Why will Jcomponent Have add() And Remove() ways however part will Not?

[dukoolsharma]

Why the part will not have add() and remove() ways whereas Jcomponent Have add() And Remove() ways?

[JamesCherrill]

Hi
Sorry, but that question cannot be understood in english.
Can you try to explain it better please?

[JamesCherrill]

JComponent is the base class for all Swing components except the top-level containers(JFrame, JDialog, JApplet).
It does not define any add methods, but it does inherit a number of overloaded add methods from its underlying awt classes, viz
add(PopupMenu) and a number of variants on add(Component).
Those methods are inherited by all Swing components, even if they make no sense (eg add a component to a JLabel).
So I don't understand the question "Why the part will not have add() and remove() ways?"