public static void main(String[] args) { IPanel mosaic = new IPanel(); mosaic.setLayout(new GridLayout(2,1)); mosaic.add(new Title("A Sine Wave")); mosaic.add(new Wave(5.0)); mosaic.setPreferredSize(new Dimension(800,500)); JFrame frame = new JFrame(); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.add(mosaic); frame.pack(); frame.setVisible(true); try { mosaic.paintToPng(1000,3,"junk.png"); } catch (IOException ioe) { throw new RuntimeException(ioe); } } }