public static void testAlert(WebDriver driver) {  String url="http://sislands.com/coin70/week1/dialogbox.htm";  driver.get(url);    WebElement alertButton = driver.findElement(By.xpath("http://input[@value='alert']"));  alertButton.click();    Alert javascriptAlert = driver.switchTo().alert();  System.out.println(javascriptAlert.getText());  javascriptAlert.accept(); }  public static void testPrompt(WebDriver driver) throws Exception {  String url="http://sislands.com/coin70/week1/dialogbox.htm";  driver.get(url);    WebElement promptButton = driver.findElement(By.xpath("http://input[@value='prompt']"));  promptButton.click();  Thread.sleep(2000);  Alert javascriptPrompt = driver.switchTo().alert();  javascriptPrompt.sendKeys("This is learning Selenium");  javascriptPrompt.accept();     System.out.println(javascriptPrompt.getText());    javascriptPrompt=driver.switchTo().alert();  javascriptPrompt.accept();    Thread.sleep(2000);  promptButton.click();  javascriptPrompt=driver.switchTo().alert();  javascriptPrompt.dismiss();  Thread.sleep(2000);  javascriptPrompt=driver.switchTo().alert();  javascriptPrompt.accept(); }  public static void testConfirm(WebDriver driver) throws Exception {  String url="http://sislands.com/coin70/week1/dialogbox.htm";  driver.get(url);    WebElement confirmButton = driver.findElement(By.xpath("http://input[@value='confirm']"));  confirmButton.click();  Thread.sleep(2000);  Alert javascriptConfirm = driver.switchTo().alert();  javascriptConfirm.accept();  Thread.sleep(2000);  javascriptConfirm = driver.switchTo().alert();  javascriptConfirm.accept(); }