Use Java's extends keyword to derive a child class from a parent class, invoke parent class constructors and methods, override methods, and more.

Ever wonder why Java's const keyword is unimplemented? More specifically, why do we mark global constants in Java with both the static and final keywords? Why are Java constants static and final? The ...

If you need to control access to certain pieces of data in a class when writing multithreaded applications, see how you can use the volatile keyword to get a similar effect as using the ...