The Observable design pattern is used in many important Java APIs. One well-known example is a JButton that uses the ActionListener API to execute an action. In this example, we have an ...

Numerous design patterns let you extend functionality; for example, in Java Design Patterns you’ve seen how to extend functionality with the Proxy, Decorator, and Strategy patterns.

For example, aspiring players who want to learn how a Grandmaster played a particular game read a book that describes each move in the game, and they repeat each move on a chessboard in the sequence ...

It's not hard to create a RESTful web service in Java. In fact, frameworks like Spring Boot, the Eclipse MicroProfile and Jakarta Enterprise Edition make the development of RESTful Java applications ...