Selenium:How to handle Auto Suggestions using selenium web driver

package New;

import java.util.List;
import java.util.concurrent.TimeUnit;

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;
import org.testng.annotations.BeforeClass;
import org.testng.annotations.AfterClass;

public class Autosuggestions {
    WebDriver driver;

    @Test
    public void autosuggests() {
        driver.get("http://www.bing.com/");
        driver.manage().timeouts().implicitlyWait(30, TimeUnit.SECONDS);
        driver.findElement(By.id("sb_form_q")).sendKeys("webdriver");
        driver.manage().timeouts().implicitlyWait(30, TimeUnit.SECONDS);

        /*
         * List<WebElement>
         * sug=driver.findElements(By.xpath("//ul[@id='sa_ul']/li"));
         * driver.manage().timeouts().implicitlyWait(30,TimeUnit.SECONDS);
         * System.out.println(sug.size()); for (int i = 0; i < sug.size(); i++)
         * { System.out.println(sug.get(i).getText());
         *
         * }
         */

        driver.findElement(By.xpath("//ul[@id='sa_ul']/li[3]")).click();
        ;
    }

    @BeforeClass
    public void beforeClass() {
        driver = new FirefoxDriver();
        driver.manage().window().maximize();
        driver.manage().timeouts().implicitlyWait(30, TimeUnit.SECONDS);
    }

    @AfterClass
    public void afterClass() {
        driver.quit();

    }

}