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 ...

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 ...

We can easily see the method signature ... based on the fact that multiple inheritance (extending more than one class) can cause code deadlocks. Java’s engineers decided to avoid that.

The SOLID open-closed principle in Java asserts that a well-designed software component ... the Shape interface as an argument to the OpenClosedExample's compareArea method. This makes the class ...