如何迭代多个列表 <WebElement> 在硒/ Java中

Question

I have the following WebElement List in a page

@FindBy(xpath="a")

private List<WebElement> generalList ;

@FindBy(xpath="b")

private List<WebElement> eventList ;

@FindBy(xpath="c")

private List<WebElement> additionalList ;

I want to iterate each of the above list items and apply clear through a loop instead of writing the following way which currently works

for(WebElement type:generalList)
type.clear();
for(WebElement type:eventList)
type.clear();
for(WebElement type:additionalList)
type.clear();

Answer 1

In Java 8 you can try using Stream as below :-

generalList.stream().forEach(elem -> elem.clear());

eventList.stream().forEach(elem -> elem.clear());

additionalList.stream().forEach(elem -> elem.clear());

Or concatenate all of these list and try as :

Stream.of(generalList, eventList, additionalList).flatMap(Collection::stream).forEach(elem -> elem.clear());

Answer 2

With Guava:

for (WebElement type : Iterables.concat(generalList, eventList, additionalList)) {
    type.clear();
}

With Java 8:

Stream.of(generalList, eventList, additionalList)
        .flatMap(List::stream)
        .forEach(WebElement::clear);

Answer 3

you can create a helper function

void clearAll(List<WebElement>... f) {
        Arrays.stream(f).forEach((li)->{li.forEach(WebElement::clear);});
}

and call it like clearAll(generalList, eventList, additionalList);