Inheritance and composition in Java In this article, you’ll learn the differences between inheritance and composition and how to decide which is correct for your Java programs: ...

A method might accept a specific type and its subclasses, but you want to restrict usage to a select few implementations of your own design. Java's open inheritance model can feel like an open ...

Spacing of Output in Java. Java programs without a graphical user interface use a computer's command line to interact with the user. It is vital that the program's command line output is properly ...