPanel();
       chkInstallHardDrive = new JCheckBox();
       chkInstallRam = new JCheckBox();
       chkVirusRemoval = new JCheckBox();
       chkFormatHardDrive = new JCheckBox();
       chkQuoteHourlyLabour = new JCheckBox();
       jPanel2 = new JPanel();
       jLabel1 = new JLabel();
       jLabel2 = new JLabel();
       txtPartCost = new JTextField();
       txtHourLabour = new JTextField();
       btnExit = new JButton();
       btnCalculate = new JButton();
       jPanel3 = new JPanel();
       jRadioButton1 = new JRadioButton();
       jRadioButton2 = new JRadioButton();
       jRadioButton3 = new JRadioButton();

       setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

       jPanel1.setBorder(BorderFactory.createTitledBorder("Standard Services"));

       chkInstallHardDrive.setText("Install Hard Drive ($25.00)");

       chkInstallRam.setText("Install Ram ($15.00)");

       chkVirusRemoval.setText("Virus Removal ($50.00)");

       chkFormatHardDrive.setText("Foramat Hard Drive ($80.00)");

       chkQuoteHourlyLabour.setText("Quote Hourly Labour ($10.00)");

       GroupLayout jPanel1Layout = new GroupLayout(jPanel1);
       jPanel1.setLayout(jPanel1Layout);
       jPanel1Layout.setHorizontalGroup(jPanel1Layout.createParallelGroup(GroupLayout.Alignment.LEADING)
               .addGroup(jPanel1Layout.createSequentialGroup().addContainerGap()
                       .addGroup(jPanel1Layout.createParallelGroup(GroupLayout.Alignment.LEADING)
                               .addComponent(chkInstallHardDrive).addComponent(chkInstallRam)
                               .addComponent(chkVirusRemoval).addComponent(chkFormatHardDrive)
                               .addComponent(chkQuoteHourlyLabour))
                       .addContainerGap(102, Short.MAX_VALUE)));
       jPanel1Layout.setVerticalGroup(jPanel1Layout.createParallelGroup(GroupLayout.Alignment.LEADING)
               .addGroup(jPanel1Layout.createSequentialGroup().addContainerGap().addComponent(chkInstallHardDrive)
                       .addPreferredGap(LayoutStyle.ComponentPlacement.RELATED).addComponent(chkInstallRam)
                       .addPreferredGap(LayoutStyle.ComponentPlacement.RELATED).addComponent(chkVirusRemoval)
                       .addPreferredGap(LayoutStyle.ComponentPlacement.UNRELATED).addComponent(chkFormatHardDrive)
                       .addPreferredGap(LayoutStyle.ComponentPlacement.UNRELATED).addComponent(chkQuoteHourlyLabour)
                       .addContainerGap(37, Short.MAX_VALUE)));

       jPanel2.setBorder(BorderFactory.createTitledBorder("Hourly Service"));

       jLabel1.setText("Part Cost:");

       jLabel2.setText("Hour of Labour:");

       GroupLayout jPanel2Layout = new GroupLayout(jPanel2);
       jPanel2.setLayout(jPanel2Layout);
       jPanel2Layout.setHorizontalGroup(jPanel2Layout.createParallelGroup(GroupLayout.Alignment.LEADING)
               .addGroup(jPanel2Layout.createSequentialGroup().addContainerGap()
                       .addGroup(jPanel2Layout.createParallelGroup(GroupLayout.Alignment.LEADING).addComponent(jLabel1)
                               .addComponent(jLabel2))
                       .addPreferredGap(LayoutStyle.ComponentPlacement.RELATED, GroupLayout.DEFAULT_SIZE,
                               Short.MAX_VALUE)
                       .addGroup(jPanel2Layout.createParallelGroup(GroupLayout.Alignment.LEADING, false)
                               .addComponent(txtPartCost, GroupLayout.DEFAULT_SIZE, 167, Short.MAX_VALUE)
                               .addComponent(txtHourLabour))
                       .addContainerGap()));
       jPanel2Layout.setVerticalGroup(jPanel2Layout.createParallelGroup(GroupLayout.Alignment.LEADING)
               .addGroup(jPanel2Layout.createSequentialGroup().addGap(10, 10, 10)
                       .addGroup(jPanel2Layout.createParallelGroup(GroupLayout.Alignment.BASELINE)
                               .addComponent(jLabel1).addComponent(txtPartCost, GroupLayout.PREFERRED_SIZE,
                                       GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE))
                       .addPreferredGap(LayoutStyle.ComponentPlacement.RELATED)
                       .addGroup(jPanel2Layout.createParallelGroup(GroupLayout.Alignment.BASELINE)
                               .addComponent(jLabel2).addComponent(txtHourLabour, GroupLayout.PREFERRED_SIZE,
                                       GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE))
                       .addContainerGap(GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)));

