Untitled

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

class OnlineTest extends JFrame implements ActionListener {
    JButton btnNext, btnBookmark;
    JLabel label;
    ButtonGroup bg;
    int m[] = new int[15];
    JRadioButton radioButton[] = new JRadioButton[5];
    int current = 0, count = 0, x = 1, y = 1, now = 0;

    OnlineTest(String s) {
        super(s);
        label = new JLabel();
        add(label);
        bg = new ButtonGroup();

        for (int i = 0; i < 5; i++) {
            radioButton[i] = new JRadioButton();
            add(radioButton[i]);
            bg.add(radioButton[i]);
        }

        btnNext = new JButton("Next Question");
        btnBookmark = new JButton("Bookmark Question");
        btnNext.addActionListener(this);
        btnBookmark.addActionListener(this);
        add(btnNext);
        add(btnBookmark);
        set();
        label.setBounds(30, 40, 450, 20);
        radioButton[0].setBounds(50, 80, 450, 20);
        radioButton[1].setBounds(50, 110, 200, 20);
        radioButton[2].setBounds(50, 140, 200, 20);
        radioButton[3].setBounds(50, 170, 200, 20);
        btnNext.setBounds(100, 240, 150, 30);
        btnBookmark.setBounds(270, 240, 200, 30);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setLayout(null);
        setLocation(250, 100);
        setVisible(true);
        setSize(700, 600);
        Color c = new Color(255, 150, 0);
        getContentPane().setBackground(c);
    }

    /* handle all event */
    public void actionPerformed(ActionEvent e) {
        if (e.getSource() == btnNext) {
            if (qcheck())
                count = count + 1;
            current++;
            set();
            if (current == 14) {
                btnNext.setEnabled(false);
                btnBookmark.setText("Result");
            }
        }

        if (e.getActionCommand().equals("Bookmark Question")) {
            JButton bk = new JButton("Bookmark " + x);
            bk.setBounds(480, 20 + 30 * x, 150, 30);
            add(bk);
            bk.addActionListener(this);
            m[x] = current;
            x++;
            current++;
            set();
            if (current == 14)
                btnBookmark.setText("Score");
            setVisible(false);
            setVisible(true);
        }

        for (int i = 0, y = 1; i < x; i++, y++) {
            if (e.getActionCommand().equals("Bookmark" + y)) {
                if (qcheck())
                    count = count + 1;
                now = current;
                current = m[y];
                set();
                ((JButton) e.getSource()).setEnabled(false);
                current = now;
            }
        }

        if (e.getActionCommand().equals("Result")) {
            if (qcheck())
                count = count + 1;
            current++;
            JOptionPane.showMessageDialog(this, "You have answered " + count + " Questions correctly");
            System.exit(0);
        }
    }

    /* SET Questions with options */
    void set() {
        radioButton[4].setSelected(true);
        if (current == 0) {
            label.setText("Que1:  Who invented C++?");
            radioButton[0].setText("Dennis Ritchie");
            radioButton[1].setText("Ken Thompson");
            radioButton[2].setText("Brian Kernighan");
            radioButton[3].setText("Bjarne Stroustrup");
        }
        // ... Other question setup code ...

        label.setBounds(30, 40, 450, 20);
        for (int i = 0, j = 0; i <= 90; i += 30, j++)
            radioButton[j].setBounds(50, 80 + i, 200, 20);
    }

    /* declare right answers. */
    boolean qcheck() {
        if (current == 0)
            return (radioButton[3].isSelected());
        // ... Other answer checks ...

        return false;
    }

    public static void main(String s[]) {
        SwingUtilities.invokeLater(() -> {
            JFrame loginFrame = new JFrame("Login");
            JTextField usernameField = new JTextField();
            JPasswordField passwordField = new JPasswordField();
            JButton loginButton = new JButton("Login");

            JPanel panel = new JPanel();
            panel.setLayout(null);

            JLabel usernameLabel = new JLabel("Username:");
            usernameLabel.setBounds(50, 30, 80, 25);
            panel.add(usernameLabel);

            JLabel passwordLabel = new JLabel("Password:");
            passwordLabel.setBounds(50, 70, 80, 25);
            panel.add(passwordLabel);

            usernameField.setBounds(130, 30, 100, 25);
            panel.add(usernameField);

            passwordField.setBounds(130, 70, 100, 25);
            panel.add(passwordField);

            loginButton.setBounds(100, 120, 80, 25);
            panel.add(loginButton);

            loginFrame.add(panel);
            loginFrame.setSize(300, 200);
            loginFrame.setLocationRelativeTo(null);
            loginFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            loginFrame.setVisible(true);

            loginButton.addActionListener(e -> {
                String username = usernameField.getText();
                String password = new String(passwordField.getPassword());
                // Add your authentication logic here, e.g., checking against a predefined username and password
                if (username.equals("yourUsername") && password.equals("yourPassword")) {
                    loginFrame.dispose(); // Close the login window
                    new OnlineTest("Online Exam Portal");
                } else {
                    JOptionPane.showMessageDialog(loginFrame, "Invalid login credentials");
                }
            });
        });
    }
}