How to get either of two strings in Java that is not null and concatenate

Question

I have two strings in a list. Now either of them or both of of the strings could be null. And I'll be concatenating the string in this list which is not null, with another string say ABC. It's guaranteed the list would have only two elements and either one or both of the strings will be null. If both are null output will be nullABC

My solution looks like this:

public class Main {

    public static void main(String[] var0) {
        List<String> l = Arrays.asList(null,"sfdafd");
        String str = (l.get(0)!=null ? l.get(0) : l.get(1)) + "ABC" ;
        System.out.println(str); // sfdafdABC
    }
}

Answer 1

Stream the list, filter non-null elements and find the first.

If you don't find anything, you can say "use null instead":

l.stream().filter(Objects::nonNull).findFirst().orElse(null)

Then just add the "ABC" to the end.