Use Java's extends keyword to derive a child class from a parent class, invoke parent class constructors and methods, override methods, and more.

I wrote about the NetBeans hint "Overridable Method Call in Constructor" in the blog post Seven Indispensable NetBeans Java Hints . In this post, I look at why having an overridable method called ...

In Constructors -- Level One, the DDATA class implicitly extended OBJECT.CLASS. In fact, any class without an explicit EXTENDS clause in the CLASS statement extends OBJECT.CLASS. To explicitly extend ...

A Java constructor has the same name as the class. A constructor in Java does not have a return type. A constructor can't be static, volatile or final. Why are Java constructors needed? The goal of a ...

Constructors play a key role in all object-oriented programming languages, and Java is no exception. Every class a Java developer creates needs a constructor. Constructors perform numerous important ...