Why Does My JButton Behavior Change Unexpectedly When Resizing the JFrame?

Something seems wrong with the layout, JButton showing unexpected behaviour at resize of the window

Expected Behaviour

The program works as expected when run initially. When the "STOP" JButton is clicked, the animation stops, and the text on the same JButton changes to "START." Similarly, when the "BALL COLOUR" JButton is clicked, the colour of the ball changes, as does the colour of the "BALL COLOUR" JButton to match the ball's colour. This behaviour continues as long as the application is not resized.

Unexpected Behaviour

However, unexpected behaviour occurs when the JFrame is resized by dragging its right side. In this scenario, if the "STOP" JButton is pressed and then the "BALL COLOUR" button is clicked, the text on the "STOP" JButton (which should not change) changes to "START," and the colour of the "BALL COLOUR" JButton remains unchanged or turns blue (when it should change to the colour of the ball). This behaviour persists until the window is resized back to its original size or close to it.

Possible Cause

This issue is likely related to the layout management of the application, specifically the resizing behaviour of the components. When the window is resized, the components may not be properly updated to accommodate the new size, resulting in unexpected behaviour.

Proposed Solution

To resolve this issue, consider the following approaches:

1. Review the layout management: Ensure that the layout manager used in the application is appropriate for the desired behaviour. Consider using a layout manager that dynamically adjusts the components based on the available space, such as GridBagLayout or SpringLayout.
2. Implement a custom layout manager: If the built-in layout managers do not meet your specific requirements, you can create a custom layout manager that defines the desired behaviour for resizing the components.
3. Use SwingWorker: Consider using SwingWorker to perform the task of changing the colour of the "BALL COLOUR" JButton in a separate thread. This can help isolate the issue and prevent interference with the main event-dispatching thread, which may be affected by the resizing of the window.

By investigating the layout management and exploring the use of SwingWorker, you can resolve the issue and ensure the expected behaviour of the application, regardless of resizing.

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