Java Utililty Methods JFrame

Rectangle r = null;
GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
GraphicsDevice[] gs = ge.getScreenDevices();
GraphicsDevice gd = w.getGraphicsConfiguration().getDevice();
if (gs.length > 0) {
    GraphicsDevice device = gs[0];
    if (device.isFullScreenSupported()) {
        System.out.println("Full screen supported"); 
...

if (System.getProperty("os.name").toLowerCase().indexOf("mac") != -1) {
    FileDialog fileDialog = new FileDialog(parent, "Select directory to dump source into", FileDialog.LOAD);
    fileDialog.setDirectory(startingDir);
    fileDialog.setVisible(true);
    if (fileDialog.getFile() != null) {
        return new File(fileDialog.getFile());
} else {
...

return (JFrame) SwingUtilities.getWindowAncestor(cmp);

JFrame frame = new JFrame(WINDOW_TITLE);
frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
frame.setLocationRelativeTo(null);
frame.setSize(width, height);
return frame;

JFrame f = new JFrame(title);
f.setContentPane(panel);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setSize(new Dimension(width, height));
return f;

if (window instanceof JFrame) {
    return (JFrame) window;
return null;

if (cmpnt == null) {
    throw new IllegalArgumentException("cmpnt == null");
Container cntr = cmpnt.getParent();
while (true) {
    if (cntr == null)
        break;
    if (cntr instanceof JFrame)
...

JDialog dlg;
if (frame == null)
    dlg = new JDialog(__frame, true);
else if (__modalDlg != null && __modalDlg.isVisible())
    dlg = null;
else
    dlg = __modalDlg = new JDialog(frame, true);
dlg.setModal(true);
...

for (Container p = c.getParent(); p != null; p = p.getParent()) {
    if (p instanceof JFrame) {
        return (JFrame) p;
return null;

do {
    theFrame = theFrame.getParent();
} while ((theFrame != null) && !(theFrame instanceof JFrame));
if (theFrame == null)
    theFrame = new JFrame();
return (JFrame) theFrame;