Java is a programming language.

What is a programming language?

The full description is in the link, but in short we can conclude that a programming language is just a way to communicate with the computer.

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When you have a schoolproject you probably create a folder on your computer and maybe a sub-folder, in which you will save the documents of your schoolproject. This exactly how codefiles are structured in Java.

Java	Computer
Java Project	Desktop
Source Folder	Folder
Package	Sub-Folder
Class	The File

Why you need this structure will be discussed later on!

We will call this: the structure OUT-side of the File or the structure OUT-side of the Class.

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