Mastering Java: The Ultimate 2026 All-In-One Quiz to Excel in 'Thinking in Java

Question: 1 / 510

What concurrency mechanism is used in the SWT version of ColorBoxes to handle 'stars' color change?

synchronized blocks

java.util.Timer

getDisplay().asyncExec(new Runnable())

The SWT version of ColorBoxes uses the getDisplay().asyncExec(new Runnable()) concurrency mechanism for handling the color change of 'stars'. This is because SWT is based on the Event Dispatch Thread (EDT) model, where all UI updates must be performed on the main thread. This allows the color changes to be synchronized with the UI updates, ensuring that they happen at the correct time. Options A, B, and D are all incorrect as they are not specific to the SWT version of ColorBoxes and may not guarantee that the color changes are synchronized with the UI updates.

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java.util.concurrent.ExecutorService

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