parse using DOM

does anyone know why this code fails :

all I want to do is output the packet .....

<%@ page import="java.io.*"%>
<%@ page import="org.w3c.dom.*"%>
<%@ page import="org.apache.xerces.parsers.DOMParser"%>
<%@ page import="org.xml.sax.InputSource"%>

<%
String filename = "foo.xml";
DOMParser parser = new DOMParser(filename);
Document fdoc = parser.parse();
%>

the error is :

D:\Java\JavaWebServer2.0\tmpdir\default\pagecompile\jsp\_xml\_Dom__IBM.java:
91: Wrong number of arguments in constructor.
DOMParser parser = new DOMParser(filename);





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