Abstract classes are an interesting piece of Java. They can’t be used on their own, and they have a unique place in our code. They are often confused with interfaces, but they provide a great way to prevent code duplication and ensure consistent structures when building an application.

 In this tutorial we want to look at what Abstract classes are and when to use them. We will take a look at the previous Interfaces lesson and see how we could refactor our code from that lesson to use an Abstract class.
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