Choose the wrong Java collection class, and application performance will suffer. Choose the correct collection classes, and your high Java CPU usage problems will disappear. Recalculation of already ...

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 ...

Abstract classes and interfaces in Java serve fundamentally different purposes. Learn the differences between these Java language elements and how to use them in your programs.