Drag, Drop and Slide

import org.openqa.selenium.By;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.firefox.FirefoxDriver;
import org.openqa.selenium.interactions.Actions;
import org.testng.annotations.AfterClass;
import org.testng.annotations.BeforeClass;
import org.testng.annotations.Test;

public class Diff_Elements
{
    private static FirefoxDriver driver;

    @BeforeClass
    public void BeforeClass()
    {
        driver = new FirefoxDriver();
    }

    @AfterClass
    public void AfterClass()
    {
        driver.close();
        driver.quit();
    }

    @Test
    public void drag() throws Exception
    {
        driver.get("http://jqueryui.com/demos/draggable/");
        Thread.sleep(10000);
        driver.switchTo().frame(driver.findElement(By.xpath("/html/body/div/div[2]/div/div/iframe")));
        Thread.sleep(2000);
        WebElement draggable = driver.findElement(By.xpath("//*[@id='draggable']"));
        new Actions(driver).dragAndDropBy(draggable, 200, 120).build().perform();
        Thread.sleep(5000);
    }

    @Test
    public void drop() throws Exception
    {
        driver.get("http://jqueryui.com/demos/droppable/");
        Thread.sleep(10000);
        driver.switchTo().frame(driver.findElement(By.xpath("/html/body/div/div[2]/div/div/iframe")));
        Thread.sleep(2000);
        WebElement d1 = driver.findElement(By.id("draggable"));
        WebElement d2 = driver.findElement(By.id("droppable"));
        new Actions(driver).dragAndDrop(d1, d2).build().perform();
        Thread.sleep(5000);
    }

    @Test
    public void slide() throws Exception
    {
        driver.get("http://jqueryui.com/demos/slider/");
        Thread.sleep(10000);
        driver.switchTo().frame(driver.findElement(By.xpath("/html/body/div/div[2]/div/div/iframe")));
        Thread.sleep(2000);
        WebElement draggable = driver.findElement(By.className("ui-slider-handle"));
        new Actions(driver).dragAndDropBy(draggable, 120, 0).build().perform();
        Thread.sleep(5000);
    }
}


Below is the testng file for drag, drop and slide

<suite name="s1">
    <test name="t1">
        <classes>
            <class name="Diff_Elements" />
            <methods>
                <include name="drag" />
                 <include name="drop" />
                  <include name="slide" />
            </methods>
        </classes>
    </test>
</suite>