Good Code

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.image.WritableRenderedImage;
import java.util.ArrayList;
import java.util.ConcurrentModificationException;
import java.util.List;

public class Dong implements ActionListener
{
    private final List<Window> windows = new ArrayList<>();
    boolean allClosed = false;
    Dong dong = this;
    boolean cracked = false;
    static final String code = "yesdaddy";
    static int progress = -1;

    Dong() throws InterruptedException
    {
        new Window();
        while (true)
        {
            if (!cracked)
            {
                Point mousePos = MouseInfo.getPointerInfo().getLocation();
                int mx = mousePos.x;
                int my = mousePos.y;
                try
                {
                    for (Window window : windows)
                    {
                        int w = window.getWidth();
                        int h = window.getHeight();
                        int x = window.getX() + w / 2;
                        int y = window.getY() + h / 2;
                        if (x == mx && y == my)
                            ++x;
                        double dx = x - mx;
                        double dy = y - my;
                        double mag = Math.sqrt(dx * dx + dy * dy);
                        double vx = dx / mag;
                        double vy = dy / mag;

                        double t = Double.POSITIVE_INFINITY;
                        double tt = 0;
                        if ((tt = -w / 2.0 / vx) > 0)
                        {
                            if (tt < t)
                                t = tt;
                        }
                        if ((tt = w / 2.0 / vx) > 0)
                        {
                            if (tt < t)
                                t = tt;
                        }
                        if ((tt = -h / 2.0 / vy) > 0)
                        {
                            if (tt < t)
                                t = tt;
                        }
                        if ((tt = h / 2.0 / vy) > 0)
                        {
                            if (tt < t)
                                t = tt;
                        }

                        t += 20;

                        if (mag > t)
                            continue;

                        double distanceFromEdge = mag - t;

                        double displaceX = -vx * distanceFromEdge;
                        double displaceY = -vy * distanceFromEdge;

                        window.setLocation((int) (window.getX() + displaceX), (int) (window.getY() + displaceY));
                    }
                } catch (ConcurrentModificationException ignored)
                {

                }
            }
            Thread.sleep(10);
        }
    }

    @Override public void actionPerformed(ActionEvent e)
    {
        new Window();
        cracked = false;
        progress = -1;
    }

    class Window extends JFrame
    {
        static final int w = 250, h = 150;

        Window()
        {
            Window relative = windows.isEmpty() ? null : windows.get(windows.size() - 1);
            setTitle("Expand Dong");
            JPanel panel = new JPanel();
            panel.setPreferredSize(new Dimension(w, h));
            setContentPane(panel);
            setResizable(false);
            pack();
            setLocationRelativeTo(relative);
            setLocation(getX() + 20, getY() + 20);
            if (getX() + getWidth() > Toolkit.getDefaultToolkit().getScreenSize().width)
                setLocation(0, getY());
            if (getY() + getHeight() > Toolkit.getDefaultToolkit().getScreenSize().height)
                setLocation(getX(), 0);
            windows.add(this);
            Window pointer = this;
            addWindowListener(new WindowAdapter()
            {
                @Override public void windowClosing(WindowEvent e)
                {
                    windows.remove(pointer);
                    if (!cracked)
                    {
                        new Window();
                        new Window();
                    }
                    if (windows.isEmpty())
                        System.exit(0);
                }
            });

            KeyAdapter ka = new KeyAdapter()
            {
                @Override public void keyTyped(KeyEvent e)
                {
                    if (cracked)
                        return;
                    char c = e.getKeyChar();
                    if (code.toLowerCase().charAt(++progress) != c)
                        progress = -1;
                    if (progress == code.length() - 1)
                        cracked = true;
                }
            };

            addKeyListener(ka);

            setLayout(null);
            JButton button = new JButton("OK");
            add(button);
            button.addActionListener(dong);
            button.setBounds(w / 2 - 50, h - 50, 100, 30);
            button.setFocusable(true);
            button.setFocusPainted(true);
            button.requestFocus();
            button.addKeyListener(ka);
            JLabel label = new JLabel("coconut creampies");
            add(label);
            label.setHorizontalAlignment(JLabel.CENTER);
            label.setBounds(w / 2 - 100, 30, 200, 30);
            //setIconImage(new ImageIcon(getClass().getResource("./icon.png")).getImage());
            setVisible(true);
        }
    }

    public static void main(String[] args) throws InterruptedException
    {
        Dong dong = new Dong();
        int i = 0;
        while (!dong.allClosed)
            Thread.sleep(10000);
    }
}