使图像显示在JButton上

Question

I'm trying to make a chessboard (8x8 grid) and fill it with background squares, but it always appears as a grid of empty squares. The image is called emptysquare.jpg but it does have a background color.

How to I correctly add an image to a JButton on the grid I have?

Answer 1

The reason that your chessboard is empty is due to the fact that you call JFrame#setVisible before adding your ChessSquare buttons to your panel. Ensure all component have been added before making this call.

Also set the Icon like this in ChessSquare

ImageIcon empty = ...
setIcon(empty);

Answer 2

You need to call setIcon( empty ) in your constructor.

It's allowed-but-awkward to call setVisible( ) before the squares are added, but if you do you may need to repack to get the layout right.

The call to setLayout( ) must be moved before the loop.