The first half of this introduction to Java inheritance teaches you how to use the extends keyword to derive a child class from a parent class, invoke parent class constructors and methods ...

Here's how it works. Use sealed classes in Java to control your inheritance Need to limit the number of possible subclasses in your codebase? Here comes Java's sealed classes to your rescue. Advanced ...

Unlike some languages, such as C++, Java does not allow multiple inheritance with classes. You can use multiple inheritance with interfaces, however. The difference between a class and an ...

Java's open inheritance model can feel like an open invitation to unintended extensions. The problem becomes especially poignant when a switch statement or a nesting of if statements assumes that a ...