Most Android developers will use Java to write their apps. Java is an object oriented programming language. But what precisely does that mean?

For example, a Java program obtains file I/O (input/output) services by creating objects from various file-related classes in Java’s class library and calling their methods.

What does object-oriented programming actually mean? Find out inside PCMag's comprehensive tech and computer-related encyclopedia.

An introduction to the principles of object-oriented programming. This course covers both object-oriented programming techniques and their application to program design including classes, objects and ...

Interested in Java functional programming? The first place you need to start, especially if you use the Streams API, is with this Java Function interface example.

Here's how to make classes, fields, methods, constructors, and objects work together in your Java programs.