java - Display multiple images

I need to show images and images numbers are unknown - maybe 5 maybe 10 maybe more and I have no idea how I should display them.

This is my code and display only one image.

public class NewClass extends JFrame {

    public static void main(String []args) throws IOException{
        BufferedImage img=ImageIO.read(new File("D:\\A-programmer-Life.jpg"));
        ImageIcon icon=new ImageIcon(img);
        JFrame frame=new JFrame();
        frame.setLayout(new FlowLayout());

        frame.setSize(500,500);
        JLabel lbl=new JLabel();
        lbl.setIcon(icon);
        frame.add(lbl);
        frame.setVisible(true);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);  
    }
}