Nested classes – Java advanced (OCP)
A nested class is a class written inside another, in order to prevent outside classes to access it or use…
Passing the 1Z0-819 Oracle Certified Professional Java SE 11: preparation and exam experience
In this article I’ll explain how I passed the 1Z0-819 Oracle Certified Professional Java SE 11: the level and experience…
Wrapper classes | Preparing for Java Oracle Associate Certification (OCA) / Java basic technical tests
Wrapper classes are reference types that allow to manipulate primitives as so. They are thus nullable, and are necessary to…