JPanel size by inner components

Question

Is it possible to tell JPanel to set its size to fit all components that it contains? Something like pack() for JFrame.

edit: The trick with preferredSize d

Answer 1

By default Containers have a preferred size that matches the preferred layout size given by the container. So literally all you have to do is:

panel.setSize(panel.getPreferredSize());

Presumably you are doing something odd with the parent to stop the parent's layout manager doing the equivalent of this.