The first half of this tutorial introduced the basics of inheritance in Java. You learned how to use Java’s extends and super keywords to derive a child class from a parent class, invoke parent ...

See the Java inheritance tutorial for a complete introduction to using the extends keyword and Object superclass in Java programs. See “Java tip: Inheritance relationships in JPA and Hibernate ...

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 ...