Flipping Bottle Code for JAVA

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

public class BottleFlipGame extends JFrame {
    private static final int WIDTH = 800;
    private static final int HEIGHT = 600;
    private static final int BOTTLE_WIDTH = 50;
    private static final int BOTTLE_HEIGHT = 100;

    private Timer timer;
    private int bottleX;
    private int bottleY;
    private int bottleSpeedY;

    public BottleFlipGame() {
        setTitle("Bottle Flip Game");
        setSize(WIDTH, HEIGHT);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setLocationRelativeTo(null);

        bottleX = WIDTH / 2 - BOTTLE_WIDTH / 2;
        bottleY = HEIGHT - BOTTLE_HEIGHT - 30;
        bottleSpeedY = 0;

        timer = new Timer(10, new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                update();
                repaint();
            }
        });

        addKeyListener(new java.awt.event.KeyAdapter() {
            public void keyPressed(java.awt.event.KeyEvent evt) {
                formKeyPressed(evt);
            }
        });

        setFocusable(true);
    }

    private void formKeyPressed(java.awt.event.KeyEvent evt) {
        if (evt.getKeyCode() == java.awt.event.KeyEvent.VK_SPACE && bottleSpeedY == 0) {
            bottleSpeedY = -5; // Jump when space is pressed
        }
    }

    private void update() {
        // Update bottle position
        bottleY += bottleSpeedY;
        bottleSpeedY += 1; // Gravity effect

        // Check if the bottle hits the ground
        if (bottleY > HEIGHT - BOTTLE_HEIGHT - 30) {
            bottleY = HEIGHT - BOTTLE_HEIGHT - 30;
            bottleSpeedY = 0;
        }
    }

    @Override
    public void paint(Graphics g) {
        super.paint(g);
        // Draw the bottle
        g.setColor(Color.BLUE);
        g.fillRect(bottleX, bottleY, BOTTLE_WIDTH, BOTTLE_HEIGHT);

        // Draw ground
        g.setColor(Color.GREEN);
        g.fillRect(0, HEIGHT - 30, WIDTH, 30);
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            @Override
            public void run() {
                BottleFlipGame bottleFlipGame = new BottleFlipGame();
                bottleFlipGame.setVisible(true);
                bottleFlipGame.timer.start();
            }
        });
    }
}