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.

Writing a Java application (see Android) that consumes a JSON API usually involves mapping the JSON objects to Java classes for use in the software. This is a tedious and repetitive task to say ...

One of Groovy 's most significant " goodies " is the ability to intercept calls, even to standard Java classes, and either override existing methods or even add new methods dynamically. In this ...