Moving A Ball With Arrow Keys

Here we make an interactive animation. You can use the arrow keys to control the position of the ball, moving it up, down, left, or right.

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

public class Main extends JPanel implements KeyListener {
    private int x = 150; // Ball's initial X position
    private int y = 150; // Ball's initial Y position

    public Main() {
        JFrame frame = new JFrame("Move the Ball with Arrow Keys");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(400, 400);
        frame.add(this);
        frame.addKeyListener(this); // Listen for key presses
        frame.setVisible(true);
    }

    @Override
    protected void paintComponent(Graphics g) {
        super.paintComponent(g); // Clear the panel
        g.setColor(Color.GREEN); // Set ball color
        g.fillOval(x, y, 50, 50); // Draw the ball at the current position
    }

    @Override
    public void keyPressed(KeyEvent e) {
        int key = e.getKeyCode(); // Get the key that was pressed
        if (key == KeyEvent.VK_UP) { // Move up
            y -= 10;
        } else if (key == KeyEvent.VK_DOWN) { // Move down
            y += 10;
        } else if (key == KeyEvent.VK_LEFT) { // Move left
            x -= 10;
        } else if (key == KeyEvent.VK_RIGHT) { // Move right
            x += 10;
        }
        repaint(); // Update the screen with the new position
    }

    @Override
    public void keyReleased(KeyEvent e) { }

    @Override
    public void keyTyped(KeyEvent e) { }

    public static void main(String[] args) {
        new Main();
    }
}