The abstract keyword can be used in different ways for writing java classes to implement abstraction. We can have: 1.An abstract class with one or more abstract method (s) ...

Most introductory Java texts take an implementation-centric stab at how to use interfaces and abstract classes. However, few provide a clear design distinction for choosing between these two ...

The author discusses his results of measuring the performance degradation of Java programs while using various data abstraction features of the language.

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