       btnExit.setText("Exit");
       btnExit.addActionListener(new ActionListener() {
           public void actionPerformed(ActionEvent evt) {
               btnExitActionPerformed(evt);
           }
       });

       btnCalculate.setText("Calculate Charge");
       btnCalculate.addActionListener(new ActionListener() {
           public void actionPerformed(ActionEvent evt) {
               btnCalculateActionPerformed(evt);
           }
       });

       jPanel3.setBorder(BorderFactory.createTitledBorder("Warranty Option"));

       jRadioButton1.setText("2 Year Warranty ($50)");

       jRadioButton2.setText("1 Year Warranty ($30)");

       jRadioButton3.setText("Decline ($0)");

       GroupLayout jPanel3Layout = new GroupLayout(jPanel3);
       jPanel3.setLayout(jPanel3Layout);
       jPanel3Layout.setHorizontalGroup(jPanel3Layout.createParallelGroup(GroupLayout.Alignment.LEADING)
               .addGroup(jPanel3Layout.createSequentialGroup().addContainerGap()
                       .addGroup(jPanel3Layout.createParallelGroup(GroupLayout.Alignment.LEADING)
                               .addComponent(jRadioButton2).addComponent(jRadioButton1).addComponent(jRadioButton3))
                       .addContainerGap(GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)));
       jPanel3Layout.setVerticalGroup(jPanel3Layout.createParallelGroup(GroupLayout.Alignment.LEADING).addGroup(
               GroupLayout.Alignment.TRAILING,
               jPanel3Layout.createSequentialGroup().addContainerGap().addComponent(jRadioButton2)
                       .addPreferredGap(LayoutStyle.ComponentPlacement.RELATED).addComponent(jRadioButton1)
                       .addPreferredGap(LayoutStyle.ComponentPlacement.RELATED).addComponent(jRadioButton3)
                       .addContainerGap(13, Short.MAX_VALUE)));

