Why Doesn\'t My JPanel Update After Adding New Images in My Puzzle Game?

JPanel Update Issue in Puzzle Game

In your puzzle game, you encounter an issue where JPanel doesn't update despite adding updated images. Let's delve into the problem and provide solutions.

The issue arises because after modifying the images in the Img[], the addComponents method is called to add the updated images to the JPanel. However, this method only adds the components without invoking a panel repaint.

To ensure that the JPanel updates correctly, you need to explicitly call the repaint and validate methods after modifying the components. The repaint method initiates the rendering process, while validate ensures that the layout is up-to-date and applied to the components.

Updated Code:

public void addComponents(Img[] im){
    this.removeAll();
    for(int i=0; i<16; i++){
        im[i].addActionListener(this);
        im[i].setPreferredSize(new Dimension(53,53));
        add(im[i]);
    }
    this.validate();
    this.repaint();
}

Additional Considerations:

In your code, you use a JButton as the Img class, which is not ideal for drawing images. It's recommended to extend the JPanel class for drawing custom components. Alternatively, you can use JLabel to display images.

Also, when shuffling the images, it's possible that the correct image may appear in place. To avoid this, you can shuffle the images randomly and check if they are in their correct places before adding them to the JPanel.

Alternative Approach:

Instead of using separate images, you can also slice a single image into tiles and add them to the JPanel. This eliminates the need to manage multiple images and simplifies the updating process.

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