Learn how to use object-oriented programming in Java to design and organize your code based on real-world concepts and entities, and make it more reusable, flexible, and simple.

The OOP languages (such as Java, C++ and C#) let you think in the problem space, and use software objects to represent and abstract entities of the problem space to solve the problem. For example, ...

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