Remix

Make your own version of Offline Study Companion

Get an exact, working copy in your account, then change anything with chat.

Original by Kaviyaa

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Start fresh from this prompt

Builds a brand new app from the first prompt only, so later changes to the original are not included.

import javax.swing.*;
import java.awt.*;
import java.nio.file.*;
import java.util.ArrayList;
import java.util.List;

public class StudentStudyApp extends JFrame {

private final Path folder = Paths.get("StudentStudyData");
    private final Path notesFile = folder.resolve("notes.txt");
    private final Path tasksFile = folder.resolve("tasks.txt");

private JTextArea notesArea;
    private DefaultListModel<String> taskModel;
    private JLabel timerLabel;
    private Timer timer;
    private int seconds = 25 * 60;

public StudentStudyApp() {
        setTitle("Offline Student Study App");
        setSize(650, 450);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setLocationRelativeTo(null);

try {
            Files.createDirectories(folder);
        } catch (Exception e) {
            showError("Could not create data folder.");
        }

JTabbedPane tabs = new JTabbedPane();
        tabs.addTab("Study Notes", createNotesPanel());
        tabs.addTab("Study Planner", createTasksPanel());
        tabs.addTab("Practice Quiz", createQuizPanel());
        tabs.addTab("Study Timer", createTimerPanel());

add(tabs);
    }

private JPanel createNotesPanel() {
        JPanel panel = new JPanel(new BorderLayout(8, 8));
        notesArea = new JTextArea();
        notesArea.setLineWrap(true);
        notesArea.setWrapStyleWord(true);
        notesArea.setText(readFile(notesFile));

JButton save = new JButton("Save Notes");
        save.addActionListener(e -> {
            writeFile(notesFile, notesArea.getText());
            JOptionPane.showMessageDialog(this,
                    "Notes saved offline!");
        });

panel.add(new JScrollPane(notesArea), BorderLayout.CENTER);
        panel.add(save, BorderLayout.SOUTH);
        return panel;
    }

private JPanel createTasksPanel() {
        JPanel panel = new JPanel(new BorderLayout(8, 8));
        taskModel = new DefaultListModel<>();

for (String task : readFile(tasksFile).split("\n")) {
            if (!task.isBlank()) taskModel.addElement(task);
        }

JList<String> taskList = new JList<>(taskModel);
        JTextField input = new JTextField();

JButton add = new JButton("Add Task");
        JButton remove = new JButton("Remove Selected");

add.addActionListener(e -> {
            String task = input.getText().trim();
            if (!task.isEmpty()) {
                taskModel.addElement(task);
                input.setText("");
                saveTasks();
            }
        });

remove.addActionListener(e -> {
            int index = taskList.getSelectedIndex();
            if (index >= 0) {
                taskModel.remove(index);
                saveTasks();
            }
        });

JPanel top = new JPanel(new BorderLayout(5, 5));
        top.add(input, BorderLayout.CENTER);
        top.add(add, BorderLayout.EAST);

panel.add(top, BorderLayout.NORTH);
        panel.add(new JScrollPane(taskList), BorderLayout.CENTER);
        panel.add(remove, BorderLayout.SOUTH);
        return panel;
    }

private JPanel createQuizPanel() {
        JPanel panel = new JPanel();
        panel.setLayout(new BoxLayout(panel, BoxLayout.Y_AXIS));

JLabel question = new JLabel(
                "1. Which keyword creates a class in Java?");
        String[] options = {"A. method", "B. class",
                            "C. create", "D. object"};

ButtonGroup group = new ButtonGroup();
        JRadioButton[] buttons = new JRadioButton[4];

for (int i = 0; i < options.length; i++) {
            buttons[i] = new JRadioButton(options[i]);
            group.add(buttons[i]);
            panel.add(buttons[i]);
        }

JButton check = new JButton("Check Answer");
        check.addActionListener(e -> {
            if (!buttons[0].isSelected()
                    && !buttons[1].isSelected()
                    && !buttons[2].isSelected()
                    && !buttons[3].isSelected()) {
                JOptionPane.showMessageDialog(this,
                        "Please select an answer.");
            } else {
                JOptionPane.showMessageDialog(this,
                        buttons[1].isSelected()
                        ? "Correct! Score: 1/1"
                        : "Incorrect. Correct answer: B. class");
            }
        });

panel.add(Box.createVerticalStrut(15));
        panel.add(question);
        panel.add(check);
        return panel;
    }

private JPanel createTimerPanel() {
        JPanel panel = new JPanel(new FlowLayout());

timerLabel = new JLabel("25:00");
        timerLabel.setFont(new Font("Arial", Font.BOLD, 38));

JButton start = new JButton("Start");
        JButton pause = new JButton("Pause");
        JButton reset = new JButton("Reset");

timer = new Timer(1000, e -> {
            if (seconds > 0) {
                seconds--;
                updateTimer();
            } else {
                timer.stop();
                JOptionPane.showMessageDialog(this,
                        "Study session completed!");
            }
        });

start.addActionListener(e -> timer.start());
        pause.addActionListener(e -> timer.stop());
        reset.addActionListener(e -> {
            timer.stop();
            seconds = 25 * 60;
            updateTimer();
        });

panel.add(timerLabel);
        panel.add(start);
        panel.add(pause);
        panel.add(reset);
        return panel;
    }

private void updateTimer() {
        timerLabel.setText(String.format("%02d:%02d",
                seconds / 60, seconds % 60));
    }

private void saveTasks() {
        List<String> tasks = new ArrayList<>();
        for (int i = 0; i < taskModel.size(); i++) {
            tasks.add(taskModel.get(i));
        }
        writeFile(tasksFile, String.join("\n", tasks));
    }

private String readFile(Path file) {
        try {
            return Files.exists(file)
                    ? Files.readString(file) : "";
        } catch (Exception e) {
            return "";
        }
    }

private void writeFile(Path file, String data) {
        try {
            Files.writeString(file, data);
        } catch (Exception e) {
            showError("Unable to save data.");
        }
    }

private void showError(String message) {
        JOptionPane.showMessageDialog(this, message);
    }

public static void main(String[] args) {
        SwingUtilities.invokeLater(() -> {
            StudentStudyApp app = new StudentStudyApp();
            app.setVisible(true);
        });
    }
}

Start fresh from this prompt

Builds a brand new app from the first prompt only, so later changes to the original are not included.