SELENIUM 2(WebDriver) with GRID

Prerequisites:
     1.Install TestNG in Eclipse using the URL:http://beust.com/eclipse
     2.Download WebDriver package from the location link
     3.Download Selenium-server jar file from the location link

I have created 2 sample scripts for demo :

sample.java
import java.net.MalformedURLException;
import java.net.URL;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.remote.DesiredCapabilities;
import org.openqa.selenium.remote.RemoteWebDriver;
import org.testng.annotations.AfterMethod;
import org.testng.annotations.BeforeMethod;
import org.testng.annotations.Test;

public class sample {

WebDriver d;
@BeforeMethod
public void BM() throws MalformedURLException
{
DesiredCapabilities capability=null;
capability= DesiredCapabilities.firefox();
capability.setBrowserName("firefox");
d = new RemoteWebDriver(new URL("http://localhost:4444/wd/hub"), capability);
d.get("http://google.com");
}
@Test
public void test()
{
System.out.print("test");
}
@AfterMethod
public void AM()
{
d.quit();
}
}

sample1.java
import java.net.MalformedURLException;

import java.net.URL;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.remote.DesiredCapabilities;
import org.openqa.selenium.remote.RemoteWebDriver;
import org.testng.annotations.AfterMethod;
import org.testng.annotations.BeforeMethod;
import org.testng.annotations.Test;

public class sample1 {

WebDriver d;
@BeforeMethod
     public void BM() throws MalformedURLException
{
DesiredCapabilities capability=null;
capability= DesiredCapabilities.firefox();
capability.setBrowserName("firefox");
d = new RemoteWebDriver(new URL("http://localhost:4444/wd/hub"), capability);
d.get("http://google.com");
}
@Test
    public void test()
{
System.out.print("test");
}
@AfterMethod
public void AM()
{
d.quit();
}
}

TestNG.XML

<?xml version="1.0" encoding="UTF-8"?>
<suite name="Selenium Grid with webdriver" verbose="3"  parallel="classes" thread-count="2">  
  <test name="Selenium Grid Demo">
  <parameter name="browser" value="firefox"/>
    <classes>
      <class name="packagename.sample"/>
 <class name="packagename.sample1"/>
    </classes>
 </test>

 </suite>

Now to start the Grid and Node: open CMD and navigate to selenium-server-standalone-x.x.x.jar file is located and use the following commands

Create hub using below command
java -jar selenium-server-standalone-2.33.0.jar -role hub

Create node using below command
java -jar selenium-server-standalone-2.33.0.jar -role webdriver -hub http://localhost:4444/grid/register

Create another node using below command
java -jar selenium-server-standalone-2.33.0.jar -role webdriver -hub http://localhost:4444/grid/register -port 5556


Note:You can create N number of nodes,but give different port number for each node