Users are advised to get on board with object-oriented programming sooner rather than later, because OOP is the future.

Greenfoot's real value is in its flexibility, allowing for conceptual discussions of programming concepts or in-depth programming projects appropriate for high school students.

Here's what you need to know about object-oriented programming with classes, methods, objects, and interfaces, with examples in Java, Python, and TypeScript.

The remainder of this article will explore various object-oriented JPA concepts with a sample application that implements functionality for a simple development scenario.