Java - Imagen en jPanel

package capaNegocis;

import java.awt.Dimension;

import java.awt.Graphics;

import java.awt.Image;

import javax.swing.ImageIcon;

import javax.swing.JPanel;

public class Imagen extends javax.swing.JPanel{

    String ruta;

    public Imagen(int x, int y, String ruta){

        this.setSize(x, y);

        this.ruta = ruta;

    }

    public void paint(Graphics g){

        Dimension height = getSize();

        //ImageIcon img = new ImageIcon(getClass().getResource(ruta));

        Image imgExterna = new ImageIcon(ruta).getImage();

        g.drawImage(imgExterna, 0, 0, height.width, height.height, null);

        setOpaque(false);

        super.paintComponent(g);

    }

}

private void btnCargarImagen1ActionPerformed(java.awt.event.ActionEvent evt) {

        JFileChooser fc = new JFileChooser();

        fc.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);

         int seleccion = fc.showOpenDialog(this);

if (seleccion == JFileChooser.APPROVE_OPTION) {

            File fichero = fc.getSelectedFile();

            String ruta = fichero.getAbsolutePath();

            int x = jpImagen.getWidth();

            int y = jpImagen.getHeight();

            Imagen img = new Imagen(x, y, ruta);

            jpImagen.add(img);

            jpImagen.repaint();

        }

    }