There are numerous new classes, enums, methods, and interfaces being added to JDK 7 that may not get significant coverage in the blogs and articles on Java 7. In this post, I list and describe some of ...

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, ...

An abstract class is a template definition of methods and variables in a specific class, or category of objects. In programming, objects are units of code, and each object is made into a generic class ...

Instance main methods and unnamed classes, coming in Java 21, will forever change how developers learn Java and bootstrap applications. Why? They provide a simple, clean and concise syntax to launch ...

Extension methods provide a great way for extending a class functionality -- but it's interfaces that let you use those methods anywhere you want. Extension methods let you add functionality to an ...

So I'm at a client's site and we're discussing adding a new method to an existing class. One of the client's programmers said, "We should put the method in the base class and let all the derived ...