Mastering Java: The Ultimate 2025 All-In-One Quiz to Excel in 'Thinking in Java

Question: 1 / 510

Why might a class use a private constructor?

To prevent subclassing

To implement static factory methods

To allow instantiation only inside the class

All of the above

Option A is incorrect because a private constructor does not necessarily prevent subclassing, it only restricts direct access to the constructor. A subclass could still access the superclass' private constructor through a public or protected method.

Option B is incorrect because static factory methods can be implemented using public constructors.

Option C is incorrect because a private constructor does not necessarily mean the class can only be instantiated from inside the class. Other static methods in the class could also create an instance using the private constructor.

A private constructor may be used for a combination of these reasons, but not exclusively for any one reason.

Get further explanation with Examzify DeepDiveBeta
Next Question

Report this question

Download Mastering Java: The Ultimate Quiz for 'Thinking in Java PDF Study Guide
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy