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 ...

What is the single responsibility principle? The single responsibility principle in Java demands that a class serves a single, clear purpose. Any attempt to add peripheral functionality to a ...

Here's a quick look at the three types of class loaders and everything you need to know to work with them in your Java programs. Java class loaders are a component of the Java virtual machine (JVM) ...

A Java string is a sequence of characters that exists as an object of the class java.lang. Java strings are created and manipulated through the string class. Once created, a string is immutable -- its ...

In this post, we will learn how to call a method in Java. This is a useful “chunk” of code that you can call from anywhere else in your program, thus preventing you from needing to write out the same ...

Java programs without a graphical user interface use a computer's command line to interact with the user. It is vital that the program's command line output is properly formatted and spaced so that it ...