Java | 硒| 使用Stream从Weblement列表中返回单个Webelement

Question

I'm trying to filter a list of webelements down to a single webelement by the elements's innerText. In c#, I would use a linq where clause. In Java, I'm trying to use stream but I can't figure out why I'm getting the incompatible type error (required: org.openQA.selenium.Webelement. Found: java.util.optional)

public List <WebElement> emp = driver.findElements(By.className("employee"));

public String correctName = driver.findElement(By.id("name")).getText();

public WebElement getName(){
    WebElement correct = emp.stream().filter((element) -> element.getText().contains(correctName)).findFirst();
   return correct;
}

Answer 1

The error is fair. findFirst returns an Optional . You have to get the object explicitly like so.

WebElement correct = emp.stream().filter((element) -> element.getText().contains(correctName)).findFirst().orElse(null);

So if the Optional is not empty, it will return the value, otherwise it will return null . Note get on an Optional is not recommended to use and it'll be deprecated in future.