Waht is "testing application in vb.net/java" in black box testing?

When a job requirement says that "experience in testing of java applications or testing of applications in vb is needed"; what are they exactly looking for? Where does the difference in testing lies exactly? Does that matter in [B]black box [/B]testing?:confused:

It doesn’t make a whole lot of difference in black box testing.

May be they want to designate the task of integration testing or some part of white-box testing to the test team.

Ya ofcourse,
It's matter.

You know the weakness of language in which application is developed as per your experience, so it's important.