Cannot understand small method

Question

I have being looking at this method and while I undertand what the overall job of the method is I cannot understand what some of the lines do.
Here it is:
private static void helloifyClassName(JavaClass java_class )
        class_name = java_class.getClassName() + "_hello";          //Adds _hello to the class name
        int index = java_class.getClassNameIndex();
        index = ((ConstantClass)cp.getConstant(index)).getNameIndex();
        cp.setConstant(index, new ConstantUtf8(class_name.replace('.', '/')));
    }I have not been able to find a description of getClassNameIndex() in documentation, what is a class name index?
He then changes the value of index on the next line so is there any point in having the getClassNameIndex() line?

Answer 1

I have not been able to find a description of
getClassNameIndex() in documentation, what is a class
name index?You'll need to check with the author of the JavaClass class, or consult the documentation.
He then changes the value of index on the next line
so is there any point in having the
getClassNameIndex() line?Perhaps he's saving up that valuable variable allocation space... :o)