Objects and Classes in Java Using Accounting as an Example. In Java, the concepts of classes and objects are central to object-oriented programming (OOP). A class in Java can be thought of as a ...

In Java, methods can be categorized into class methods (static methods) and object methods (instance methods). The key difference between them lies in how they are called and what they operate on. 1.

For an introduction to Java interfaces, including the difference between classes and interfaces, see my Java 101 tutorial Working with interfaces in Java. Nesting interfaces in classes Java lets ...