Locating WebElements using XPath

/*********************************

Title  : Locate Element By Xpath
Author : Gaurav Khanna

 *********************************/

package com.gaurav.webdriver;

import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.firefox.FirefoxDriver;
import org.testng.annotations.Test;

public class LocateByXpath {

    //
    WebDriver webDriver = new FirefoxDriver();

    @Test
    public void testlocateByXpath() throws InterruptedException {

        //
        webDriver.get("http://book.theautomatedtester.co.uk/chapter1");

        //
        WebElement button = webDriver.findElement(By
                .xpath("/html/body/div[2]/p[2]/input"));

        //
        button.click();

        //
        Thread.sleep(5000);

        //
        webDriver.quit();

    }
}