CS1 Standard Demo Page

package chromesthesia2;

import javax.swing.*;
import painter.SPainter;
import java.util.Scanner;
import javax.swing.SwingUtilities;

public class Chromesthesia {

    public static void main(String[] args){
        SwingUtilities.invokeLater(new ThreadForGUI());
    }
    private static class ThreadForGUI implements Runnable{
        public void run(){
            new Chromesthesia();
        }
    }
    public Chromesthesia(){
        interpreter();
    }

    private static SPainter miro;
    private static Pitch[] pitches;

    public static void interpreter(){
        intialization();

        String melody = "melody";

        while(true) {
            String input = getInput();
            if (input.equalsIgnoreCase("EXIT")) {
                break;
            } else if (input.equalsIgnoreCase("AGAIN")) {
                try {
                    playMelody(melody, pitches);
                } catch (Exception ex) {
                    showErrorMessage(ex.toString());
                }
            } else {
                melody = input;
                try {
                    playMelody(melody, pitches);
                } catch (Exception ex) {
                    showErrorMessage(ex.toString());
                }
            }
        }
        cleanup();
    }
    private static Pitch[] establishPitches(SPainter painter){
        Pitch[] pitches = new Pitch[21];
        Pitch pitchMiddleC = new Pitch("C", painter);
        pitches[0] = pitchMiddleC;
        Pitch pitchLowC = new Pitch("C," , painter);
        pitches[1] = pitchLowC;
        Pitch pitchHighC = new Pitch("c", painter);
        pitches[2] = pitchHighC;

        Pitch pitchMiddleD = new Pitch("D", painter);
        pitches[3] = pitchMiddleD;
        Pitch pitchLowD = new Pitch("D," ,painter);
        pitches[4] = pitchLowD;
        Pitch pitchHighD = new Pitch("d", painter);
        pitches[5] = pitchHighD;

        Pitch pitchMiddleE = new Pitch("E", painter);
        pitches[6] = pitchMiddleE;
        Pitch pitchLowE = new Pitch("E,", painter);
        pitches[7] = pitchLowE;
        Pitch pitchHighE = new Pitch("e", painter);
        pitches[8] = pitchHighE;

        Pitch pitchMiddleF = new Pitch("F", painter);
        pitches[9] = pitchMiddleF;
        Pitch pitchLowF = new Pitch("F,", painter);
        pitches[10] = pitchLowF;
        Pitch pitchHighF = new Pitch("f", painter);
        pitches[11] = pitchHighF;

        Pitch pitchMiddleG = new Pitch("G", painter);
        pitches[12] = pitchMiddleG;
        Pitch pitchLowG = new Pitch("G,", painter);
        pitches[13] = pitchLowG;
        Pitch pitchHighG = new Pitch("g", painter);
        pitches[14] = pitchHighG;

        Pitch pitchMiddleA = new Pitch("A", painter);
        pitches[15] = pitchMiddleA;
        Pitch pitchLowA = new Pitch("A,", painter);
        pitches[16] = pitchLowA;
        Pitch pitchHighA = new Pitch("a", painter);
        pitches[17] = pitchHighA;

        Pitch pitchMiddleB = new Pitch("B", painter);
        pitches[18] = pitchMiddleB;
        Pitch pitchLowB = new Pitch("B,", painter);
        pitches[19] = pitchLowB;
        Pitch pitchHighB = new Pitch("b", painter);
        pitches[20] = pitchHighB;
        return pitches;
    }

    private static Pitch find(String token, Pitch[] pitches) throws Exception{
        for (int i = 0; i < pitches.length; i = i + 1){
            Pitch pitch = pitches[i];
            if( pitch.abcName().equals(token)){
                return pitch;
            }
        }
        throw new Exception("### PITCH " + token + "NOT FOUND");
    }
    private static void display(Pitch[] pitches){
        for( int i = 0; i < pitches.length; i = i +1){
            System.out.println(pitches[i].toString());
        }
    }
    private static void playMelody(String input, Pitch[] pitches) throws Exception{
        Scanner scanner = new Scanner(input);
        while( scanner.hasNext()){
            String token =  scanner.next();
            String pitchName;
            String duration = "";
            if ( token.indexOf(",") < 0 ) {
                pitchName = token.substring(0,1);
                duration = token.substring(1);
            }else{
                pitchName = token.substring(0,2);
                duration = token.substring(2);
            }
            if (duration.length() == 0 ) { duration = "1";}
            Pitch pitch = find(pitchName, pitches);
            pitch.play(duration);
        }
    }
    static private void showErrorMessage(String message){
        miro.setVisible(false);
        JOptionPane.showMessageDialog(null, message);
    }

    private static void intialization(){

        miro = new SPainter("Chromesthesia", 500, 500);
        miro.setVisible(false);
        miro.setBrushWidth(7);

        pitches =  establishPitches(miro);
        display(pitches);
    }

    private static String getInput(){
        miro.setVisible(false);
        String label = "Please enter a melody in ABC notation, or EXIT ...     ";
        String input = JOptionPane.showInputDialog(null, label);
        miro.setVisible(true);
        if (input == null ) {input = "";}
        return input;
    }
    static private void cleanup(){
        System.exit(0);
    }
}