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 ...

Learn how to write and validate unit tests with JUnit 5. This article shows you how to configure a Maven project for JUnit, write basic and parameterized unit tests, and use JUnit 5’s built-in ...

How to Encrypt and Decrypt. This program uses the Caesar Cipher algorithm, which we discussed last month.As a review, this cipher works by shifting each letter by 0 to 25 times.

According to the Java Enhancement Proposal 445: …these changes allow us to write Hello, World! with no access modifiers, no static modifiers, and no String[] parameter, so the introduction of these ...

Any object representing a mutable data source in Java exposes methods for reading and writing its data as a stream. Java.io is the main package for most stream-oriented I/O classes.