title: how to check the version of jar file?
body: <p>I am currently working on a J2ME polish application, just enhancing it. I am finding difficulties to get the exact version of the jar file.
  Is there any way to find the version of the jar file for the imports done in the class? I mean if you have some thing, import x.y.z; can we know the version of the jar x.y package belongs to?</p>