simple-xml is conflicting with redbook/src/glredbook10/simple.java

Hi,

I'm wondering if simple.xml imports as follows

import simple.xml.Element;
import simple.xml.ElementList;
import simple.xml.Root;
import simple.xml.Serializer;
import simple.xml.load.Persister;

are conflicting with redbook/src/glredbook10/simple.java ?

Sorry for my entry-level question, but this has been annoying me for some days.
Can anybody please help?
Thanks in advance.

Best Regards
Pei