存在两个浏览器窗口时，如何从旧窗口切换到新窗口，

     //Store the current window handle    
    String winHandleBefore = driver.getWindowHandle();    
            
//Switch to new window opened    
    for(String winHandle : driver.getWindowHandles()){    
            System.out.println("+++" + winHandle);    
            driver.switchTo().window(winHandle);    
            }    
// Close the original window    
        driver.switchTo().window(winHandleBefore);    
        driver.close();    
            
//Switch to new window opened    
          for(String winHandle : driver.getWindowHandles()){    
            System.out.println("+++" + winHandle);    
            driver.switchTo().window(winHandle);    
            }