In this Java 101 tutorial, I’ve explained how interfaces differ from classes, and showed you how to declare, implement, and extend interfaces in your Java programs.

Create packages, import packaged classes and interfaces into your programs, move packages, and encapsulate them in jar files.

Also known as the Java 8 Predicate -- which stems from the JDK version where functional programming was introduced to developers -- this simple interface defines five methods, although only the Java ...

There is a reason why Java method modifiers exist. If you call public methods internally and don't understand why, your developers could face major class issues.