Move to nearby grid point

Question

I'm using java and window builder I have a 4x4 grid on my jframe made out of jlabels. I can press a button and it displays an image (red.png) at a random grid point.

How can I make it so that

Answer 1

The image will likely be displayed as an ImageIcon.

• Use a 2 dimensionaly array of JLabel held by your JPanel in its GridLayout.
• When a button is pushed, find the JLabel with the red Icon, a for loop will work well for this. You can simply get the icon from the JLabel in the loop and see if it equals the of interest, here I'll call the redDiskIcon.
• Remove the Icon by calling setIcon(null)
• Then use a for loop to find a new location and set the icon via setIcon(redDiskIcon).

Note that most of this is unnecessary:

JLabel b = new JLabel("");      
panel.add(a);

JLabel b = new JLabel("");      
panel.add(b);

JLabel c = new JLabel("");      
panel.add(c);

final JLabel d = new JLabel("");        
panel.add(d);

JLabel e = new JLabel("");      
panel.add(e);

Just use a for loop to create your JLabels and add them to the grid JPanel and to your JLabel array. No need for variables a, b, c, d,... and in fact many reasons not to have these variables.