Help with running sun jndi tutorial example LookUp.class

Question

I am learning JNDI,and when I run LookUp.java available in JNDI TUTORIAL ,souce code here:
* @(#)Lookup.java     1.3 99/08/12
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import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import java.util.Hashtable;
class Lookup {
public static void main(String[] args) {
     // Check that user has supplied name of file to lookup
     if (args.length != 1) {
     System.err.println("usage: java Lookup <filename>");
     System.exit(-1);
     String name = args[0];
     // Identify service provider to use
     Hashtable env = new Hashtable(11);
     env.put(Context.INITIAL_CONTEXT_FACTORY,
     "com.sun.jndi.fscontext.RefFSContextFactory");
     try {
     // Create the initial context
     Context ctx = new InitialContext(env);
     // Look up an object
     Object obj = ctx.lookup(name);
     // Print it out
     System.out.println(name + " is bound to: " + obj);
     // Close the context when we're done
     ctx.close();
     } catch (NamingException e) {
     System.err.println("Problem looking up " + name + ": " + e);
after I compiled it sucessfully,I typed
java LookUp d:/test.java ,error message shown following:
Problem looking up LookUp.java: javax.naming.NoInitialContextException: Cannot i
nstantiate class: com.sun.jndi.fscontext.RefFSContextFactory [Root exception is
java.lang.ClassNotFoundException: com.sun.jndi.fscontext.RefFSContextFactory]
please help me!

Answer 1

Read the Preparations chapter of the tutorial.
It tells you to download and install the file
system service provider from
http://java.sun.com/products/jndi/#download