Question

Create a GUI application that allows the user to select a rate category (from a set of radio buttons), and enter the number of minutes of the call as a decimal into a text field. There should be separate Calculate Charges and Exit buttons implemented as a JPanel. Minutes Panel uses a 1X2 GridLayout. A dialog box should display the charge for the call. Implement LongDistance by extending JFrame and both MinutesPanel and RatePanel as separate classes that extend JPanel.

Answer 1

Answer:

Kindly note that, you're to replace "at" with shift 2 as the brainly text editor can't take the symbol

Explanation:

Below is the Java Swing implementation of the assignment.

=========================== LongDistance.java ====================================

import java.awt.GridLayout;

import javax.swing.*;

public class LongDistance extends JFrame{

 

  /**

  *

  */

  public static float rate;

  public static float minutes;

  public static float total;

 

  LongDistance(){

     

     

      RatePanel rp = new RatePanel();

     

      MinutesPanel mp = new MinutesPanel();

     

      ButtonsPanel bp = new ButtonsPanel();

     

      this.setLayout(new GridLayout(3, 1));

     

 

     

      this.add(rp);

      this.add(mp);

      this.add(bp);

             

      this.setDefaultCloseOperation(EXIT_ON_CLOSE);

      this.setSize(250, 250);

      this.setVisible(true);

  }

 

}

============================ RatePanel.java ==================================

import java.awt.Dimension;

import java.awt.GridLayout;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.BorderFactory;

import javax.swing.ButtonGroup;

import javax.swing.JPanel;

import javax.swing.JRadioButton;

import javax.swing.border.Border;

public class RatePanel extends JPanel implements ActionListener {

  /**

  *

  */

  private JRadioButton jr1, jr2, jr3;

  RatePanel(){

     

      Border panelBorder = BorderFactory.createTitledBorder("Select a Rate Category");

     

     

      jr1 = new JRadioButton("Daytime ($0.7) per minute");

      jr2 = new JRadioButton("Evening ($0.12) per minute");

      jr3 = new JRadioButton("Off-Peak ($0.05) per minute");

      ButtonGroup bg = new ButtonGroup();

     

      this.setLayout(new GridLayout(3,1));

      this.setBorder(panelBorder);

      this.setPreferredSize(new Dimension(800, 150));

     

      this.add(jr1);

      this.add(jr2);

      this.add(jr3);

     

      bg.add(jr1);

      bg.add(jr2);

      bg.add(jr3);

     

      jr1.addActionListener(this);

      jr2.addActionListener(this);

      jr3.addActionListener(this);

         

  }

  "at"Override

  public void actionPerformed(ActionEvent arg0) {

      // TODO Auto-generated method stub

     

      if(arg0.getSource() == jr1){

          LongDistance.rate = 0.07f;

      }

     

      if(arg0.getSource() == jr2){

          LongDistance.rate = 0.12f;

      }

     

      if(arg0.getSource() == jr3){

          LongDistance.rate = 0.05f;

      }

     

  }

}

=============================== MinutesPanel.java =============================

import java.awt.Dimension;

import java.awt.GridLayout;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.awt.event.KeyEvent;

import java.awt.event.KeyListener;

import javax.swing.*;

import javax.swing.border.Border;

import javax.swing.event.DocumentListener;

public class MinutesPanel extends JPanel implements KeyListener{

  JTextField jt;

 

  MinutesPanel(){

      Border panelBorder = BorderFactory.createTitledBorder("Time Of Call");

     

      this.setLayout(new GridLayout(1, 2));

     

      JLabel jl = new JLabel("Minutes: ");

      jt = new JTextField();

     

jt.setBounds(50,50,150,20);

      this.setPreferredSize(new Dimension(10, 10));

      this.setBorder(panelBorder);

      this.add(jl);

      this.add(jt);

     

      jt.addKeyListener(this);

 

     

     

     

  }

  "at"Override

  public void keyPressed(KeyEvent arg0) {

      // TODO Auto-generated method stub

     

  }

  "at"Override

  public void keyReleased(KeyEvent arg0) {

      // TODO Auto-generated method stub

      if(jt.getText() != "")

          LongDistance.minutes = Float.parseFloat(jt.getText());

  }

  "at"Override

  public void keyTyped(KeyEvent arg0) {

      // TODO Auto-generated method stub

     

     

  }

 

}

============================= ButtonsPanel.java ============================

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.JButton;

import javax.swing.JOptionPane;

import javax.swing.JPanel;

public class ButtonsPanel extends JPanel implements ActionListener{

  JButton calculate;

  JButton exit;

  ButtonsPanel(){

      calculate = new JButton("Calculate Charges");

      exit = new JButton("Exit");

     

      this.add(calculate);

      this.add(exit);

     

      calculate.addActionListener(this);

      exit.addActionListener(this);

     

  }

  "at"Override

  public void actionPerformed(ActionEvent arg0) {

      // TODO Auto-generated method stub

     

      if(arg0.getSource() == calculate){

                     

          System.out.println("r " + LongDistance.rate);

          System.out.println("m " + LongDistance.minutes);

         

          LongDistance.total = LongDistance.rate * LongDistance.minutes;

          JOptionPane.showMessageDialog(null, "Total Charges: " +LongDistance.total);

         

      }

     

      if(arg0.getSource() == exit){

          System.exit(0);

      }

  }

}

============================ App.java==============================

public class App {

  public static void main(String[] args) {

     

      LongDistance ld = new LongDistance();

     

  }

}

Check the output below