Use Java's extends keyword to derive a child class from a parent class, invoke parent class constructors and methods, ... Calling superclass methods from subclass methods.

A subclass is defined with the extends keyword. For example, the syntax ClassB extends ClassA establishes ClassB as a subclass of of ClassA. Java only supports single inheritance, meaning a subclass ...

In Java, the term inheritance refers to the adoption of all non-private properties and methods of one class (superclass) by another class (subclass). Inheritance is a way to make a copy of an existing ...

Sealed classes make Java an even more powerful and expressive language and set the stage for even more sophisticated techniques such as pattern matching, which we'll explore in a subsequent article. A ...