JButton isn't displaying Icon image in GUI

Question

I'm trying to display a .png picture using a GUI. But I'm having trouble with the pictures displaying. I think I've isolated where I'm messing up in my instructions but can't seem to find a working solution.

I am told in my instructions to...

• Set the title to Lab Button
• Create two local variables of type Icon: image1 and image2. Initialize them with a new ImageIcon base on Image1 and Image2 - like this: Icon image1 = new ImageIcon(getClass().getResource("Image1.png"));
• Initialize the field clickImage with a new ImageIcon that is based on Image3
• Initialize the field imgButton with a new JButton that accepts image1 as the only argument
• Call the method setRolloverIcon on imgButton and pass image2 as roll-over icon
• Add the imgButton to this (ImageButton, which is a JFrame)

It seems like I need to create a method to initialize imgButton. But if I did that wouldn't I need to create a new variable for each Icon image? For instance

imgButton = new JButton(image1);
final JButton imgButton2 = new JButton(image2);
final JButton imgButton3 = new JButton(image3);

Any help that I can get would be very appreciated. Thanks.

package ImageButton.Downloads;

import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;

public class ImageButton extends JFrame
{


    private final JButton imgButton;
    private final Icon clickImage;

    public ImageButton() 
    {


        JFrame frame = new JFrame();
        frame.setTitle("Lab Button");

        Icon image1 = new ImageIcon(getClass().getResource("Image1.png"));
        Icon image2 = new ImageIcon(getClass().getResource("Image2.png"));
        clickImage = new ImageIcon(getClass().getResource("Image3.gif"));

        imgButton = new JButton(image1);

        imgButton.setRolloverIcon(image2);



    }


}

package ImageButton.Downloads;


import javax.swing.JFrame;

public class ImageButtonApp 
{

    public ImageButtonApp() 
    {
        // TODO Auto-generated constructor stub
    }

    public static void main(String[] args) 
    {
        ImageButton imageButton = new ImageButton();

        imageButton.setSize(660, 660);
        imageButton.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        imageButton.setVisible(true);


    }

}

Answer 1

You're creating two JFrames, displaying one of them but adding your JButton to none of them. In other words, your code ignores this rec:

Add the imgButton to this (ImageButton, which is a JFrame)

Solution: use only one JFrame, your class as per your instructions, add your JButton to it or to a JPanel that is added to the JFrame, and display it.

Specifically, change this:

JFrame frame = new JFrame(); // extra JFrame that's never used!
frame.setTitle("Lab Button");

to this:

super("Lab Button");

and add an add(imgButton); at the end of the constructor.