Java drawimage on jlabel

[easycode]

Please i have a class that extends jlabel and draw on it using paintComponent as follows this is paintPhotos.java

package myApp;
import java.awt.*;
import javax.swing.*;
/**
*
* @author PAGOLINA
*/
public class paintPhotos extends javax.swing.JLabel {

public Image img; int w; int h;
public paintPhotos(Image img, int w, int h) {
this.img = img; this.w = w; this.h = h;
System.out.println("am paintclass");
}
@Override
public void paintComponent(Graphics p) {
System.out.println("am here");
super.paintComponent(p);
Graphics2D g2 = (Graphics2D) p;
p.drawImage(img, 0, 0, w, h, this);
}

}

when i try to draw from a constructor of another class like this (AddScore.java).

public AddScore() {
initComponents();
setLocationRelativeTo(null);
removeNotify();
setUndecorated(true);
Image imag = new ImageIcon(this.getClass().getResource("img/top_bg.jpg")).getImage();
showPix1.setLayout(new BorderLayout());
showPix1.add(new paintPhotos(imag,40,40), BorderLayout.CENTER);
}

the above work fine and draw the image as specified.

but when i try to draw the image from an actionperform event of another class (AddScore.java) like this.

private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
Image imag = new ImageIcon(this.getClass().getResource("img/top_bg.jpg")).getImage();
showPix1.setLayout(new BorderLayout());
showPix1.add(new paintPhotos(imag,20,20), BorderLayout.CENTER);
}

the above statement did not work as the paintcomponent is not working, what am i doing wrong?