Xerces question

Question

hi all,
i wanted to know how to get the attribute 'width' from the following tag:
<svg width="382" height="966" viewBox="0 0 382 966" xml:space="preserve">
also, i have an error(Exception in thread "main" java.lang.NoSuchMethodError: main ) when i tried to run my app even though i dont have any errors when compiling.
please help. thank you
the following is just a testing code(it does simple stuff):
import org.w3c.dom.*;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.*;
import org.xml.sax.*;
import java.io.*;
import java.io.File;
public class getImageAttribute
     public getImageAttribute()
          String txt;
          Document doc;
          Element imageElement;
          try
               DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
               DocumentBuilder builder = factory.newDocumentBuilder();
               doc = builder.parse("d:\\project\\svg\\temp.svg");
               Element root = doc.getDocumentElement();
               imageElement = (Element)root.getElementsByTagName("image").item(0);
               txt = imageElement.getAttribute("xlink:href");
               System.out.println(txt);
          catch (ParserConfigurationException ioe)
               ioe.printStackTrace();
          catch (SAXException sax)
               sax.printStackTrace();
          catch (IOException io)
               io.printStackTrace();
}

Answer 1

You get a runtime error, because you're trying to execute a main routine in a class that doesn't have any (any Java beginner's book would help).
For accessing the data in your attributes try the following:
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.w3c.dom.NamedNodeMap;
import org.xml.sax.SAXException;
public class JAXPDOMTest{
   public void domParse(String url)
      DocumentBuilder parser;
      DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
      factory.setValidating(true);
      try {
         parser = factory.newDocumentBuilder();
         Document doc = parser.parse(url);
         Node svg = doc.getElementsByTagName("svg").item(0);
         if(svg!=null)
            NamedNodeMap nnmap = svg.getAttributes();
            if(nnmap!=null)
               int n=nnmap.getLength();
               for(int i=0;i<n;++i)
                  Node node=nnmap.item(i);
                  System.out.println("attibute("+node.getNodeName()+")="+node.getNodeValue());
            else
               System.out.println("NamedNodeMap =null");
         else
            System.out.println("Node svg=null");
      } catch (Exception e) {
         e.printStackTrace();
   static public void main(String[] args)
      JAXPDOMTest x=new JAXPDOMTest2();
      x.domParse("test.xml");
}Here's the simple test.xml I tried:
<?xml version="1.0"?>
<svg width="382" height="966" viewBox="0 0 382 966" xml:space="preserve"/>Take a look at this thread:
http://forums.java.sun.com/thread.jsp?forum=34&thread=151897
Hope that helps.