Switch between two windows in selenium webdriver - windows

Question

I am getting error of NoSuchWindowException with this code.I am unable to switch back to old opened window and get back to new window
please review my code and help me.
public void TC_123617()throws InterruptedException {
driver.findElement(By.id("user_login")).sendKeys("akhil");
driver.findElement(By.id("user_pass")).sendKeys("akhil");
driver.findElement(By.id("wp-submit")).click();
Thread.sleep(3000);
driver.findElement(By.cssSelector("#awebsome_oruw-2 > ul")).click();
WebElement userStatus = driver.findElement(By.xpath(".//*[#id='awebsome_oruw-2']/ul/li[11]"));
String parentWindow = driver.getWindowHandle();
driver = new FirefoxDriver();
driver .manage().window().maximize();
driver.get("http://103.16.143.96/incis/wp-login.php");
driver.findElement(By.id("user_login")).sendKeys("manager");
driver.findElement(By.id("user_pass")).sendKeys("manager");
driver.findElement(By.id("wp-submit")).click();
for (String popUpHandle : driver.getWindowHandles()) {
if(!popUpHandle.equals(parentWindow)){
driver.switchTo().window(popUpHandle);
driver.switchTo().window(parentWindow);
}
}
}

Answer 1

You don't need to create a new driver instance if you want to switch between windows using driver.
Save a reference to current window. (so that you can return to perform actions on the window you started from.)
String parentWindow = driver.getWindowHandle();
Next Step, get all the windows and switch to the new window.
List<String> allWindows = driver.getWindowHandles();
for(String curWindow : allWindows){
driver.switchTo().window(curWindow);
}
Now, you can perform any action on the new window, and when done you could close it using
driver.close();
Finally, you can switch back to the parent window to continue your actions using
driver.switchTo().window(parentWindow)