need very basic help with xml parsing in java

[2potatocakes]

I've been looking for a couple of hours on the net and can't find an answer. Thought I'd ask you guys.

If I have a very basic .xml file with 2 fields containing only numbers in each.

Just for simplicities sake at the moment all I want to find out is how to read the 2 fields, convert them to Integers and then add them together as if they are 2 seperate integer values.

I can read the xml elements fine.

I'm assuming they're just strings at the moment, so I assumed I could just use Integer.parseInt

But it won't work. It compiles fine, but throws up an error when I try to output the integer values.

Does anyone know what I'm doing wrong?

[Eranga]

Can you post your code here to see?

[2potatocakes]

Without the:

int difx;
difx=Integer.parseInt(text);
System.out.println(difx);

part, it works fine and outputs a number, but I really need to be able to convert the string into an integer. Can you see what I'm doing wrong?

import java.awt.*;
import javax.swing.*;
import java.io.*;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

public class XMLReader {

public static void main(String argv[]) {

try {
File file = new File("c:\\myjava\\firstgo2.xml");
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
DocumentBuilder db = dbf.newDocumentBuilder();
Document doc = db.parse(file);
doc.getDocumentElement().normalize();
System.out.println("Root element " + doc.getDocumentElement().getNodeName());
NodeList nodeLst = doc.getElementsByTagName("employee");
System.out.println("Information of all employees");


for (int s = 0; s < nodeLst.getLength(); s++) {

Node fstNode = nodeLst.item(s);

if (fstNode.getNodeType() == Node.ELEMENT_NODE) {

Element fstElmnt = (Element) fstNode;
NodeList fstNmElmntLst = fstElmnt.getElementsByTagName("firstname");
Element fstNmElmnt = (Element) fstNmElmntLst.item(0);
NodeList fstNm = fstNmElmnt.getChildNodes();
System.out.println("First Name : " +
((Node) fstNm.item(0)).getNodeValue());


String text = ((Node) fstNm.item(0)).getNodeValue().toString();
System.out.println(text);

int difx;
difx=Integer.parseInt(text);
System.out.println(difx);

}

}
} catch (Exception e) {
e.printStackTrace();
}
}
}

[2potatocakes]

Oh and the xml file is just very basic and looks like this:

<?xml version="1.0" encoding="utf-8"?>

<company>
<employee>
<firstname>1254
</firstname>
<surname>8765
</surname>
</employee>
</company>

[Eranga]

You have chosen the node in wrong way.

for (int s = 0; s < nodeLst.getLength(); s++) {
            Node fstNode = nodeLst.item(s);
            if (fstNode.getNodeType() == Node.ELEMENT_NODE) {
                Element fstElmnt = (Element) fstNode;
                NodeList fstNmElmntLst = fstElmnt.getElementsByTagName("firstname");
                Element fstNmElmnt = (Element) fstNmElmntLst.item(0);
                NodeList fstNm = fstNmElmnt.getChildNodes();
                System.out.println("First Name : " +
                ((Node) fstNm.item(0)).getNodeValue());

                String text = ((Node) fstNm.item(0)).getNodeValue().trim();
                System.out.println(text);

                int difx;
                difx = Integer.parseInt(text);
                System.out.println(difx);
            }
        }

[2potatocakes]

Thanks heaps mate, really appreciate it.

.trim() eh??

never thought to use that before. But again thanks. Works perfect now!:D

[Eranga]

Do you know what the reason to use trim() instead toString()?

[2potatocakes]

I didn't before you posted your last message. But I looked it up. Just found out, it trims the whitespaces off the beginning and the end of the string and creates a substring.

Very handy, thanks again.