Question

Please help me with this Java exercise.

Class Exercise Java Swing 1. Create the following user interface: X Bicycle Exercise Customer Name: Number of days Model 1 Model 2 Model 3 Senior Citizen Member Total Compute

Requirements:

1. The user will enter name and number of days.

2. Choose a bike model and  a picture should be displayed for every model option.

3. User will have an option if he or she is a senior citizen or a member.

4. The user will enter compute button and the program will output the total.

5. The total is based on the following:

a. Model 1 is 14 dollars per day

b. Model 2 is 12 dollars per day

c. Model 3 is 10 dollars per day.

d. If the user rents for 6 to 10 days, a discount of 8% is given.

e. If the user rents for more than 10 days, a discount of 15 percent is given.

6. Provide validations for entries.

Answer 1

/*Java GUI program that allows user to enter
* the name of the customer and number of days
* as input text field values. Then select the model
* of the bicycle and then allows to select the check box
* and then allow to press compute button and then
* display a message box of the name, days and cost */
//BicycleExercise.java
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.ButtonGroup;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.JTextField;
import javax.swing.SwingConstants;
public class BicycleExercise extends JFrame
{
  
   private JTextField txtName=new JTextField(20);
   private JTextField txtDays=new JTextField(20);
   private JRadioButton rdModel1=new JRadioButton("Model1");
   private JRadioButton rdModel2=new JRadioButton("Model2");
   private JRadioButton rdModel3=new JRadioButton("Model3");
   private JCheckBox seniorCheckBox=new JCheckBox("Senior Citizen");
   private JCheckBox memberCheckBox=new JCheckBox("Member");
   private ImageIcon icon = new ImageIcon("model1.PNG");
   private JButton btnCompute = new JButton("Compute");
   private JLabel imgIcon=new JLabel();

   //main method
   public static void main(String[] args)
   {
       new BicycleExercise();
   }
   /*constructor to set up the window */
   public BicycleExercise()
   {
       setLayout(new BorderLayout());
       setTitle("Bicycle Exercise");
       setSize(600, 400);
       setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

       //panel to hold name and number of days
       JPanel topPanel=new JPanel();
       topPanel.setLayout(new GridLayout(2, 2,10,10));
       topPanel.add(new JLabel("Customer Name:"));
       topPanel.add((txtName));
       topPanel.add(new JLabel("Number of days"));
       topPanel.add(txtDays);
       add(topPanel ,BorderLayout.NORTH);

       //panel to hold radio buttons and check boxes
       JPanel centerPanel=new JPanel();
       centerPanel.setLayout(new GridLayout(2, 4));
       imgIcon.setPreferredSize(new Dimension(500, 500));
       imgIcon.setIcon(icon);
       centerPanel.add(imgIcon);
       ButtonGroup group=new ButtonGroup();
       group.add(rdModel1);
       group.add(rdModel2);
       group.add(rdModel3);  

       //add action listener to the radio buttons to update the model
       rdModel1.addActionListener(new RadioListener());
       rdModel2.addActionListener(new RadioListener());
       rdModel3.addActionListener(new RadioListener());

       centerPanel.add(rdModel1);
       centerPanel.add(rdModel2);
       centerPanel.add(rdModel3);      
       centerPanel.add(new JLabel());
       centerPanel.add(seniorCheckBox);
       centerPanel.add(memberCheckBox);         
       add(centerPanel ,BorderLayout.CENTER);

       //panel to hold total and compute button on bottom
       JPanel bottomPanel=new JPanel();
       bottomPanel.setLayout(new GridLayout(1, 2,10,10));
       bottomPanel.add(new JLabel("Total"),SwingConstants.CENTER);
      
       //add action listener to button to compute the cost
       btnCompute.addActionListener(new ButtonListener());
       bottomPanel.add(btnCompute);
       add(bottomPanel ,BorderLayout.SOUTH);      
       setVisible(true);
   }
   /*Inner class for the Radio buttons*/
   private class RadioListener implements ActionListener
   {
       //Override
       public void actionPerformed(ActionEvent ae)
       {
           JRadioButton rad=(JRadioButton)ae.getSource();
           if(rad==rdModel1)
           {
               imgIcon.setIcon(new ImageIcon("model1.PNG"));          
           }
           if(rad==rdModel2)
           {
               imgIcon.setIcon(new ImageIcon("model2.jpg"));          
           }
           if(rad==rdModel3)
           {
               imgIcon.setIcon(new ImageIcon("model3.jpg"));          
           }
       }
   }
   /*Inner class for the Button */
   private class ButtonListener implements ActionListener
   {
       //Override
       public void actionPerformed(ActionEvent ae)
       {
           final double DISCOUNT1=0.08;
           final double DISCOUNT2=0.15;
           double discount=0;
           final int MODEL1=14;
           final int MODEL2=12;
           final int MODEL3=10;
           double cost=0;

           try
           {
               String name=txtName.getText();
               int numDays=Integer.parseInt(txtDays.getText());
               //find the discount percent
               if(numDays>=6 && numDays<=10)
                   discount=DISCOUNT1;
               else if(numDays>10)
                   discount=DISCOUNT2;
               //find the user selected the radio button and calculate cost
               if(rdModel1.isSelected())
               {
                   cost=numDays*MODEL1-(numDays*MODEL1*discount);
               }
               else if(rdModel2.isSelected())
               {
                   cost=numDays*MODEL2-(numDays*MODEL2*discount);
               }
               else if(rdModel2.isSelected())
               {
                   cost=numDays*MODEL3-(numDays*MODEL3*discount);
               }
               //display the cost message
               JOptionPane.showMessageDialog(null,
                       "Name: "+name
                       +"\nNumber of Days: "+numDays
                       +"\nTotal cost,$ : "+cost,
                       "Total Cost",                   
                       JOptionPane.INFORMATION_MESSAGE);
           }
           catch (Exception e)
           {
               JOptionPane.showMessageDialog(null,
                       "Enter valid input",
                       "Error",                   
                       JOptionPane.ERROR_MESSAGE);
           }

       }

   }

}
------------------------------------------Sample Run#----------------------------------------

- х Bicycle Exercise Customer Name: Number of days Model1 Model2 Model3 Senior Citizen Member Total Compute

Enter name, days, select model2 and check member and click on compute

- Bicycle Exercise Customer Name: MARK Number of days 10 Model1 Model2 Model3 Total Cost i Name: MARK Number of Days: 10 Total cost$: 110.4 OK Senior Citizen Membe Total Compute