JAVA Container and Component interaction

Question

So in JAVA, given that a Container can also be called as a component. Why cant i put a JFrame (Container) inside another JFrame (Container/component)?

Answer 1

Yes, you can put a container inside of another container.

That is extremely common, one of the core principles of the component/container hierarchy and quite essential to build any kind of non-trivial UI.

However

• every component can have only one (direct) container. If you add it to a second one, it will be removed from its original container.

• JFrame is a top-level container. It cannot be contained in other containers.