1. import java.util.*;2.3. public class LetterASort{4. public static void main(String[] args) {5. ArrayList < String > strings = new ArrayList < String > ();6. strings.add("aAaA");7. strings.add("AaA");8. strings.add("aAa");9. strings.add("AAaa");10. Collections.sort(strings);11. for (String s : strings) { System.out.print(s + " "); }12. }13. }