An anyone help me to find the difference and relation between the following

Hi,
can anyone help me to find the difference and relation between the following methods of Swing :
a) validate()
b) invalidate()
c) revalidate()
d) repaint()

You'd be far ahead by opening up the API and Java turorial and your course book and learning for yourself, rather than, asking other to do your homework for you.
But if you have andwers already to go, then post them and ask if you have drawn appropriate conclusions.

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