Read/write access to database

I am designing a database application using java and DB2.i want to know that if one user is accessing(write) a particular table in the database then how to prevent other users to do any update in the same table(give him only read option).if he try to update a message should pop up that other user is currently having the write permission on that particular table.
Thanx
Jigs

thanx for the help
i'll go through the documentation and get back if i have any doubts
thanks
jignesh

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Dear All,
Hi,
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nef9877 wrote:
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Read/write access to database

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