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

Welcome to the Java 101 study guide. This guide complements " Class and Object Initialization." It provides a glossary of terms specific to that article, new homework, solutions to last month's ...

Declaring Classes in Java In Java, a class is a blueprint for creating objects. A class defines the properties (attributes) and behaviors (methods) that its objects will have. Declaring a class ...

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

Note: Java's Object class is poorly named because an "object" is usually an instance of a class. But the class that all classes ultimately and implicitly extend from is called Object. In this course, ...

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 ...

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.