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 ...

Classes and objects in Java must be initialized before they are used. You’ve previously learned that class fields are initialized to default values when classes are loaded, and that objects are ...

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

The meaning of inversion of control in Java. We can define the word inversion as a reversal of the natural order. When programming in Java, the natural order is to declare variables and then ...

But primitive types aren’t objects, and that presents a problem. For example, all the collection classes in the JDK hold data as objects. If a developer has a set of int values they want to store in ...