GUI.java

import javax.swing.*;

public class GUI {

    public static void main(String[] args) {
        JFrame frame = new JFrame("Notetaking Tool");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(600, 500);
        frame.setLayout(null);

        JPanel panel = new JPanel(null);
        panel.setBounds(0, 0, 600, 500);
        panel.setBackground(new java.awt.Color(245, 245, 255));

        JLabel titleLabel = new JLabel("Note Title:");
        titleLabel.setBounds(30, 20, 80, 25);
        titleLabel.setFont(new java.awt.Font("Segoe UI", java.awt.Font.PLAIN, 14));

        JTextField titleField = new JTextField();
        titleField.setBounds(120, 20, 200, 28);
        titleField.setFont(new java.awt.Font("Segoe UI", java.awt.Font.PLAIN, 14));
        titleField.setBackground(new java.awt.Color(255, 255, 240));
        titleField.setBorder(javax.swing.BorderFactory.createCompoundBorder(
            javax.swing.BorderFactory.createLineBorder(new java.awt.Color(120, 120, 200), 2),
            javax.swing.BorderFactory.createEmptyBorder(4, 8, 4, 8)
        ));

        JLabel notesListLabel = new JLabel("Saved Notes:");
        notesListLabel.setBounds(350, 20, 100, 25);
        notesListLabel.setFont(new java.awt.Font("Segoe UI", java.awt.Font.PLAIN, 14));

        javax.swing.DefaultListModel<String> listModel = new javax.swing.DefaultListModel<>();
        JList<String> notesList = new JList<>(listModel);
        JScrollPane listScroll = new JScrollPane(notesList);
        listScroll.setBounds(350, 50, 200, 300);

        JLabel contentLabel = new JLabel("Note Content:");
        contentLabel.setBounds(30, 60, 120, 25);
        contentLabel.setFont(new java.awt.Font("Segoe UI", java.awt.Font.PLAIN, 14));

        JTextArea noteArea = new JTextArea();
        noteArea.setFont(new java.awt.Font("Segoe UI", java.awt.Font.PLAIN, 15));
        noteArea.setLineWrap(true);
        noteArea.setWrapStyleWord(true);
        noteArea.setBackground(new java.awt.Color(255, 255, 240));
        noteArea.setBorder(javax.swing.BorderFactory.createCompoundBorder(
            javax.swing.BorderFactory.createLineBorder(new java.awt.Color(120, 120, 200), 2),
            javax.swing.BorderFactory.createEmptyBorder(8, 8, 8, 8)
        ));
        JScrollPane areaScroll = new JScrollPane(noteArea);
        areaScroll.setBounds(30, 90, 290, 260);

        JButton saveButton = new JButton("Save Note");
        saveButton.setBounds(30, 370, 110, 32);
        saveButton.setBackground(new java.awt.Color(120, 120, 200));
        saveButton.setForeground(java.awt.Color.WHITE);
        saveButton.setFocusPainted(false);
        saveButton.setFont(new java.awt.Font("Segoe UI", java.awt.Font.BOLD, 14));
        saveButton.setBorder(javax.swing.BorderFactory.createLineBorder(new java.awt.Color(80, 80, 160), 2));
        saveButton.addMouseListener(new java.awt.event.MouseAdapter() {
            @Override
            public void mouseEntered(java.awt.event.MouseEvent evt) {
                saveButton.setBackground(new java.awt.Color(80, 80, 160));
            }
            @Override
            public void mouseExited(java.awt.event.MouseEvent evt) {
                saveButton.setBackground(new java.awt.Color(120, 120, 200));
            }
        });

        JButton clearButton = new JButton("Clear");
        clearButton.setBounds(150, 370, 80, 32);
        clearButton.setBackground(new java.awt.Color(200, 120, 120));
        clearButton.setForeground(java.awt.Color.WHITE);
        clearButton.setFocusPainted(false);
        clearButton.setFont(new java.awt.Font("Segoe UI", java.awt.Font.BOLD, 14));
        clearButton.setBorder(javax.swing.BorderFactory.createLineBorder(new java.awt.Color(160, 80, 80), 2));
        clearButton.addMouseListener(new java.awt.event.MouseAdapter() {
            @Override
            public void mouseEntered(java.awt.event.MouseEvent evt) {
                clearButton.setBackground(new java.awt.Color(160, 80, 80));
            }
            @Override
            public void mouseExited(java.awt.event.MouseEvent evt) {
                clearButton.setBackground(new java.awt.Color(200, 120, 120));
            }
        });

