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.

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 ...

This ability to implicitly treat instance methods as functions accepting their instance as a parameter is a powerful feature of Java’s lambda expressions and method references. It allows you to ...

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 ...

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 ...

In object-oriented programming, particularly in Java, class fields are seperated into two distinct types: class variables and instance variables. Class variables are variables that have been defined ...

This post explains how to call a method in Java. Learn how to define methods, ... to the class and not the instance of ... we wish to pass from one method to another. Variables are values ...

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 ...