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 ...

Implementing Interfaces: When a class implements an interface, you can think of the class as signing a contract, agreeing to perform the specific behaviors of the interface. If a class does not ...

Because Java allows a class to implement multiple interfaces but extend only one class, the interface might be considered advantageous when a particular implementation needs to be associated with ...

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) ...

How does the open-closed SOLID principle work in a Java program? Here we show you what this important principle means, and how to implement the open-closed principle in Java.

A great deal of Java programming -- from conditional statements to iterative loops -- deals with the evaluation of true or false values. When you work with the JDK's Streams API and Lambda functions, ...