Combine Lists Of Letters
import java.awt.List; import java.util.ArrayList; import java.util.Scanner; public class CombineListsOfLetters { public static void main(String[] args) { ArrayList<Character> list1 = readListChar(); ArrayList<Character> list2 = readListChar(); list2.removeAll(list1);/* w w w . ja va2s . c om*/ list1.addAll(list2); for (Character character : list1) { System.out.print(character + " "); } } public static ArrayList<Character> readListChar() { Scanner input = new Scanner(System.in); String[] chars = input.nextLine().split(" "); ArrayList<Character> list = new ArrayList<>(); for (String ch : chars) { list.add(ch.charAt(0)); } return list; } }