The more familiar you are with Object and its methods, the more you can do with your Java programs.

Inheritance-using-Override The Plane and Animal programs demonstrate inheritance and method overriding in Java. They show how subclasses extend base classes and provide their own specific behaviors ...

What is inheritance in Java? Inheritance is a programming construct that software developers use to establish is-a relationships between categories.

Sealed classes in Java let developers limit the creation and use of subclasses and preserve the class hierarchy. Here is how sealed classes in Java work.