How to export the referenced jar package and the project to a jar file

The reason to export the runnable JAR. is because we want to export the referenced jar package with this project, so do not select the Jar file

Choose File/export ... Then java/runnable the jar file and select the class with main () to run, choose extract required libraries into generated JAR.

Why export-->runnable Jar file's launch configuration has nothing to choose from?

Why MyEclipse8.5 's export-->runnable jar File--> 's launch configuration has nothing to choose from, In fact, the main method of project that you want to package as a jar file is executed once, for example, the main method is in Class A, and a is executed once.

How to export the referenced jar package and the project to a jar file