java - 合并两个 WebElements 列表

Question

无法打印合并列表中的值，因为它会抛出 null!

List<WebElement> DateTime2 = driver.findElements(By.xpath(""));
driver.findElement(By.xpath("")).click();
List<WebElement> DateTime3 = driver.findElements(By.xpath(""));
List<WebElement> DateTime = new ArrayList<>(DateTime2);
DateTime.addAll(DateTime3);
Thread.sleep(2000);
System.out.println("This is for testing the list " + 
DateTime.get(2).getText());
System.out.println("This is for testing the list " + 
DateTime.get(30).getText());

我希望输出打印日期和时间

Answer 1

这是我使用的一些代码的示例(尽管我对此示例进行了一些更改。这通常是扩展另一个类的一部分。)

int sanitycount= 0;
int ec_Timeout = 10; //seconds to wait for list... 
    public void RunAction(WebDriver driver, String in_xpath)
    {
                  try
      {
        wait = new WebDriverWait(driver, ec_Timeout);
        List<WebElement> found_elements = new ArrayList<>();
        found_elements = wait.until(ExpectedConditions.presenceOfAllElementsLocatedBy(By.xpath(in_xpath)));

        if (!found_elements.isEmpty())
        {
        // store this array, return an array from function
        // or loop through array and add items to more global array..
        }

       }
       catch (Exception e)
       {
       if (e.getClass().getCanonicalName().equals("org.openqa.selenium.StaleElementReferenceException"))
         {
         //need to do it again, not finished loading
         System.out.println("*****************Stale caught-redoing");
         sanitycount++;
         if (sanitycount<ec_Timeout * 2)
         {
         RunAction(driver, in_xpath);
         }
      System.out.println (e.toString());
      }
      else
      {
      System.out.println (e.toString());
      }
    }
  }
RunAction(your_driver, your_xpath); 
//set sanitycount back to zero if you run again...