Why Does My JButton Behavior Change Unexpectedly When Resizing My Java Swing Window?

JButton resizing issue and unexpected behavior in ball animation application

Problem:

The user is describing an issue within their Java Swing application where the behavior of a JButton changes unexpectedly when the window is resized. Specifically, the START/STOP button changes its text back to START after being clicked and the BALL COLOUR button does not update its color and text as expected.

Solution:

The provided solution addresses several potential issues that could contribute to the observed behavior:

1. Excessive use of revalidate() and repaint():

The original code unnecessarily calls revalidate() and repaint() after setting the background color of buttons. These methods are only required if the layout or appearance of the component needs to be adjusted dynamically.

2. Color limitations and API usage:

Color.white cannot be brighter and Color.black cannot be darker. Additionally, the example uses Color.darkGray.darker() which results in Color.black. For colors that have both light and dark variations, use Color.brighter() or Color.darker() appropriately.

3. Use of a Queue for color management:

Instead of using a static array of colors, a Queue is employed to simplify color management and allow for cycling through the colors.

4. Corrected DrawingArea repaint calls:

The DrawingArea component properly calls repaint() when its background or foreground color is updated.

5. Optimized Button behavior:

The START/STOP button changes its text correctly based on the timer's running state. The BALL COLOUR button updates its background color to match the currently selected color.

Code Comparison:

Here is a comparison of the original and revised code:

Original:

startStopButton.setBorder(BorderFactory.createLineBorder(
                        Color.WHITE, 4, true));
buttonPanel.add(startStopButton);

colourButton.setBorder(BorderFactory.createLineBorder(
                        Color.WHITE, 2, true));
buttonPanel.add(colourButton);

Revised:

startStopButton.setBorder(BorderFactory.createLineBorder(Color.gray, 4));
buttonPanel.add(startStopButton);

colourButton.setBorder(BorderFactory.createLineBorder(Color.gray, 4));
buttonPanel.add(colourButton);

By addressing these issues, the provided solution aims to stabilize the behavior of the application and eliminate the unexpected behavior when resizing the window.

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