This is an example of Java inheritance with method overriding. First, we extend the Animal class to create a new Cat class. Next, we override the Animal class’s emitSound() ...

The Greenfoot Wombats scenario—part of the Greenfoot tutorial. The inheritance diagrams on the right of the window show the World class, which is the current scenario’s playing field, and ...

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 ...