Java Slideshow in BlueJ...Help!

[MarkL410]

Hi,

I am completely new to Java and signed up for the forums because I am in serious need of assistance please...

I am trying to create an image slideshow in BlueJ...here is my code so far,

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

/**
 * Write a description of class SlideShow here.
 * 
 * @author (your name) 
 * @version (a version number or a date)
 */
public class SlideShow implements ActionListener
{
   private JFrame frame;
   private JLabel pictureLabel;
   private JTextField field;
   private JButton clickButton;
   private static final String PATH = "Pictures";
   
   
    /**
     * Constructor for objects of class SlideShow
     */
    public SlideShow()
    {
       makeFrame();
    }

    /**
     * An example of a method - replace this comment with your own
     * 
     * @param  y   a sample parameter for a method
     * @return     the sum of x and y 
     */
    private void makeFrame()
    {
        frame = new JFrame ("Slide Show");
        
        JMenuBar menubar = new JMenuBar();
        frame.setJMenuBar(menubar);
        
        JMenu fileMenu = new JMenu ("Select Picture");
        menubar.add(fileMenu);
        
        JMenuItem thisItem = new JMenuItem("Pic01.jpg");
        thisItem.addActionListener(this);
        fileMenu.add(thisItem);
        
        JMenuItem thatItem = new JMenuItem("Pic02.jpg");
        thatItem.addActionListener(this);
        fileMenu.add(thatItem);
        
        JMenuItem otherItem = new JMenuItem("Pic03.jpg");
        otherItem.addActionListener(this);
        fileMenu.add(otherItem);
        
        Container contentPane = frame.getContentPane();
        
        JLabel label = new JLabel("The World Cup's Greatest Players");
        
        pictureLabel = new JLabel();
        pictureLabel.setIcon(new ImageIcon(PATH + "Pic01.jpg"));
        
        
        clickButton = new JButton ("Change Picture");
        clickButton.addActionListener(this);

       
        
        frame.pack();
        frame.setVisible(true);
        
    }
    
    
    
 
    
    
        
}

I realise for the slideshow to work properly I need to add a timer, timercount and I am also going to create if possible a second class called main whereby the file can be opened using dos. I am completely stuck on where to go next, could somebody point me in the right direction?

Thanks.

[Norm]

create if possible a second class called main whereby the file can be opened using dos

main is not a good name for a class. Try a more descriptive name and upper case first letter.
What is "dos" and why do you want to use it?

What is the purpose of the timer and timercount?

[Eranga]

Do you want to rotate within the image list on a timer? Can you explain bit more, because in your code I cannot see any dynamic changes as your title talking about slide show.

[MarkL410]

Ok I have put in the code I was needing but a new problem has come up in that the pictures are not showing on the application. Here is the updated code...

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

/**
 * Write a description of class SlideShow here.
 * 
 * @author (your name) 
 * @version (a version number or a date)
 */
public class SlideShow implements ActionListener
{
   private JFrame frame;
   private JLabel pictureLabel;
   private JTextField field;
   private JButton clickButton;
   private static final String PATH = "Pictures";
   private int timerCount;
   private Timer myTimer;
   
   
    /**
     * Constructor for objects of class SlideShow
     */
    public SlideShow()
    {
       makeFrame();
       timerCount = 0;
       myTimer = new Timer(3000,this);
       myTimer.start();
    }

    /**
     * An example of a method - replace this comment with your own
     * 
     * @param  y   a sample parameter for a method
     * @return     the sum of x and y 
     */
    private void makeFrame()
    {
        frame = new JFrame ("Slide Show");
        
        JMenuBar menubar = new JMenuBar();
        frame.setJMenuBar(menubar);
        
        JMenu fileMenu = new JMenu ("Select Picture");
        menubar.add(fileMenu);
        
        JMenuItem thisItem = new JMenuItem("Pic01.jpg");
        thisItem.addActionListener(this);
        fileMenu.add(thisItem);
        
        JMenuItem thatItem = new JMenuItem("Pic02.jpg");
        thatItem.addActionListener(this);
        fileMenu.add(thatItem);
        
        JMenuItem otherItem = new JMenuItem("Pic03.jpg");
        otherItem.addActionListener(this);
        fileMenu.add(otherItem);
        
        Container contentPane = frame.getContentPane();
        contentPane.setLayout(new BorderLayout());
        
        JLabel label = new JLabel("The World Cup's Greatest Players");
        contentPane.add(label, BorderLayout.WEST);
        
        field = new JTextField(15);
        contentPane.add(field, BorderLayout.CENTER);
        
        pictureLabel = new JLabel();
        pictureLabel.setIcon(new ImageIcon(PATH + "Pic01.jpg"));
        contentPane.add(pictureLabel, BorderLayout.NORTH);
        clickButton = new JButton ("Change Picture");
        clickButton.addActionListener(this);
        contentPane.add(clickButton, BorderLayout.SOUTH);
        
        frame.pack();
        frame.setVisible(true);
        
    }
    
    public void actionPerformed(ActionEvent event)
    {
        if (event.getSource() == myTimer)
        {  timerCount++;
           if (timerCount > 9)
              timerCount = 0;
           changePicture("Pic01" + timerCount + ".jpg");
        }
        else if (event.getSource() == clickButton)
          changePicture(field.getText());
        else
          field.setText(event.getActionCommand());
       
        }
        
    public void changePicture(String pictureFileId)
    {
        pictureLabel.setIcon(new ImageIcon(PATH + pictureFileId));
    }

[Norm]

Add some debugging code to see if you are finding the image file and creating an image in changeImage()

[Eranga]

Yeah, did you debug the code?

pictureLabel = new JLabel();
        pictureLabel.setIcon(new ImageIcon(PATH + "Pic01.jpg"));

Did you get the correct path here?