Joan,

If you are still around?!

I have declared a

private int count;

and added

count = ++count;
pw.print(count+": ");

to tofile() in order to put a question number in front of the slider
value and this seems to work OK. I also added "true" to the FileWriter
so as to not overwrite the data file.

I would now like to be able to display a series of images rather than
just the 2 so far ... I thought of using the incremented count value
for buttonpic3, buttonpic4 etc by writing (buttonpic + count) but this
does not work. Any thoughts? Some sort of loop needed?

Cheers

Geoff

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Container;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;

import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JSlider;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;

class Changes4 extends JFrame implements ChangeListener,
ActionListener {

   private JSlider scale = new JSlider(-20, +20, 0);
   private JLabel position = new JLabel("Set Position");
   private JButton nxtButton = new JButton("Next");
   private ImageIcon picIcon1 = new ImageIcon("pic1.jpg");
   private ImageIcon picIcon2 = new ImageIcon("pic2.jpg");
   private ImageIcon picIcon3 = new ImageIcon("pic3.jpg");

   private JButton buttonPic1 = new JButton(picIcon1);
   private JButton buttonPic2 = new JButton(picIcon2);
   private JButton buttonPic3 = new JButton(picIcon3);

   private JPanel myPanel;
   private static Changes4 egg;
   private Container contentArea;
   private BorderLayout myLayout;
   private JLabel labText;
   private int count = 0;

   public Changes4() {

       super("Slider");
       setSize(800, 600);
       setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
       setVisible(true);

       contentArea = getContentPane();
       myLayout = new BorderLayout();
       contentArea.setLayout(myLayout);

       scale.setMajorTickSpacing(10);
       scale.setMinorTickSpacing(5);
       scale.setPaintTicks(true);
       scale.setPaintLabels(true);

       scale.addChangeListener(this);

       labText = new JLabel(
               "Look at the picture and indicate on the slider how
you feel.");
       nxtButton.addActionListener(this);

       myPanel = new JPanel();
       myPanel.setBackground(Color.blue);
       myPanel.add(buttonPic1);

       JPanel panel2 = new JPanel();
       panel2.setBackground(Color.white);
       panel2.add(labText);

       JPanel panel3 = new JPanel();
       panel3.setBackground(Color.white);
       JLabel slidertext = new JLabel("-20 = Very Bad, +20 = Very
Good");
       panel3.add(slidertext);
       panel3.add(scale);
       panel3.add(nxtButton);

       contentArea.add(myPanel, BorderLayout.NORTH);
       contentArea.add(panel2, BorderLayout.CENTER);
       contentArea.add(panel3, BorderLayout.SOUTH);

       setContentPane(contentArea);
   }

   public void stateChanged(ChangeEvent event) {
       JSlider src = (JSlider) event.getSource();
       if (!src.getValueIsAdjusting())
           position.setText("Position is " + scale.getValue());
   }

   public void actionPerformed(ActionEvent event) {
       Object source = event.getSource();
       if (source == nxtButton) {
       tofile();
       }

       contentArea.remove(myPanel);

       myPanel = new JPanel();
       myPanel.setBackground(Color.blue);
       myPanel.add(buttonPic2);

       contentArea.add(myPanel, BorderLayout.NORTH);

       setContentPane(contentArea);

       contentArea.setVisible(true);
   }

   public void tofile() {
       try {
           FileWriter outfile = new FileWriter("data.txt",true);
           PrintWriter pw = new PrintWriter(outfile);

           count = ++count;
           
           pw.print(count+": ");
           pw.println(scale.getValue());
           pw.close();
       } catch (IOException e) {
           System.out.println(e);
       }
       // System.exit(0);
   }

   public static void main(String[] args) {
       egg = new Changes4();
   }
}

public void tofile() {
try {
FileWriter outfile = new FileWriter("data.txt", true);
PrintWriter pw = new PrintWriter(outfile);

count = ++count;
pw.print(count+": ");

pw.println(scale.getValue());
pw.close();
} catch (IOException e) {
System.out.println(e);
}