Please visit the following link:

http://www.roseindia.net/xml/dom/DOMValidateDTD.shtml

Many Thanks for your help, I've changed little in code and found minimized code for any dtd mentioned in xml. please advice for my below commented lines.

public boolean ParseXML(String filename)

        {
String DTD_PATH = c:/dtd/;

          valid = true;  
          try{
              DocumentBuilderFactory factory = 
              DocumentBuilderFactory.newInstance();
              factory.setValidating(true);
              DocumentBuilder builder = factory.newDocumentBuilder();
                  builder.setErrorHandler(new org.xml.sax.ErrorHandler() 
                  {
                  //Ignore the fatal errors
                      public void fatalError(SAXParseException exception)
                       throws SAXException { }
                      //Validation errors 
                      public void error(SAXParseException e)
                          throws SAXParseException {
                          System.out.println("Error at " +e.getLineNumber() + " line.");
                          m.log.info(this,"PARSING ERROR at line : "+e.getColumnNumber()+" : "+e.getMessage());
                          System.out.println(e.getMessage());
                          valid = false;
                          }
                      //Show warnings
                      public void warning(SAXParseException err)
                      throws SAXParseException{
                        m.log.info(this,"PARSING ERROR at line : "+err.getColumnNumber()+" : "+err.getMessage());
                      System.out.println(err.getMessage());
                      valid = false;
                      //System.exit(0);
                      }
                  });                 
              Document xmlDocument = builder.parse(new FileInputStream(filename),DTD_PATH);

//Please tell me the use of below commented lines since now this code can run on any mentioned dtd in xml.            
/*DOMSource source = new DOMSource(xmlDocument);                          
              StreamResult result = new StreamResult(System.out);
              TransformerFactory tf = TransformerFactory.newInstance();
              Transformer transformer = tf.newTransformer();
              transformer.setOutputProperty(OutputKeys.DOCTYPE_SYSTEM, "c:/dtd/EMC-UPDATE.dtd");
              transformer.transform(source, result);              */

              }
              catch (Exception e) {
              System.out.println("ERROR :: "+e.getMessage());
              m.log.info(this,"ERROR : "+m.ctool.getException(e));
              return false;
              }
              return valid;
          }

Many Thanks for your help, I've changed little in code and found minimized code for any dtd mentioned in xml. please advice for my below commented lines.

public boolean ParseXML(String filename)

        {
String DTD_PATH = c:/dtd/;

          valid = true;  
          try{
              DocumentBuilderFactory factory = 
              DocumentBuilderFactory.newInstance();
              factory.setValidating(true);
              DocumentBuilder builder = factory.newDocumentBuilder();
                  builder.setErrorHandler(new org.xml.sax.ErrorHandler() 
                  {
                  //Ignore the fatal errors
                      public void fatalError(SAXParseException exception)
                       throws SAXException { }
                      //Validation errors 
                      public void error(SAXParseException e)
                          throws SAXParseException {
                          System.out.println("Error at " +e.getLineNumber() + " line.");
                          m.log.info(this,"PARSING ERROR at line : "+e.getColumnNumber()+" : "+e.getMessage());
                          System.out.println(e.getMessage());
                          valid = false;
                          }
                      //Show warnings
                      public void warning(SAXParseException err)
                      throws SAXParseException{
                        m.log.info(this,"PARSING ERROR at line : "+err.getColumnNumber()+" : "+err.getMessage());
                      System.out.println(err.getMessage());
                      valid = false;
                      //System.exit(0);
                      }
                  });                 
              Document xmlDocument = builder.parse(new FileInputStream(filename),DTD_PATH);

//Please tell me the use of below commented lines since now this code can run on any mentioned dtd in xml.            
/*DOMSource source = new DOMSource(xmlDocument);                          
              StreamResult result = new StreamResult(System.out);
              TransformerFactory tf = TransformerFactory.newInstance();
              Transformer transformer = tf.newTransformer();
              transformer.setOutputProperty(OutputKeys.DOCTYPE_SYSTEM, "c:/dtd/EMC-UPDATE.dtd");
              transformer.transform(source, result);              */

              }
              catch (Exception e) {
              System.out.println("ERROR :: "+e.getMessage());
              m.log.info(this,"ERROR : "+m.ctool.getException(e));
              return false;
              }
              return valid;
          }