1. Java Class Path Setting
Class path wildcards allow you to include an entire directory of .jar
files
in the class path without explicitly naming them individually.
https://docs.oracle.com/javase/8/docs/technotes/tools/windows/classpath.html
2. Jar building:
The building process of a jar executable will automatically include all the class/package dependencies into the jar file, together with the class file compiled from the source.
3. Intellij IDE:
When there is no module level in the project, build module and build project are essentially the same thing