How to create your Java Executable...

What is a package?
A package is a collection of related classes... (physically in your hard-disk is a directory/folder) all files under the package will be compressed together in a jar file...(a java archive like zip)
Your java application may contain one or more packages to logically group functionality.

When you deploy your application you create one jar file per project.
In this jar file you must specify which is the java class file that contains the main class (the starter class) of your project.

Follow the instructions on the screen-cam to create your java "executable".

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