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

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Dive into the depths of Java with our quiz based on "Thinking in Java, Fourth Edition" by Bruce Eckel. Test your knowledge, solidify concepts, and prepare for certification with challenging questions and insightful feedback.

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

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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.