Streams Java8: Merging two lists

 public static void mergeTwoLists(){

    //oneway
    List<String> listOne = new ArrayList<>(Arrays.asList("a", "b", "c"));

    List<String> listTwo = new ArrayList<>(Arrays.asList("c", "d", "e"));

    List<String> combinedList = Stream.of(listOne, listTwo)
            .flatMap(x -> x.stream())
            .collect(Collectors.toList());



    System.out.println(combinedList);

    //second way
    List<String> mergeLists =
            Stream.concat(listOne.stream(),listTwo.stream()).collect(Collectors.toList());


    System.out.println(mergeLists);

}