Thread: How to display a button with an image on it?

Hello guys

Below code mean to display a button with an image on it, the image is real in my computer, but it only displays a blank button. Do you know why?

Many thanks

package brainydraw;
 
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
 
public class PictureButton extends JFrame
{
 
    public PictureButton()
    {
        setSize(200, 200);
        setLocation(200, 200);
 
        Icon icon = new ImageIcon("Poppy.Jpg");
        JButton button = new JButton(icon);
        button.addActionListener(new ActionListener()
        {
 
            public void actionPerformed(ActionEvent ae)
            {
                System.out.println("guess what?");
            }
        });
 
        Container content = getContentPane();
        content.setLayout(new FlowLayout());
        content.add(button);
    }
 
    public static void main(String[] args)
    {
        JFrame f = new PictureButton();
        f.addWindowListener(new WindowAdapter()
        {
 
            public void windowClosing(WindowEvent we)
            {
                System.exit(0);
            }
        });
        f.setVisible(true);
  }
}

try this:

Icon icon = new ImageIcon(getClass().getResource("Poppy.jpg"));

Originally Posted by relixus

try this:

Icon icon = new ImageIcon(getClass().getResource("Poppy.jpg"));

Hi relixus

Thank you very much for your advice, I tried to replace "Icon icon = new ImageIcon("Poppy.jpg")" with yours "Icon icon = new ImageIcon(getClass().getResource("Poppy.jpg"))", then ran it again, now it is not even showing the frame with the blank button?
Any more thought?

The JVM most likely cannot find the image because it isn't where you said it is. In your first code listing, try using the full path to the image.

Do you have to do getClass().getResource(Image title)?

Why not just

ImageIcon icon = new ImageIcon("Poppy.jpg");

?

As long as the file is in the same directory as your program.

at worst, why not

ImageIcon icon = new ImageIcon(code project path +"/" +"images/Poppy.jpg");

or even just

ImageIcon icon = new ImageIcon(code project path +"/" +"Poppy.jpg");

Originally Posted by javapenguin

Do you have to do getClass().getResource(Image title)?

Why not just...

ImageIcon icon = new ImageIcon("Poppy.jpg");

Try packaging your application and running it on a different computer. Using getResource allows you to package the app and images into a single jar. Relying on full paths is not very portable from one computer to the next, and in many cases will break immediately.

Originally Posted by copeg

Try packaging your application and running it on a different computer. Using getResource allows you to package the app and images into a single jar. Relying on full paths is not very portable from one computer to the next, and in many cases will break immediately.

So how would I get it to work on both my computer and another computer? Would I have to import a jar file?

when you compile your project into a jar file the image for your button will be included inside the jar file, and you will have problems referencing to it directly, u have to use getClass().getResource() to use those resources inside your jar file.

Originally Posted by ice

Hi relixus

Thank you very much for your advice, I tried to replace "Icon icon = new ImageIcon("Poppy.jpg")" with yours "Icon icon = new ImageIcon(getClass().getResource("Poppy.jpg"))", then ran it again, now it is not even showing the frame with the blank button?
Any more thought?

is poppy.jpg in the same directory as your java file? u should put them in the same folder.

How to Use Icons (The Java™ Tutorials > Creating a GUI With JFC/Swing > Using Swing Components)

db

Thank you very much all of you, I presumed that the location of image file didn't matter..., now it displays all good.