Designing a Pizza-Ordering Program using JRadioButton - Java Swing

Java examples for Swing:JRadioButton

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Description

Designing a Pizza-Ordering Program using JRadioButton

Demo Code

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

import javax.swing.BorderFactory;
import javax.swing.ButtonGroup;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.border.Border;

public class Main extends JFrame {
  public static void main(String[] args) {
    new Main();/*from   ww  w.  j a va  2  s .co  m*/
  }

  private JButton buttonOK;
  private JRadioButton small, medium, large;

  private JCheckBox pepperoni, mushrooms, anchovies;

  public Main() {
    this.setSize(320, 200);
    this.setTitle("Order Your Pizza");
    this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    ButtonListener bl = new ButtonListener();

    JPanel mainPanel = new JPanel();

    JPanel sizePanel = new JPanel();
    Border b1 = BorderFactory.createTitledBorder("Size");
    sizePanel.setBorder(b1);

    ButtonGroup sizeGroup = new ButtonGroup();

    small = new JRadioButton("Small");
    small.setSelected(true);
    sizePanel.add(small);
    sizeGroup.add(small);

    medium = new JRadioButton("Medium");
    sizePanel.add(medium);
    sizeGroup.add(medium);

    large = new JRadioButton("Large");
    sizePanel.add(large);
    sizeGroup.add(large);

    mainPanel.add(sizePanel);

    JPanel topPanel = new JPanel();
    Border b2 = BorderFactory.createTitledBorder("Toppings");
    topPanel.setBorder(b2);

    pepperoni = new JCheckBox("Pepperoni");
    topPanel.add(pepperoni);

    mushrooms = new JCheckBox("Mushrooms");
    topPanel.add(mushrooms);

    anchovies = new JCheckBox("Anchovies");
    topPanel.add(anchovies);

    mainPanel.add(topPanel);

    buttonOK = new JButton("OK");
    buttonOK.addActionListener(bl);
    mainPanel.add(buttonOK);

    this.add(mainPanel);

    this.setVisible(true);
  }

  private class ButtonListener implements ActionListener {
    public void actionPerformed(ActionEvent e) {
      if (e.getSource() == buttonOK) {
        String tops = "";
        if (pepperoni.isSelected())
          tops += "Pepperoni\n";
        if (mushrooms.isSelected())
          tops += "Mushrooms\n";
        if (anchovies.isSelected())
          tops += "Anchovies\n";

        String msg = "You ordered a ";
        if (small.isSelected())
          msg += "small pizza with ";
        if (medium.isSelected())
          msg += "medium pizza with ";
        if (large.isSelected())
          msg += "large pizza with ";

        if (tops.equals(""))
          msg += "no toppings.";
        else
          msg += "the following toppings:\n" + tops;
        JOptionPane.showMessageDialog(buttonOK, msg, "Your Order", JOptionPane.INFORMATION_MESSAGE);

        pepperoni.setSelected(false);
        mushrooms.setSelected(false);
        anchovies.setSelected(false);
        small.setSelected(true);
      }
    }
  }
}

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