slider scroll using Selenium Java

package com.example.actions;

import java.util.concurrent.TimeUnit;

import org.openqa.selenium.By;
import org.openqa.selenium.Keys;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.firefox.FirefoxDriver;
import org.openqa.selenium.firefox.FirefoxProfile;
import org.openqa.selenium.interactions.Action;
import org.openqa.selenium.interactions.Actions;


public class ScrollBarActions {

WebDriver driver;

public void setup(){
FirefoxProfile profile=new FirefoxProfile();
profile.setEnableNativeEvents(true);
driver=new FirefoxDriver(profile);

driver.manage().window().maximize();

driver.get("http://jqueryui.com/slider/");
driver.manage().window().maximize();
driver.manage().timeouts().implicitlyWait(20, TimeUnit.SECONDS);

}

public void menuandSubMenu(){
System.out.println(driver.findElements(By.tagName("iframe")).size());
// Switch to Frames
// WebElement iframe=driver.findElement(By.xpath("//iframe[@id='demo-frame']"));
driver.switchTo().frame(0);

  //Slider xpath
WebElement rootElement=driver.findElement(By.xpath(".//div[@id='slider']/span"));

int x=rootElement.getLocation().x;
System.out.println(x);
int y=rootElement.getLocation().y;
System.out.println(y);

  WebElement slider = driver.findElement(By.xpath("//div[@id='slider']/span"));
        Actions move = new Actions(driver);
        Action action = (Action) move.dragAndDropBy(slider, 250, 0).build();
        action.perform();
System.out.println("completed");

//or
WebElement slider1 = driver.findElement(By.xpath("//div[@id='slider']/a"));

    for (int i = 1; i <=20 ; i++) {
            slider1.sendKeys(Keys.ARROW_RIGHT);
        }

 
}


public static void main(String[] args) {

ScrollBarActions dd=new ScrollBarActions();
dd.setup();
dd.menuandSubMenu();
}

}