How to get the top level container of a JComponent?

问题

Is there a way to get the top level container of a component? For example I have a JToolbar and I want to know at one monent the top level container of that JToolbar is my JFrame or is its own window, a JDialog.

回答1:

SwingUtilities.windowForComponent(...);

回答2:

If the component has been added to the hierarchy, you can look up the top-level container by recursively calling getParent:

Container c = toolbar;
while ( c.getParent() != null )
{
  c = c.getParent();
}

if ( c instanceof JFrame )
{
  //...
}

来源：https://stackoverflow.com/questions/2660943/how-to-get-the-top-level-container-of-a-jcomponent