How to get a list of method signatures that are used in a classfile?

[laeubi]

Assume I have a classfile and I like to find out what methods are called (e.g. System.out.println) programmatically. It seems JDT can do this somehow as if I search for references of a method ist also seem to find some matches in JAR files without the source.

So basically something like javap offers but in a more structured way, I'm not interested in the bytecode or actual parameters passed only the plain method signatures like java.util.ArrayList.add(E)