如何使用Selenium WebDriver和Java关闭特定的窗口？

import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.chrome.ChromeDriver;
import java.util.concurrent.TimeUnit;
import java.util.List;
import java.util.Set;
public class CloseSpecificWindow {
   public static void main(String[] args) {
      System.setProperty("webdriver.chrome.driver", "C:\Users\ghs6kor\Desktop\Java\chromedriver.exe");
      WebDriver driver = new ChromeDriver();
      driver.get("https://secure.indeed.com/account/login");
      //implicit wait
      driver.manage().timeouts().implicitlyWait(5, TimeUnit.SECONDS);
      //window handle of parent window
      String m = driver.getWindowHandle();
      driver.findElement(By.id("login-google-button")).click();
      // store window handles in Set
      Set w = driver.getWindowHandles();
      // iterate window handles
      for (String h: w){
         // switching to each window
         driver.switchTo().window(h);
         String s= driver.getTitle();
         // checking specific window title
         if(s.equalsIgnoreCase("Sign in - Google Accounts")){
            System.out.println("Window title to be closed: "+ driver.getTitle());
            driver.close();
         }
      }
      // switching parent window
      driver.switchTo().window(m);
      driver.quit();
   }
}