FixedMessageSequenceProtocol

public class FixedMessageSequenceProtocol {

    int currentJoke;

    public FixedMessageSequenceProtocol (int step) {
        this.currentJoke = step;
    }

    private static final int WAITING = 0;
    private static final int SENTKNOCKKNOCK = 1;
    private static final int SENTCLUE = 2;
    private static final int ANOTHER = 3;

    private static final int NUMJOKES = 10;

    private int state = WAITING;
    // private int currentJoke = 0;

    private String[] clues = { "Turnip", "Little Old Lady", "Doctor",
                               "Teacher", "Dog",  "Firefighter",
                               "Zoologist",  "Atch", "Who", "Who" };  // 10 Items
    private String[] answers = { "Turnip the heat, it's cold in here!",
                                 "I didn't know you could yodel!",
                                 "Is there an owl doctor?",
                                 "Teacher who says do ur HW please",
                                 "Dog who runs",
                                 "Firefighter who saves people",
                                 "Zoologist who discovers",
                                 "Bless you!",
                                 "Is there an owl in here?",
                                 "Is there an echo in here?" };

    public String processInput(String theInput) {

            String theOutput = null;

            if (state == WAITING) {
                theOutput = "Knock! Knock!";
                state = SENTKNOCKKNOCK;
            } else if (state == SENTKNOCKKNOCK) {
                if (theInput.equalsIgnoreCase("Who's there?")) {
                    theOutput = clues[currentJoke];
                    state = SENTCLUE;
                } else {
                    theOutput = "You're supposed to say \"Who's there?\"! " +
                    "Try again. Knock! Knock!";
                }
            } else if (state == SENTCLUE) {
                if (theInput.equalsIgnoreCase(clues[currentJoke] + " who?")) {
                    theOutput = answers[currentJoke] + " Want another? (y/n)";
                    state = ANOTHER;
                } else {
                    theOutput = "You're supposed to say \"" +
                    clues[currentJoke] +
                    " who?\"" +
                    "! Try again. Knock! Knock!";
                    state = SENTKNOCKKNOCK;
                }
            } else if (state == ANOTHER) {
                if (theInput.equalsIgnoreCase("y")) {
                    theOutput = "Knock! Knock!";
                    if (currentJoke == (NUMJOKES - 1))
                        currentJoke = 0;
                    else
                        currentJoke++;
                    state = SENTKNOCKKNOCK;
                } else {
                    theOutput = "Bye.";
                    state = WAITING;
                }
            }
            return theOutput;
    }