Single inheritance and multiple inheritance How to use the extends keyword in Java Understanding Java class hierarchy When to use method overriding vs. method overloading Inheritance can descend ...

When two classes are related through inheritance, the child class must be able to access every accessible field, method, or constructor of its parent class. In Java, we use the reserved word super ...

A method might accept a specific type and its subclasses, but you want to restrict usage to a select few implementations of your own design. Java's open inheritance model can feel like an open ...