Web Reference: Mar 9, 2026 · Abstraction in Java is the process of hiding internal implementation details and showing only essential functionality to the user. It focuses on what an object does rather than how it does it. Data abstraction is the process of hiding certain details and showing only essential information to the user. Abstraction can be achieved with either abstract classes or interfaces (which you will learn more about in the next chapter). This section provides you an example of the Java Abstract Class. To create an abstract class in Java, just use the abstract keyword before the class keyword, in the class declaration.
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