In response to my recent blog posting Immutable Java Objects, Matt brought up a good point of discussion related to making Java classes truly immutable by declaring them as final so that they ...

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.

Immutability means that something cannot be changed. In Java, an immutable class is one whose state cannot be changed once it has been created. This shot aims to give a guideline of how to make a ...