public class ImagePanel extends JPanel{
    int[][] matrix = new int[1920][1080];
    private BufferedImage image;

    public ImagePanel() throws IOException{
        image = new BufferedImage(1920,1080, BufferedImage.TYPE_INT_RGB);
       createPicture(1920,1080);

       for(int y=0;y<1080;y++){
           for(int x=0;x<1920;x++){
               image.setRGB(x,y,matrix[x][y]);
           }
           this.repaint();
           TimeUnit.MILLISECONDS.sleep(100);
       }