Variable scope is the range of code where a variable is visible and can be referenced. In JavaSE, there are four types of variable scope: class, instance, method, and block. Class variables are ...

Fork and clone this lesson to run the code. Let's add an instance variable isWaggingTail to the Dog class. Each dog will store its own copy of the variable. Let's step through the main method using ...

Get a deep dive into using method references in your Java programs, including stream operations, event listeners, and constructors and factories.

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

Here's a topic I don't understand. What's the benefit of making a private constructor and a public getInstance method? I understand why you would make the constructor private: to keep someone from ...

Static-Variables-Sample Sample project for implementing instance and static fields and methods In object-oriented programming, particularly in Java, class fields are seperated into two distinct types: ...

This post explains how to call a method in Java. Learn how to define methods, call them from other classes, and pass arguments!

Ensure a variable is unchanged within a method. When Java’s static and final keywords are combined, a class-level variable can be made constant, which essentially turns it into a global variable. This ...