How to verify existence/absence of debug information in a jar file

Given a jar, how can I tell if it contains debug information or not? Is there a tool for this? (e.g, like the 'file' utility on linux, which outputs whether an ELF executable is stripped or not)
Amit

I'm not saying it's pretty... but there's a horrible quick & dirty way of checking for debug info
Typically the debugging information is stored is special attributes in the class files, like "LineNumberTable", "LocalVariableTable" etc.
Depending on which type of debugging setting was used to compile the source code, these will be present in the binary class file.
So, you might unjar the contents of the jar and run eg.
find "LineNumberTable" *.class
to find all classes with line number information.
I tried it on a sample class and it worked for me here.
Hey, I know it's a hack, but not everyone has time to write a full disassembler !
regards,
Owen

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