NotesApp.java(檔案已創建)
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| 1 | + | import java.io.*; | |
| 2 | + | import java.util.ArrayList; | |
| 3 | + | import java.util.Scanner; | |
| 4 | + | ||
| 5 | + | class Note { | |
| 6 | + | private String title; | |
| 7 | + | private String content; | |
| 8 | + | ||
| 9 | + | public Note(String title, String content) { | |
| 10 | + | this.title = title; | |
| 11 | + | this.content = content; | |
| 12 | + | } | |
| 13 | + | ||
| 14 | + | // Getters and setters for note details | |
| 15 | + | } | |
| 16 | + | ||
| 17 | + | public class NotesApp { | |
| 18 | + | private static ArrayList<Note> notes = new ArrayList<>(); | |
| 19 | + | private static final String FILENAME = "notes.txt"; // File to save notes | |
| 20 | + | private static Scanner scanner = new Scanner(System.in); | |
| 21 | + | ||
| 22 | + | public static void main(String[] args) { | |
| 23 | + | loadNotes(); // Load saved notes from the file | |
| 24 | + | ||
| 25 | + | while (true) { | |
| 26 | + | displayMenu(); | |
| 27 | + | int choice = scanner.nextInt(); | |
| 28 | + | scanner.nextLine(); // Consume newline character | |
| 29 | + | ||
| 30 | + | switch (choice) { | |
| 31 | + | case 1: | |
| 32 | + | createNote(); | |
| 33 | + | break; | |
| 34 | + | case 2: | |
| 35 | + | viewNotes(); | |
| 36 | + | break; | |
| 37 | + | case 3: | |
| 38 | + | editNote(); | |
| 39 | + | break; | |
| 40 | + | case 4: | |
| 41 | + | deleteNote(); | |
| 42 | + | break; | |
| 43 | + | case 5: | |
| 44 | + | saveNotes(); // Save notes to the file | |
| 45 | + | System.out.println("Goodbye!"); | |
| 46 | + | System.exit(0); | |
| 47 | + | default: | |
| 48 | + | System.out.println("Invalid choice. Please try again."); | |
| 49 | + | } | |
| 50 | + | } | |
| 51 | + | } | |
| 52 | + | ||
| 53 | + | // Implement methods for creating, viewing, editing, and deleting notes | |
| 54 | + | ||
| 55 | + | private static void displayMenu() { | |
| 56 | + | System.out.println("\nNotes Keeping App"); | |
| 57 | + | System.out.println("1. Create a new note"); | |
| 58 | + | System.out.println("2. View saved notes"); | |
| 59 | + | System.out.println("3. Edit a note"); | |
| 60 | + | System.out.println("4. Delete a note"); | |
| 61 | + | System.out.println("5. Exit"); | |
| 62 | + | System.out.print("Enter your choice: "); | |
| 63 | + | } | |
| 64 | + | ||
| 65 | + | private static void loadNotes() { | |
| 66 | + | try (BufferedReader reader = new BufferedReader(new FileReader(FILENAME))) { | |
| 67 | + | String line; | |
| 68 | + | while ((line = reader.readLine()) != null) { | |
| 69 | + | String[] parts = line.split("\\|"); | |
| 70 | + | if (parts.length == 2) { | |
| 71 | + | notes.add(new Note(parts[0], parts[1])); | |
| 72 | + | } | |
| 73 | + | } | |
| 74 | + | } catch (IOException e) { | |
| 75 | + | // Handle file loading errors, or create the file if it doesn't exist | |
| 76 | + | } | |
| 77 | + | } | |
| 78 | + | ||
| 79 | + | private static void saveNotes() { | |
| 80 | + | try (PrintWriter writer = new PrintWriter(new FileWriter(FILENAME))) { | |
| 81 | + | for (Note note : notes) { | |
| 82 | + | writer.println(note.getTitle() + "|" + note.getContent()); | |
| 83 | + | } | |
| 84 | + | } catch (IOException e) { | |
| 85 | + | e.printStackTrace(); | |
| 86 | + | } | |
| 87 | + | } | |
| 88 | + | } | |
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