Trying to Make a Program with Java to Save Music Scores

Hi! I'm trying to make a program in Java with the idea to save and load information from music scores. I have a couple of problems and I don't know if anyone could help me. First of all, I have a problem adding scores to the program. I have no idea how the program is supposed to store all the information and save everything correctly. Also, I don't know how to count the total number of scores. As far as I understand, I need to implement a program that counts how many scores are there in the database. Secondly, I need to load the scores. In this case, I don't know how to sort the scores by date so that the latest scores are shown first. Also, I don't know how to save a file with all the scores and load it. I'm familiar with the code for the program, but I don't know enough to solve these two problems. Here is an example of how the program should work: ``` public class MusicScoreApp { public static void main(String[] args) throws FileNotFoundException, IOException { ArrayList<Score> scores = new ArrayList<>(); ArrayList<String> genres = new ArrayList<>(); ArrayList<String> moods = new ArrayList<>(); // Read from scores file genGenre(genres); genMood(moods); File scoreFile = new File("scores.txt"); if (!scoreFile.exists()) { scoreFile.createNewFile(); } if (scoreFile.length() != 0) { scores = readScores(scoreFile); } // Start the program scores = run(scores, genres, moods); // Save scores to file saveScores(scores, scoreFile); } // readScore reads a score from the console public static Score readScore(ArrayList<String> genres, ArrayList<String> moods) { Scanner s = new Scanner(System.in); System.out.println("Enter score name: "); String scoreName = s.nextLine(); System.out.println("Enter genre: "); String genre = s.nextLine(); System.out.println("Enter mood: "); String mood = s.nextLine(); System.out.println("Enter date: "); String date = s.nextLine(); Score score = new Score(scoreName, genre, mood, date); return score; } // addScore adds score to the scores ArrayList public static ArrayList<Score> addScore(ArrayList<Score> scores, ArrayList<String> genres, ArrayList<String> moods, ArrayList<String> actions) { Score score = readScore(genres, moods); scores.add(score); System.out.println("Score added successfully!"); return scores; } // delScore deletes score from the scores ArrayList public static ArrayList<Score> delScore(ArrayList<Score> scores, ArrayList<String> genres, ArrayList<String> moods, ArrayList<String> actions, Scanner s) { System.out.println("Enter the number of the score to delete: "); int scoreNum = s.nextInt(); s.nextLine(); if (scoreNum > scores.size()) { System.out.println("Score not found!"); return scores; } scores.remove(scoreNum-1); System.out.println("Score deleted!"); return scores; } // printScore prints a score public static void printScore(Score score) { System.out.println("Score Name: " + score.getScoreName()); System.out.println("Genre: " + score.getGenre()); System.out.println("Mood: " + score.getMood()); System.out.println("Date: " + score.getDate()); } // printScores prints all scores public static void printScores(ArrayList<Score> scores) { for (int i = 0; i < scores.size(); i++) { System.out.println("Score # " + (i+1)); printScore(scores.get(i)); } } // saveScores saves the scores into scores.txt public static void saveScores(ArrayList<Score> scores, File scoreFile) throws IOException { FileWriter writer = new FileWriter(scoreFile); for (Score score: scores) { writer.write(score.getScoreName() + "\n"); writer.write(score.getGenre() + "\n"); writer.write(score.getMood() + "\n"); writer.write(score.getDate() + "\n\n"); } writer.close(); } // readScores reads the scores from scores.txt public static ArrayList<Score> readScores(File scoreFile) throws FileNotFoundException { Scanner s = new Scanner(scoreFile); ArrayList<Score> scores = new ArrayList<>(); while (s.hasNextLine()) { String scoreName = s.nextLine(); String genre = s.nextLine(); String mood = s.nextLine(); String date = s.nextLine(); Score score = new Score(scoreName, genre, mood, date); scores.add(score); s.nextLine(); // For the newline after each score } s.close(); return scores; } // genGenre generates genres public static void genGenre(ArrayList<String> genres) { genres.add("Classical"); genres.add("Jazz"); genres.add("Rock"); genres.add("Electronic"); genres.add("Hip Hop"); genres.add("Other"); } // genMood generates moods public static void genMood(ArrayList<String> moods) { moods.add("Happy"); moods.add("Sad"); moods.add("Angry"); moods.add("Calm"); moods.add("Scary"); moods.add("Other"); } // genActions generates actions public static void genActions(ArrayList<String> actions) { actions.add("Add a score"); actions.add("Delete a score"); actions.add("View scores"); actions.add("Quit the program"); } // actionMenu prints the actions public static void actionMenu(ArrayList<String> actions) { for (int i = 0; i < actions.size(); i++) { System.out.println((i+1) + ". " + actions.get(i)); } } // chooseAction chooses an action public static int chooseAction(Scanner s, ArrayList<String> actions) { System.out.println("Choose an action: "); int action = s.nextInt(); s.nextLine(); if (action > actions.size()) { System.out.println("Invalid action. Please try again."); actionMenu(actions); action = chooseAction(s, actions); } return action; } // run runs the program public static ArrayList<Score> run(ArrayList<Score> scores, ArrayList<String> genres, ArrayList<String> moods) { ArrayList<String> actions = new ArrayList<>(); genActions(actions); Scanner s = new Scanner(System.in); while (true) { actionMenu(actions); int action = chooseAction(s, actions); if (action == 1) { scores = addScore(scores, genres, moods, actions); } else if (action == 2) { scores = delScore(scores, genres, moods, actions, s); } else if (action == 3) { printScores(scores); } else if (action == 4) { break; } } return scores; } } ``` ``` public class Score { private String scoreName; private String genre; private String mood; private String date; // Constructor public Score(String scoreName, String genre, String mood, String date) { this.scoreName = scoreName; this.genre = genre; this.mood = mood; this.date = date; } // Getters public String getScoreName() { return this.scoreName; } public String getGenre() { return this.genre; } public String getMood() { return this.mood; } public String getDate() { return this.date; } } ``` If someone knows how to add scores to the program and load scores, it would be a great help!

Trying to Make a Program with Java to Save Music Scores

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