Long Distance Calls A long-distance provider charges the following rates for tele...

Program :

import javax.swing.*;

import java.awt.event.*;

import java.awt.*;

class LongDistancecall extends JFrame

{

private JPanel panel; // A holding panel

private JLabel messageLabel; // A message to the user

private JTextField minutesTextField;

// To hold user input

private JRadioButton DayButton;

private JRadioButton EveningButton;

private JRadioButton Off_peakButton;

private ButtonGroup radioButtonGroup;

// To group radio buttons

private final int WINDOW_WIDTH = 250; // Window width

private final int WINDOW_HEIGHT = 250;

// Window height

/* Constructor */

public LongDistancecall()

{

// Set the title.

setTitle("Long Distance calls");

// Set the size of the window.

setSize(WINDOW_WIDTH, WINDOW_HEIGHT);

// Specify an action for the close button.

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

// Build the panel and add it to the frame.

buildPanel();

// Add the panel to the frame's content pane.

add(panel);

// Display the window.

setVisible(true);

}

/**

The buildPanel method adds a label, text field, and

and three buttons to a panel.

*/

private void buildPanel()

{

// Create the label, text field, and radio buttons.

messageLabel = new

JLabel(" Enter number of minutes ");

minutesTextField = new JTextField(10);

DayButton = new JRadioButton("Day Time");

EveningButton = new JRadioButton(" Evening Time");

Off_peakButton = new JRadioButton("Off-peak");

// Group the radio buttons.

radioButtonGroup = new ButtonGroup();

radioButtonGroup.add(DayButton);

radioButtonGroup.add(EveningButton);

radioButtonGroup.add(Off_peakButton);

// Add action listeners to the radio buttons.

DayButton.addActionListener

(new RadioButtonListener());

EveningButton.addActionListener

(new RadioButtonListener());

Off_peakButton.addActionListener

(new RadioButtonListener());

// Create a panel and add the components to it.

panel = new JPanel();

panel.add(messageLabel);

panel.add(minutesTextField);

panel.add(DayButton);

panel.add(Off_peakButton);

}

/**

Private inner class that handles the event when

the user clicks one of the radio buttons.

*/

private class RadioButtonListener

implements ActionListener

{

public void actionPerformed(ActionEvent e)

{

String input; // To hold the user's input

double result = 0.0; // To hold the conversion

input = minutesTextField.getText();

// Determine which radio button was clicked.

if (e.getSource() == DayButton)

{

result = Double.parseDouble(input) * 0.07;

}

else if (e.getSource() == EveningButton)

{

result = Double.parseDouble(input) * 0.12;

}

else if (e.getSource() == Off_peakButton)

{

result = Double.parseDouble(input) * 0.05;

}

// Display the conversion.

JOptionPane.showMessageDialog

(null," Call charges is: $ " + result );

}

}

public static void main(String[] args)

{

new LongDistancecall();

}

}

Sample output:

Run1:

Run2: