Classes, fields, methods, constructors, and objects are the building blocks of object-based Java applications. This Java tutorial teaches you how to declare classes, describe attributes via fields ...

Object-oriented systems are usually partitioned into layers of related responsibilities and only dependencies in one direction are allowed, from higher layers (more specific, less reusable) to lower ...

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 ...

While designing the class structure, you might find that some classes share functionality with other classes. In that case, you can extend classes by creating subclasses to prevent duplication of ...

This is an in-depth java tutorial for beginners. Learn what Java is, how to get started, and how to build basic apps using key concepts!