import java.awt.Color;
import javax.swing.JFrame;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.geom.Rectangle2D;
import javax.swing.JPanel;
import java.awt.geom.Ellipse2D;

public class Main extends JFrame {
	private static final long serialVersionUID = 1L;

	PadClass p = new PadClass();
	BallClass b = new BallClass();

	public Main() {
		setSize(300, 200);
		setTitle("First bouncy game");
		setResizable(false);
		getContentPane().setBackground(Color.orange);
		//add(b);
		add(new PadClass());
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		setVisible(true);
	}

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

public class PadClass extends JPanel implements KeyListener {
	private static final long serialVersionUID = 1L;

	int x = 130, y = 165, velx = 3;

	public PadClass() {
		addKeyListener(this);
		setFocusable(true);

	}

	public void paintComponent(Graphics g) {
		super.paintComponent(g);
		Graphics2D g2 = (Graphics2D) g;
		g2.fill(new Rectangle2D.Double(x, y, 40, 10));
		repaint();
	}

	public void right() {
		x += velx;
	}

	public void left() {
		x -= velx;
	}

	public void keyPressed(KeyEvent e) {
		int key = e.getKeyCode();
		if (key == KeyEvent.VK_RIGHT) {
			right();
		}
		if (key == KeyEvent.VK_LEFT) {
			left();
		}
	}

	public void keyReleased(KeyEvent e) {}

	public void keyTyped(KeyEvent e) {}

}

public class BallClass extends JPanel{
	private static final long serialVersionUID = 1L;
	int x = 130;
	int y = 0;

	public BallClass (){
	}

	public void paintComponent(Graphics g) {
		super.paintComponent(g);
		Graphics2D g2 = (Graphics2D) g;
		g2.fill(new Ellipse2D.Double(x, y, 10, 10));
		repaint();
	}
}