How to create a runnable jar with the eclipse jdt API?

Question

When we are in Eclipse IDE and right-click on a java project, we have the option to export that project as a runnable Jar file .

It exists, thus, some code that uses the jdt API to accomplish this task.

I know the package used should be org.eclipse.jdt.ui.jarpackager but I couldn't find how.

Does anybody know something more?

To be clear, I'd like to start in my program (eclipse plug-in) with a JProject object and be able to save a jar file (and later load the same) in the workspace.

EDIT: It's a programming problem. I don't know how to use the classes of org.eclipse.jdt.ui.jarpackager to transform a JProject in a runnable Jar file .

Answer 1

Solved by myself.

I simply extended the fatJarExportWizard and used it.