xml - Java XPath Expression error -

i trying print specific node xml data file such pantone 100 example. print out attributes pantone 100 such colors , data hold unsure of how format xpath compile correctly in way pull specific pantone number i'm looking for.

edit: code below outputs null

xml data

<inventory>     <product pantone="100" blue="7.4" red="35" green="24"> </product>     <product pantone="101" blue="5.4" red="3" rubine="35" purple="24"> </product>     <product pantone="102" orange="5.4" purple="35" white="24"> </product>     <product pantone="103" orange="5.4" purple="35" white="24"> </product>     <product pantone="104" orange="5.4" purple="35" white="24"> </product>     <product pantone="105" orange="5.4" purple="35" white="24"> </product>     <product pantone="106" black="5.4" rubine="35" white="24" purple="35" orange="5.4"> </product> </inventory> 

code

import org.w3c.dom.*; import javax.xml.xpath.*; import javax.xml.parsers.*; import java.io.ioexception; import org.xml.sax.saxexception;  public class xpathdemo {      public static void main(string[] args)             throws parserconfigurationexception, saxexception,             ioexception, xpathexpressionexception {          documentbuilderfactory domfactory                 = documentbuilderfactory.newinstance();         domfactory.setnamespaceaware(true);         documentbuilder builder = domfactory.newdocumentbuilder();         document doc = builder.parse("data.xml");         xpath xpath = xpathfactory.newinstance().newxpath();         // xpath query showing nodes value         xpathexpression expr = xpath.compile("/inventory/product[@pantone='100']");          object result = expr.evaluate(doc, xpathconstants.nodeset);         nodelist nodes = (nodelist) result;         (int = 0; < nodes.getlength(); i++) {             system.out.println(nodes.item(i).getnodevalue());         }     } } 

output null

output null because getnodevalue not applicable here. gettextcontent give text between start , end tags, e.g. foobar in example:

<product pantone="100" blue="7.4" red="35" green="24">foobar</product>`. 

however if want print attribute values resultset:

    nodelist nodes = (nodelist)result;     (int = 0; < nodes.getlength(); i++)     {         namednodemap = nodes.item(i).getattributes();         (int j=0; j<a.getlength(); j++)             system.out.println(a.item(j));     } 

or use a.item(j).getnodename() or a.item(j).getnodevalue() retrieve attribute name or value respectively.