XML reader/write success

The XML reader/writer is complete!  This means that we will be able to load and save the users information.  Here is some of the code:

public class XMLRead {
   
     static double PSVolt, PSAmp = 0;                                    // Variables for the power supply
     static double MVolt, MAmp, MSpeed, MTorque, MDriveShaft = 0;        // Variables for the motor
     static double WiLen, WiOhm, WiArea, WiRes = 0;                        // Variables for the wire
     static double WhDiam, WhMu = 0;                                    // Variables for the wheel
     static double RWeight =  0;                                        // General variables for the robot
     static String WiCircuit = " ";                                        // Type of circuit
   
        public static void write(String name) {
       
             try{
                      DocumentBuilderFactory documentBuilderFactory =       DocumentBuilderFactory.newInstance();   
             DocumentBuilder documentBuilder = documentBuilderFactory.newDocumentBuilder();
       
             // Makes the root element robot
             Document doc = documentBuilder.newDocument();
             Element rootElement = doc.createElement("robot");
             doc.appendChild(rootElement);
           
             // The next blocks of code are all children to the root element "robot".
             Element PSvoltage = doc.createElement("PSvoltage");
             PSvoltage.appendChild(doc.createTextNode(Double.toString(PSVolt)));
             rootElement.appendChild(PSvoltage);


 // Creates an instance of TransformerFactory so that a "real" XML file can be created
             TransformerFactory transformerFactory = TransformerFactory.newInstance();
             Transformer transformer = transformerFactory.newTransformer();
             DOMSource source = new DOMSource(doc);
             StreamResult result = new StreamResult(new File(name));
           
             // Exports the XML
             // To clarify:  this is when the XML file is made on the local hard drive. 
             transformer.transform(source, result);
        
    public static void read(String doc) throws IOException, SAXException, ParserConfigurationException{
       
         File file = new File(doc);                                                             
         DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance();   
         DocumentBuilder documentBuilder = documentBuilderFactory.newDocumentBuilder();
         Document document = documentBuilder.parse(file);                                       
       
         // Gets the info and makes it an double
         PSVolt = Double.parseDouble(document.getElementsByTagName("PSvoltage").item(0).getTextContent());   
            
    public static void main (String args []) throws IOException, SAXException,   ParserConfigurationException, DOMException, TransformerException {
   
         try{
             read("robot.xml");               
         }catch (FileNotFoundException e){
             System.err.println("file not found");
         }
       
         try{
             write("file.xml");
         }catch (NullPointerException e){
             e.printStackTrace();
         }
       
         System.out.println("done");


The complete code can be found in the drop box folder.  In fact, the code is already in a folder that can be downloaded and imported into eclipse to work on.