src/Print.java
// change panel to qr code panel
change panel to qr code panel
change panel to qr code panel
private void jButton4ActionPerformed(java.awt.event.ActionEvent evt) {
        parentPanel.removeAll();
        parentPanel.add(qrcodePanel);
        parentPanel.repaint();
        parentPanel.revalidate();
    }
private void jButton4ActionPerformed ( java . awt . event . ActionEvent evt ) { parentPanel . removeAll ( ) ; parentPanel . add ( qrcodePanel ) ; parentPanel . repaint ( ) ; parentPanel . revalidate ( ) ; }
change panel to qr code panel
change panel to qr code panel
//GEN-FIRST:event_jButton4ActionPerformed