Slow to convert Oracle 11g XMLType into Java String or Document

After retrieving a result set from an Oracle 11g database, it takes roughly 75 seconds to convert the XMLType (this is a structured XML Storage, registered with an xsd) into either a java String or Document. I'm using Java 1.6, have the xdb.jar and xmlparserv2.jar
This xsd is <100 lines and the xml document is also <100 lines.
Sample code:
oracle.xdb.XMLType xml = oracle.xdb.XMLType.createXML((oracle.sql.OPAQUE)rset.getObject("XMLDATA"));
the other way, but still took just as long:
XMLType xml = (XMLType)rset.getObject("XMLDATA");
xml.getStringVal();
or
org.w3c.dom.Document doc = xml.getDocument();
either way of the above ways takes just as long.

If I put this value into the database table, I can
see only the date. Time part is missing. Is this the
problem with java.sql.Date or Oracle datatype Date?This is not a problem, this is the defined behaviour of the Date type. RTFAPI and have a look at Timestamp, while you're at it.

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Please refer to the execution procedure below:
* I used AL32UTF8 database.
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import oracle.sql.*;
import oracle.jdbc.*;
import oracle.xdb.XMLType;
import java.util.*;
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http://download.oracle.com/docs/cd/B28359_01/appdev.111/b28369/xdb11jav.htm#i1033914
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http://download.oracle.com/docs/cd/B28359_01/appdev.111/b28369/xdb_xquery.htm#CBAEEJDE

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Slow to convert Oracle 11g XMLType into Java String or Document

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