Java: Interface com Imagem

package interfacesgraficas;

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

public class InterfacesGraficas implements ActionListener{
    JFrame frame;

    public static void main(String[] args) {
        InterfacesGraficas gui = new InterfacesGraficas();
        gui.go();
    }
        public void go(){
            frame = new JFrame();
            frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

            JButton button = new JButton("clique aqui");
            button.addActionListener(this);

            MyDrawPanel drawPanel = new MyDrawPanel();

            frame.getContentPane().add(BorderLayout.SOUTH, button);
            frame.getContentPane().add(BorderLayout.CENTER, drawPanel);
            frame.setSize(300, 300);
            frame.setVisible(true);
        }
    @Override
        public void actionPerformed(ActionEvent event){
            frame.repaint();
        }

    }

===================================================================================================================================
package interfacesgraficas;

import javax.swing.*;
import java.awt.*;

public class MyDrawPanel extends JPanel{
    @Override
    public void paintComponent(Graphics g){
        /* Exemplo pg261
        g.setColor(Color.orange);
        g.fillRect(20,50,100,100);
        */
        Image image = new ImageIcon("C:\\Users\\fabio\\Documents\\NetBeansProjects\\mavenproject2\\InterfacesGraficas\\src\\interfacesgraficas\\pilha.jpg").getImage();
        g.drawImage(image, 3,4, this);

    }
}
==================================================================================================================================
package interfacesgraficas;

import javax.swing.*;
import java.awt.*;

public class MyDrawPanel extends JPanel{
    @Override
    public void paintComponent(Graphics g){
        /* Exemplo pg261
        g.setColor(Color.orange);
        g.fillRect(20,50,100,100);
        */

        /* Exemplo de uma imagem
        Image image = new ImageIcon("C:\\Users\\fabio\\Documents\\NetBeansProjects\\mavenproject2\\InterfacesGraficas\\src\\interfacesgraficas\\pilha.jpg").getImage();
        g.drawImage(image, 3,4, this);
        */
        /* Exemplo de um circulo que muda de cor */
        Graphics2D g2d = (Graphics2D) g;
        int red = (int) (Math.random() * 255);
        int green = (int) (Math.random() * 255);
        int blue = (int) (Math.random() * 255);

        Color startColor = new Color(red, green, blue);

        red = (int) (Math.random() * 255);
        green = (int) (Math.random() * 255);
        blue = (int) (Math.random() * 255);

        Color endColor = new Color(red, green, blue);
        GradientPaint gradient = new GradientPaint(70, 70, startColor,150,150, endColor);
        g2d.setPaint(gradient);
        g2d.fillOval(70, 70, 100, 100);
    }
}