Java supports class reuse through inheritance and composition. This two-part tutorial teaches you how to use inheritance in your Java programs.

Why does Java's standard class library contain empty interfaces like Cloneable and Serializable? Find out why in this sixth installment in the "Object-oriented language basics" series. You'll also ...

Sealed classes in Java let developers limit the creation and use of subclasses and preserve the class hierarchy. Here is how sealed classes in Java work.

Java’s ternary conditional operator return The Java ternary operator must return a value. The statement evaluated in the body of the Java ternary operator cannot return void. For example, the ...