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

This post explains how to use classes in Java to build objects and organize your code. Also learn: constructors, static methods, and more!

In Classes and objects in Java, you learned how to declare static fields and static methods as members of a class, and in Class and object initialization in Java, you learned how to declare static ...

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 ...

Everything a programmer writes in Java is written inside a class, which is a fundamental building block of an object-oriented language.

For new Java programmers, the JOptionPane class is a great visual and user-friendly introduction to user input and Swing-based programming. Here's how to get started.