[Php-java-bridge-users] Can't get simplest call using bridge to work - help

[<php...@li...>]

I am going crazy with this.  Any help would be greatly appreciated.

I just can't seem to understand how to communicate to java classes  
via PHP.  I know very little about Java, so am just trying to get the  
basics working before I go further with my project.  I'm sure this is  
ridiculously easy for you Java folks, but I am very confused - I must  
be going about this the wrong way:

I compiled a java class into a file called "HelloWorld.jar":

import java.util.*;
public class HelloWorld {
     public static void main (String args[]) {
         // insert code here...
         System.out.println("What up dog!");
     }
}

Then I created a PHP script to try and make a call to this using the  
PHP/Java bridge:

<?php
require_once('php_Java.php');
$dir = dirname($_SERVER['SCRIPT_FILENAME']);
java_require($dir."/HelloWorld.jar");

$x = new JavaClass("HelloWorld");
$y = new java_class("HelloWorld");
$z = new java("HelloWorld");
echo "=== CAST AS STRING ===<br/>";
echo (string)$x."<br/>";
echo (string)$y."<br/>";
echo (string)$z."<br/>";
echo "=== JAVA VALUES ===<br/>";
echo (java_values($x))."<br/>";
echo java_values($y)."<br/>";
echo (java_values($z))."<br/>";
echo "<p>-- END --";
?>

And when I fire this up in Safari to look at the results, I get:

=== CAST AS STRING ==
class HelloWorld
class HelloWorld
HelloWorld@aed5f9
=== JAVA VALUES ===
class HelloWorld
class HelloWorld
HelloWorld@aed5f9
-- END --

Why doesn't this thing print out my text.  What the heck am I doing  
wrong?  Any help appreciated.

Jon