Selenium Webdriver - Accessing 2nd Child window(Popup) - selenium

Question

I am automating an application in IE where if user clicks a link on the main window , a child window popups. User further clicks another link from the child window where a 2nd child window popsup. Please find the screenshot of the same application screenshot
Problem is that the 3rd popup window is behind the 2nd popup window. with the following code i am able to get the title for the 3rd popup window, but cannot able to work (Like click on any link etc) over there.
Please find below the code which i have used to navigate to 3rd window from the 2nd.
`String Mw1 = driver.getWindowHandle();
//User clicks a radio button on 2nd window
driver.findElement(By.id("CallType-0")).click();
//User click a submit button and after this the 3rd window popsup
driver.findElement(By.id("cmdLogCall")).click();
Set<String> r1=driver.getWindowHandles();
Iterator<String> i2 =r1.iterator();
while (i2.hasNext())
{
String childwindow2 = i2.next();
if(!Mw1.equalsIgnoreCase(childwindow2))
{
driver.switchTo().window(childwindow2);
String z = driver.getTitle();
System.out.println(z);
driver.findElement(By.id("overridelink")).click();
}
}`
Kindly let me know how can i access the 3rd window.Thanks

Answer 1

Use the following code to switch onto the required window
ArrayList<String> allWindows = new ArrayList<String> (driver.getWindowHandles());
driver.switchTo().window(allWindows.get(2));
System.out.println(driver.getTitle());
driver.switchTo().defaultContent();