public int isMember(String classname, String membername, int index) {
        MemberrefInfo minfo = (MemberrefInfo)getItem(index);
        if (getClassInfo(minfo.classIndex).equals(classname)) {
            NameAndTypeInfo ntinfo
                = (NameAndTypeInfo)getItem(minfo.nameAndTypeIndex);
            if (getUtf8Info(ntinfo.memberName).equals(membername))
                return ntinfo.typeDescriptor;
        }

        return 0;       // false
    }