Java Utililty Methods JFrame Parent

Container container = component.getParent();
if (container instanceof JFrame || container == null) {
    return (JFrame) container;
} else {
    return getParentFrame(container);

if (parent instanceof Frame) {
    return (Frame) parent;
Window window = SwingUtilities.windowForComponent(parent);
return (window instanceof Frame ? (Frame) window : null);

Container parent;
for (parent = source.getParent(); parent != null; parent = parent.getParent())
    if (parent instanceof JFrame)
        break;
if (parent == null)
    return null;
else
    return (JFrame) parent;
...

for (Frame frame : parentFrames) {
    if (frame instanceof JFrame) {
        return (JFrame) frame;
return null;

Container parent = c.getParent();
if (parent == null)
    return null;
else if (parent instanceof JFrame)
    return (JFrame) parent;
else
    return getParentFrame((JComponent) parent);

Component p = comp.getParent();
while (p != null) {
    if (p instanceof JFrame)
        return (JFrame) p;
    else
        p = p.getParent();
return null;
...

Container p = comp;
while (p != null && !(p instanceof Frame)) {
    p = p.getParent();
return p == null ? null : (Frame) p;

Window window = getParentWindowForComponent(comp);
Frame parentFrame = null;
if (window instanceof Frame) {
    parentFrame = (Frame) window;
return parentFrame;

if (comp instanceof Container)
    return (JInternalFrame) getParent((Container) comp, JInternalFrame.class);
else
    return null;

while (!((c instanceof Frame) || (c instanceof JFrame))) {
    if (c == null)
        return (null);
    else
        c = c.getParent();
return ((Frame) c);