Javasf

A utility to print the SourceFile attribute of one or more Java class files.

Installs a javasf executable to print the SourceFile attribute of one or more Java class files.

For example:

> javasf ThisClass.class ThatClass.class
ThisClass.java
ThatClass.java

Java VM Specification 4.7.7 The SourceFile Attribute

http://java.sun.com/docs/books/jvms/second_edition/html/ClassFile.doc.html#79868