Vfrdtyky

I'm doing converter of distance for my project but how to put JButton in this code? I don't want JRadioButton to be listener.

I wanted to add 3 button that act as trigger to convert inches, miles and feet when user choose at the radio button,

I've tried so many times but its always come up with an error.

Here's the code:

import javax.swing.*;

import java.awt.event.*;

import java.awt.*;





public class MetricConverterWindow extends JFrame

{

   private JPanel panel;                  // A holding panel

   private JLabel messageLabel;           // A message to the user

   private JTextField kiloTextField;      // To hold user input

   private JRadioButton milesButton;      // To convert to miles

   private JRadioButton feetButton;       // To convert to feet

   private JRadioButton inchesButton;     // To convert to inches

   private ButtonGroup radioButtonGroup;  // To group radio buttons

   private final int WINDOW_WIDTH = 400;  // Window width

   private final int WINDOW_HEIGHT = 100; // Window height



   /**

      Constructor

   */



   public MetricConverterWindow()

   {



      setTitle("Metric Converter");





      setSize(WINDOW_WIDTH, WINDOW_HEIGHT);





      setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);





      buildPanel();





      add(panel);





      setVisible(true);

   }





   private void buildPanel()

   {



      messageLabel = new JLabel("Enter a distance in kilometers");



      kiloTextField = new JTextField(10);



      milesButton = new JRadioButton("Convert to miles");



      feetButton = new JRadioButton("Convert to feet");



      inchesButton = new JRadioButton("Convert to inches");



      // Group the radio buttons.

      radioButtonGroup = new ButtonGroup();

      radioButtonGroup.add(milesButton);

      radioButtonGroup.add(feetButton);

      radioButtonGroup.add(inchesButton);



      // Add action listeners to the radio buttons.

      milesButton.addActionListener(new RadioButtonListener());

      feetButton.addActionListener(new RadioButtonListener());

      inchesButton.addActionListener(new RadioButtonListener());



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

      panel = new JPanel();

      panel.add(messageLabel);

      panel.add(kiloTextField);

      panel.add(milesButton);

      panel.add(feetButton);

      panel.add(inchesButton);

   }



   private class RadioButtonListener implements ActionListener

   {

      public void actionPerformed(ActionEvent e)

      {

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

         String convertTo = ""; // The units we're converting to

         double result = 0.0;   // To hold the conversion



         // Get the kilometers entered.

         input = kiloTextField.getText();



         // Determine which radio button was clicked.

         if (e.getSource() == milesButton)

         {

            // Convert to miles.

            convertTo = " miles.";

            result = Double.parseDouble(input) * 0.6214;

         }

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

         {

            // Convert to feet.

            convertTo = " feet.";

            result = Double.parseDouble(input) * 3281.0;

         }

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

         {

            // Convert to inches.

            convertTo = " inches.";

            result = Double.parseDouble(input) * 39370.0;

         }



         // Display the conversion.

         JOptionPane.showMessageDialog(null, input + 

                  " kilometers is " + result + convertTo);

      }

   }



   public static void main(String args)

   {

      new MetricConverterWindow();

   }

}