Classes, fields, methods, constructors, and objects are the building blocks of object-based Java applications. This Java tutorial teaches you how to declare classes, describe attributes via fields ...

What's the benefit of making a private constructor and a public getInstance method? I understand why you would make the constructor private: to keep someone from instantiating a class.

How to use the Java Scanner for user input The Java Scanner class is a simple, versatile, easy-to-use class that makes user input in Java relatively straightforward. To perform user input with the ...

Joshua Bloch uses an example similar to mine above to illustrate Item 5 (“Avoid Creating Unnecessary Objects”) in the Second Edition of Effective Java. He points out that this extra ...