Is there a way of appending an object to a list and returning the result in one line in a functional non-imperative way? How would you do it if also the original list should not be mutated? Java 8 is allowed.
I already know how to concat two lists in one line. (Source)
List listAB = Stream.concat(listA.stream(), listB.stream()).collect(Collectors.toList());
I also know how to make a list out of objects in one line.
List listO1 = Collections.singletonList(objectA);
List listO2 = Stream.of(objectA, objectB).collect(Collectors.toList());
List listOO = Arrays.asList(objectA, objectB);
Is there anything better than replacing listB
in the first line with a part of the following lines?