Mastering Java: The Ultimate Quiz for 'Thinking in Java'

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Mastering Java: The Ultimate Quiz for 'Thinking in Java'. Dive deep into Java with multiple-choice questions. Challenge yourself with quiz questions designed to test and improve your understanding of the 'Thinking in Java' book. Get ready for your exam!

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Within the SWT version of ColorBoxes, what causes the display to update after a color change?

redraw() method call
Changing the RGB values directly
Calling the system's native paint method
A call to Display.update()

The correct answer is: redraw() method call

In the SWT version of ColorBoxes, calling the redraw() method is what causes the display to update after a color change. Option B, changing the RGB values directly, does not automatically cause the display to update and would require a redraw() call. Option C, calling the system's native paint method, is not a part of SWT and therefore would not be used to update the display. Option D, a call to Display.update(), is used to continuously update the display and is not specific to color changes.