Problem with Xerces-1_2_1(Java)

[Rajarshi Ghosh]

Hi , I have downloaded the xerces-1_2_1 from apache site.I am reading the Java-Xml Book from Oreilly. After extracting the xerces files I have set the classpath to <roo>/xerces.jar and <root>xercesSamples.jar. Then I have created one folder called 'practice' inside 'Samples' i.e (<root>/Xerces/Samples/practice).Now I am facing two problems.  1. I wrote SAXPerserDemo.java and saved it inside 'practice' as below:    import org.xml.sax.XMLReader;   public class SAXPerserDemo{  public void performDemo(String uri){   System.out.println("Parsing XML FIle :"+uri+"\n\n");   try{    XMLReader parser = (XMLReader)Class.forName("org.apache.xerces.parsers.SAXParser").newInstance();   }catch(Exception e){    e.printStackTrace();   }  }    public static void main(String args[]){   if(args.length == 0){    System.out.println("Usage:java SAXPerserDemo [XML URI]");    System.exit(0);   }   String uri = args[0];   SAXPerserDemo perserDemo = new SAXPerserDemo();   perserDemo.performDemo(uri);  }   }  In oreilly it is given :  XMLReader parser = new SAXParser();  But this line does not compile in this version of Xerces.So I made the changes as XMLReader parser = (XMLReader)Class.forName("org.apache.xerces.parsers.SAXParser").newInstance(); then it compiles successfully. Now what should I do to get the line XMLReader parser = new SAXParser(); compiled successfully.    2. When I copiled the file SAX2Count.java from 'sax' to 'practice'     directory and made some changes and rename it as SAX2CountModified.java then it compiled     successfully but when I gave the command java SAX2CountModified then it gave me the exception     as:  G:\Xerces\Samples\practice>java SAX2CountModified Exception in thread "main" java.lang.NoClassDefFoundError: SAX2CountModified (wr ong name: sax/SAX2CountModified)         at java.lang.ClassLoader.defineClass0(Native Method)         at java.lang.ClassLoader.defineClass(ClassLoader.java:403)         at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:10 1)         at java.net.URLClassLoader.defineClass(URLClassLoader.java:248)         at java.net.URLClassLoader.access$1(URLClassLoader.java:216)         at java.net.URLClassLoader$1.run(URLClassLoader.java:197)         at java.security.AccessController.doPrivileged(Native Method)         at java.net.URLClassLoader.findClass(URLClassLoader.java:191)         at java.lang.ClassLoader.loadClass(ClassLoader.java:280)         at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:275)         at java.lang.ClassLoader.loadClass(ClassLoader.java:237)   *** Please inform me what should I do to get it run.  Waiting for your mail.    With Regards   Rajarshi Ghosh ([EMAIL PROTECTED])