Help with this JButton Save code!

[Phil Robinson]

I have been working on this project for over a week, and with this last part, i am almost done! This is the only hard part left, but i just need some help with how to do it! I have to have a JButton, that when pressed, runs a save code that will save 2 different Strings. I know how JButtons work, but the only problem is that we have literally done nothing like this in my java class, so i was wondering if someone could help me out! There is other code involved with setting the ints "milesSum" and "fuelConsumedSum", but i alreayd have that all figured out, so i just need help with figuring out how to save them.

This first part is a JPanel that i have written already

  

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class SouthPanel extends JPanel {

    private JLabel totalMiles;
    private JLabel totalFuelConsumed;
    private JLabel saveToFile;
    private JLabel milesLabel;
    private JLabel fuelConsumedLabel;
    private JLabel saveLocation;

    private JButton bMiles;
    private JButton bGallons;
    private JButton bSave;
    
    private double milesTemp;
    private double milesTemp2;
    private double milesSum;
    private double fuelConsumedTemp;
    private double fuelConsumedTemp2;
    private double fuelConsumedSum;
    
    private JPanel totalPanel;
    
    private JLabel input;    
    public SouthPanel (JLabel inputLabel) {
        input = inputLabel;
        
        setBackground (Color.white);
        
        totalPanel = new JPanel ();
        totalPanel.setPreferredSize (new Dimension (410,80));
        totalPanel.setBorder (BorderFactory.createLineBorder (Color.lightGray,9));
        totalPanel.setBackground (Color.white);
        
        totalMiles = new JLabel ("Total Miles:");
        totalFuelConsumed = new JLabel ("Fuel Consumed:");
        saveToFile = new JLabel ("Save To File:");
        milesLabel = new JLabel ("0");
        fuelConsumedLabel = new JLabel ("0");
        saveLocation = new JLabel ("0");
        
        bMiles = new JButton ("Miles");
        bGallons = new JButton ("Gallons");
        bSave = new JButton ("Save");
        
        ButtonListener listener = new ButtonListener();
        bMiles.addActionListener (listener);
        bGallons.addActionListener (listener);
        
        totalPanel.setLayout (new GridLayout (3,3));
        totalPanel.add(totalMiles);
        totalPanel.add(milesLabel);
        totalPanel.add(bMiles);
        totalPanel.add(totalFuelConsumed);
        totalPanel.add(fuelConsumedLabel);
        totalPanel.add(bGallons);
        totalPanel.add(saveLocation);
        totalPanel.add(saveToFile);
        totalPanel.add(saveLocation);
        totalPanel.add(bSave);
        
        add (totalPanel);
    }
    public class ButtonListener implements ActionListener {  
        public void actionPerformed (ActionEvent event){    
            if (event.getSource () == bMiles){
                milesTemp = Double.parseDouble (input.getText());
                milesTemp2 = Double.parseDouble (milesLabel.getText());
                milesSum = milesTemp + milesTemp2;
                milesLabel.setText ("" + milesSum);
                input.setText ("");
                
            }
            if (event.getSource () == bGallons) {
                fuelConsumedTemp = Double.parseDouble (input.getText());
                fuelConsumedTemp2 = Double.parseDouble (fuelConsumedLabel.getText());
                fuelConsumedSum = fuelConsumedTemp + fuelConsumedTemp2;
                fuelConsumedLabel.setText ("" + fuelConsumedSum);
                input.setText ("");
                
            }
        }
    }
}

  

and then this is the "suggested" code that my teacher says we have to adjust to make is save the "milesSum" and the "fuelConsumedSum"

 

    private void saveToFile( )
    {
        int length = fileNameLabel.getText( ).length( );
        String filename = "..\\" + fileNameLabel.getText( ).substring(1, length-1);
        try
        { 
            FileWriter writer = new FileWriter( filename, true );
            writer.write( “1, 2, 3, 4” );  //  THIS LINE-OF-CODE NEEDS TO BE REPLACED!!!

            writer.write( "\r\n"  );         // Use "\r\n" to mark end-of-line 
                                                                  //            within files stored on Windows.
            writer.close( );
        } 
        catch( IOException e )
        {
            System.out.println( "Error occured while opening the file: " + filename );
        }        
    }


   

I would really appreciate it if anyone could help me out! Thanks!

[pete stein]

Phil Robinson wrote:
and then this is the "suggested" code that my teacher says we have to adjust to make is save the "milesSum" and the "fuelConsumedSum"
....
I would really appreciate it if anyone could help me out! Thanks!

So what modifications have you tried, and what is your code attempt doing?