Want to get id's value using xpath.

Question

Hi all,
I want to get id attribute's value using xpath.
my xml file as follows:
<book>
     <person id="1">
            <first id="2">Kiran</first>
            <last id="3">Pai
                    <name id="4">das</name>
            </last>
            <age id="5">22</age>
     </person>
     <person id="6">
            <first id="7">Bill</first>
            <last id="8">Gates</last>
            <age id="9">46</age>
     </person>
     <person id="10">
            <first id="11">Steve</first>
            <last id="12">Jobs</last>
            <age id="13">40</age>
     </person>
</book>I want to get the id value of name. using xpath-->//book[0]/person[0]/last[0]/name[0]/[@id]..is this a valid xpath to get the id's value? my java code as follows:
import java.io.File;
import java.util.HashMap;
import java.util.Map;
import java.util.Stack;
import javax.xml.parsers.*;
import javax.xml.xpath.*;
import org.w3c.dom.Document;
import org.xml.sax.*;
import org.xml.sax.helpers.DefaultHandler;
public class Evaluate {
     public static void main(String[] args) {
          String xp = "//book[0]/person[0]/last[0]/name[0]"+"/[@id]";
          String id="";
      try{
           // parse the XML as a W3C Document
          DocumentBuilderFactory docBuilderFactory = DocumentBuilderFactory.newInstance();
        DocumentBuilder docBuilder = docBuilderFactory.newDocumentBuilder();// Create the parser
        Document doc = docBuilder.parse(new File("book.xml"));
         XPath xpath = XPathFactory.newInstance().newXPath();
         doc.getDocumentElement().normalize();
         XPathExpression xPathExpression = xpath.compile(xp);//-->getting error here
         id=xPathExpression.evaluate(xp).toString();
         id=xPathExpression.evaluate("person");
         System.out.println("id=" +id);
              System.out.println("xp=" +xp);
              }catch(Exception err){
                System.out.println("Errpr= "+ err);
can anyone please help me ?

Answer 1

No, I believe that XPath indexes begin with 1, not with zero.