       GroupLayout layout = new GroupLayout(getContentPane());
       getContentPane().setLayout(layout);
       layout.setHorizontalGroup(layout.createParallelGroup(GroupLayout.Alignment.LEADING).addGroup(layout
               .createSequentialGroup().addContainerGap()
               .addGroup(layout.createParallelGroup(GroupLayout.Alignment.LEADING)
                       .addGroup(layout.createSequentialGroup()
                               .addComponent(jPanel3, GroupLayout.DEFAULT_SIZE, GroupLayout.DEFAULT_SIZE,
                                       Short.MAX_VALUE)
                               .addContainerGap())
                       .addComponent(jPanel1, GroupLayout.DEFAULT_SIZE, GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                       .addComponent(jPanel2, GroupLayout.DEFAULT_SIZE, GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                       .addGroup(layout.createSequentialGroup().addComponent(btnCalculate)
                               .addPreferredGap(LayoutStyle.ComponentPlacement.RELATED, GroupLayout.DEFAULT_SIZE,
                                       Short.MAX_VALUE)
                               .addComponent(btnExit)))));
       layout.setVerticalGroup(layout.createParallelGroup(GroupLayout.Alignment.LEADING).addGroup(layout
               .createSequentialGroup().addGap(19, 19, 19)
               .addComponent(jPanel1, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE)
               .addPreferredGap(LayoutStyle.ComponentPlacement.RELATED)
               .addComponent(jPanel2, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE)
               .addPreferredGap(LayoutStyle.ComponentPlacement.RELATED, GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
               .addComponent(jPanel3, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE)
               .addGap(18, 18, 18).addGroup(layout.createParallelGroup(GroupLayout.Alignment.BASELINE)
                       .addComponent(btnCalculate).addComponent(btnExit))
               .addGap(14, 14, 14)));
       // add the button group to radio button warranty
       buttonGroup1.add(jRadioButton1);
       buttonGroup1.add(jRadioButton2);
       buttonGroup1.add(jRadioButton3);
       // every checkbox event to set the price for the each selected item
       chkInstallHardDrive.addItemListener(new ItemListener() { // USB check box checked event
           @Override
           public void itemStateChanged(ItemEvent e) {
               if (e.getStateChange() == ItemEvent.SELECTED) {
                   installHardDrive = 25.00;
               } else {
                   installHardDrive = 0;
               }
           }
       });
       //check for the format Hard Drive checkbox is checked
       chkFormatHardDrive.addItemListener(new ItemListener() { // USB check box checked event
           @Override
           public void itemStateChanged(ItemEvent e) {
               if (e.getStateChange() == ItemEvent.SELECTED) {
                   formatHradDrive = 80.00; //set the price
               } else {
                   installHardDrive = 0;
               }
           }
       });
       //check for the Install Ram checkbox is checked
       chkInstallRam.addItemListener(new ItemListener() { // USB check box checked event
           @Override
           public void itemStateChanged(ItemEvent e) {
               if (e.getStateChange() == ItemEvent.SELECTED) {
                   installRam = 15.00; //set the price
               } else {
                   installHardDrive = 0;
               }
           }
       });
       //check for the Quote Hourly Labour checkbox is checked
       chkQuoteHourlyLabour.addItemListener(new ItemListener() { // USB check box checked event
           @Override
           public void itemStateChanged(ItemEvent e) {
               if (e.getStateChange() == ItemEvent.SELECTED) {
                   quoteHourlyLabour = 10.00; //set the price
               } else {
                   installHardDrive = 0;
               }
           }
       });
       //check for the virus removal checkbox is checked
       chkVirusRemoval.addItemListener(new ItemListener() { // USB check box checked event
           @Override
           public void itemStateChanged(ItemEvent e) {
               if (e.getStateChange() == ItemEvent.SELECTED) {
                   virusRemoval = 50.00; //set the price
               } else {
                   installHardDrive = 0;
               }
           }
       });

       pack();

   }

   // calculate button event
   private void btnCalculateActionPerformed(ActionEvent evt) {
       //check for the warranty option
       if(jRadioButton1.isSelected()) {
           warranty = 30; //set the price
       }
       else if(jRadioButton2.isSelected()) {
           warranty = 50; //set the price
       }
       else {
           warranty = 0; //set the price
       }
       //take value from inputbox
       partCost = Double.valueOf(txtPartCost.getText());
       hourLabour = Double.valueOf(txtHourLabour.getText());
       //calculate the total
       Double total = formatHradDrive + installHardDrive + installRam + quoteHourlyLabour + virusRemoval + warranty
               + (hourLabour*25) + partCost;
       //show the message total charge
       JOptionPane.showMessageDialog(null,"Total Charges: $"+String.valueOf(total));
   }

   // exit button event
   private void btnExitActionPerformed(ActionEvent evt) {
       System.exit(0); // exit application
   }

   // main method
   public static void main(String args[]) {
       new ComputerStore().setVisible(true);
   }

}

sample output:

OOO LU Computer Store Standard Services Install Hard Drive ($25.00) Install Ram ($15.00) Virus Removal ($50.00) Foramat Hard Drive ($80.00) Quote Hourly Labour ($10.00) Hourly Service O Message Part Cost: Hour of Labour: 1.5 Total Charges: $137.5 ок Warranty Option 1 Year Warranty (530) 2 Year Warranty ($50) Decline (50) Calculate Charge Exit