I'm working in eclipse and I would like to set up a project builder for project `A` (a plugin-in project) so that whenever a resource in project `A` is modified, a Java application is launched. The Java application in question exists in my workspace as project `B` (a Java project) and I have a Java launch configuration for it.

When I go to *Properties > Builders* in project `A` and I try to either create a new builder or import an existing one, the only options are:

* Ant task
* External tool

I could package project `B` and all its dependencies in a runnable JAR and launch it via an ant task, but this seems like overkill when I actually have the `B`'s launch configuration available right there, in the workspace. Is there any way to use `B`'s launch configuration in the project builder? If not, what is the best alternative? My google skills are failing me in finding this out.

Thanks