keus

package ballz;

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;
import java.io.File;
import java.io.IOException;

import javax.imageio.ImageIO;
import javax.swing.*;

public class MyApplication {

	MyFrame frame = new MyFrame();

	public static void main(String[] args) {
		try {
			UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
		} catch (Exception e) {
			e.printStackTrace();
		}
		new MyApplication();
	}

}

class MyFrame extends JFrame {

	MyPanel panel = new MyPanel();

	public MyFrame() {
		this.setTitle("Test Application");
		this.setSize(800, 600);
		this.setLocationRelativeTo(null);
		this.setResizable(false);
		this.getContentPane().add(panel);
		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		this.setVisible(true);
	}

}

class MyPanel extends JPanel implements MouseListener, MouseMotionListener {

	private final int IMAGE_WIDTH = 100;
	private final int IMAGE_HEIGHT = 100;

	private Image ball;
	private int ballX = 0, ballY = 0;
	private int ballXDiff = 0, ballYDiff = 0;
	private Timer tm;

	public MyPanel() {
		try {
			ball = ImageIO.read(new File("src/ballz/ball.png"));
		} catch (IOException e) {
			e.printStackTrace();
		}
		this.addMouseListener(this);
		this.addMouseMotionListener(this);
		tm = new Timer(10, new ActionListener() {

			@Override
			public void actionPerformed(ActionEvent e) {
				repaint();
			}
		});
	}

	@Override
	protected void paintComponent(Graphics g) {
		super.paintComponent(g);
		g.drawImage(ball, ballX, ballY, null);
	}

	@Override
	public void mouseDragged(MouseEvent e) {
		if (getCursor().getType() == Cursor.HAND_CURSOR) {
			ballX = e.getX() - ballXDiff;
			ballY = e.getY() - ballYDiff;
		}
	}

	@Override
	public void mouseMoved(MouseEvent e) {
		if (e.getX() >= ballX && e.getX() <= ballX + 100 && e.getY() >= ballY && e.getY() <= ballY + 100) {
			setCursor(new Cursor(Cursor.HAND_CURSOR));
		} else {
			setCursor(new Cursor(Cursor.DEFAULT_CURSOR));
		}
	}

	@Override
	public void mouseClicked(MouseEvent e) {
	}

	@Override
	public void mouseEntered(MouseEvent e) {
	}

	@Override
	public void mouseExited(MouseEvent e) {
	}

	@Override
	public void mousePressed(MouseEvent e) {
		if (getCursor().getType() == Cursor.HAND_CURSOR) {
			ballXDiff = e.getX() - ballX;
			ballYDiff = e.getY() - ballY;
			tm.start();
		}
	}

	@Override
	public void mouseReleased(MouseEvent e) {
		tm.stop();
	}

}