certification Archives - Page 2 of 3

Modularity – Java advanced (OCP)

Possibility to organize a projects in modules appeared in Java 9. In this post, we’ll have a look at differences…

Functional Programming (FP) is a programming paradigm, as OOP is. Java can make use of both. FP relies on Functions.…

A nested class is a class written inside another, in order to prevent outside classes to access it or use…

This article is probably to be read together with the one on methods in Java OOP. There is a lot…

Certification and technical interviews will check if you know your OOP principles and can apply them. In the associate level…

In this article I’ll explain how I passed the 1Z0-819 Oracle Certified Professional Java SE 11: the level and experience…

Since Java 8, the java.util.Date class is deprecated and new package java.time was introduced. Even though the old Date class…

Wrapper classes are reference types that allow to manipulate primitives as so. They are thus nullable, and are necessary to…