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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What is the purpose of the JTextArea's append() method?

Sets new text in the JTextArea
Adds text at the specified index
Appends text to the existing content
Clears the current text and adds new content

The correct answer is: Appends text to the existing content

The append() method in JTextArea is specifically used to add text to the existing content in the JTextArea. This means that the current content will not be cleared and the new text will be added at the end, making it useful for continuous updates or adding on to previous text. Option A is incorrect because setText() is the method used to completely change the text in JTextArea. Option B is incorrect because insert() is the method used to add text at a specific index, not append(). Option D is incorrect because replaceAll() is the method used to clear the current text and add new content.