Opening a class in nested JARs doesn't decompile the file

[Noricc]

I'm looking at the JAR of the Dacapo benchmarks. I want to check the bytecode of one of the classes of one of the benchmarks, called fop.

When I open a .class file in a JAR file, it works. However, My JAR file contains a directory in which other JAR files are stored (in a jar/ directory). Opening the nested jar files works (I can see the classes and look at them in fundamental mode), but with the plugin, I get the message : Error: class not found: org.apache.fop.fonts.substitute.FontSubstitutions.

Can I look at the generated javap command, to see what the problem is?

[Noricc]

I found out why it wasn't working, the command that is ran when reading a class inside a jar is javap -classpath <jar-file> <class-name>, which makes sense. In my case, this doesn't work because <jar-file> is not accessible (it's itself inside a jar).

I guess a workaround would be to extract the jar content into a directory. And then take a look.

[gbalats]

I haven't written Java for a while. Can you extract the contents of a class in the inner jar directly with javap, using the outer jar? Is this even possible with the proper manifest settings (e.g., classpath including inner jar)?