How to find out which JSRs are used in a jar file?

I want to know if a jar file can run properly on my phone, I know JSRs that my phone supports，but I don't know which JSRs are used in a jar，so can anyone suggest me开发者_如何转开发 any tool?

May be this discussion will helps you. And also look at this discussion, Programmatically checking JSR with j2me