        JButton loadButton = new JButton("Load Note");
        loadButton.setBounds(240, 370, 110, 32);
        loadButton.setBackground(new java.awt.Color(120, 180, 120));
        loadButton.setForeground(java.awt.Color.WHITE);
        loadButton.setFocusPainted(false);
        loadButton.setFont(new java.awt.Font("Segoe UI", java.awt.Font.BOLD, 14));
        loadButton.setBorder(javax.swing.BorderFactory.createLineBorder(new java.awt.Color(80, 160, 80), 2));
        loadButton.addMouseListener(new java.awt.event.MouseAdapter() {
            @Override
            public void mouseEntered(java.awt.event.MouseEvent evt) {
                loadButton.setBackground(new java.awt.Color(80, 160, 80));
            }
            @Override
            public void mouseExited(java.awt.event.MouseEvent evt) {
                loadButton.setBackground(new java.awt.Color(120, 180, 120));
            }
        });

        // NoteManager for file operations
        NoteManager noteManager = new NoteManager();

        // Populate notes list
        java.util.List<String> notes = noteManager.listNotes();
        for (String n : notes) listModel.addElement(n);

        // Save note action
        saveButton.addActionListener(e -> {
            String title = titleField.getText().trim();
            String content = noteArea.getText();
            if (title.isEmpty()) {
                javax.swing.JOptionPane.showMessageDialog(frame, "Please enter a note title.");
                return;
            }
            try {
                noteManager.saveNote(title, content);
                if (!listModel.contains(title)) listModel.addElement(title);
                javax.swing.JOptionPane.showMessageDialog(frame, "Note saved.");
            } catch (Exception ex) {
                javax.swing.JOptionPane.showMessageDialog(frame, "Error saving note: " + ex.getMessage());
            }
        });

        // Clear action
        clearButton.addActionListener(e -> {
            titleField.setText("");
            noteArea.setText("");
        });

        // Load note action
        loadButton.addActionListener(e -> {
            String selected = notesList.getSelectedValue();
            if (selected == null) {
                javax.swing.JOptionPane.showMessageDialog(frame, "Select a note to load.");
                return;
            }
            try {
                String content = noteManager.loadNote(selected);
                titleField.setText(selected);
                noteArea.setText(content);
            } catch (Exception ex) {
                javax.swing.JOptionPane.showMessageDialog(frame, "Error loading note: " + ex.getMessage());
            }
        });

        // Double-click on list to load
        notesList.addMouseListener(new java.awt.event.MouseAdapter() {
            public void mouseClicked(java.awt.event.MouseEvent evt) {
                if (evt.getClickCount() == 2) {
                    String selected = notesList.getSelectedValue();
                    if (selected != null) {
                        try {
                            String content = noteManager.loadNote(selected);
                            titleField.setText(selected);
                            noteArea.setText(content);
                        } catch (Exception ex) {
                            javax.swing.JOptionPane.showMessageDialog(frame, "Error loading note: " + ex.getMessage());
                        }
                    }
                }
            }
        });

        // Add credit label at the bottom
        JLabel creditLabel = new JLabel("This project was made by Ishan");
        creditLabel.setFont(new java.awt.Font("Segoe UI", java.awt.Font.ITALIC, 12));
        creditLabel.setForeground(new java.awt.Color(120, 120, 120));
        creditLabel.setBounds(10, 440, 300, 20);

        // Add components to panel
        panel.add(titleLabel);
        panel.add(titleField);
        panel.add(notesListLabel);
        panel.add(listScroll);
        panel.add(contentLabel);
        panel.add(areaScroll);
        panel.add(saveButton);
        panel.add(clearButton);
        panel.add(loadButton);
        panel.add(creditLabel);
        frame.add(panel);

        frame.setVisible(true);
    }
}