PHP/Java Bridge [duplicate]

Possible Duplicate:
Troubleshooting ClassNotFoundException when using PHP/Java bridge

Can anyone please explain me about the PHP/Java Bridge installation.

I already installed bridge in my system.

This is my HelloWorld.java code :

import javax.swing.JOptionPane;

public class HelloWorld
{
    public static final String JAVABRIDGE_PORT="8081";
    static final php.java.bridge.JavaBridgeRunner runner = 
                 php.java.bridge.JavaBridgeRunner.getInstance(JAVABRIDGE_PORT);

    public static void main(String args[]) throws Exception
    {
        runner.waitFor();
        System.exit(0);
    }
    public void hello(String args[]) throws Exception
    {
        JOptionPane.showMessageDialog(null, "hello " + args[0]);
    }
}

This is my HelloWorld.php code:

<?php 
    require_once("http://localhost:8081/JavaBridge/java/Java.inc");

    $world = new java("HelloWorld");
    echo $world->hello(array("from PHP"));
?>

While calling Java class from php, it is not working and it is showing the below error:

Fatal error: Uncaught [[o:Exception]:"java.lang.Exception: CreateInstance failed: new HelloWorld. Cause: java.lang.ClassNotFoundException: HelloWorld VM: 1.5.0_01@http://java.sun.com/" at: #-31 org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1438) #-30 org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1284) #-29 java.lang.ClassLoader.loadClassInternal(Unknown Source) #-28 java.lang.Class.forName0(Native Method) #-27 java.lang.Class.forName(Unknown Source) #-26 php.java.bridge.Util.classForName(Util.java:1518) #-25 php.java.bridge.JavaBridge.CreateObject(JavaBridge.java:445) #-24 php.java.bridge.Request.handleRequest(Request.java:458) #-23 php.java.bridge.Request.handleOneRequest(Request.java:510) #-22 php.java.servlet.PhpJavaServlet.handleLocalConnection(PhpJavaServlet.java:202) #-21 php.java.servlet.PhpJavaServlet.handlePut(PhpJavaServlet.java:250) #-20 php.java.servlet.PhpJavaServlet.doPut(PhpJavaServlet.java:261) #-19 javax.servlet.http.HttpServlet.service(HttpS in http://localhost:8081/JavaBridge/java/Java.inc on line 195

Can you please anyone help me on this.

Thanks in advance.