HOW TO HANDLE MULTIPLE WINDOW HANDLES.

 

package demopackage;
import java.util.Iterator;
import java.util.Set;
import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeDriver;

public class WindowsExample {

 public static void main(String[] args) {
  // TODO Auto-generated method stub

  System.setProperty("webdriver.chrome.driver", "C:\\Work\\chromedriver.exe");
  WebDriver driver = new ChromeDriver();
  driver.manage().window().maximize();
  driver.get("https://www.google.com/intl/en-GB/gmail/about/#");
  System.out.println(driver.getTitle());
  driver.findElement(By.xpath("//ul[@class='h-c-header__cta-list header__nav--ltr']//a[contains(@class,'h-c-header__nav-li-link')][contains(text(),'Sign in')]")).click();
  Set  ids = driver.getWindowHandles();
  Iterator it = ids.iterator();
  String parentid = it.next();
  String childid = it.next();

  driver.switchTo().window(childid);
  System.out.println(driver.getTitle());
  driver.switchTo().window(parentid);
  System.out.println(driver.getTitle());
  driver.quit();
 }

}