Problem in apache tomact 6.0

[Uttpal Kachhawa]

-- Hi,
        I AM GETTING THAT ERROR PLZ GIVE ME SOLUTION

Port 8009 required by Tomcat v6.0 Server at localhost is already in use.
The server may already be running in another process, or a system process
may be using the port. To start this server you will need to stop the other
process or change the port number(s).
-- 
*I BELIEVE IN TIT FOR TAT*