My JDBC Application can't connect MySQL Server

What does it mean?
("Is there a MySQL server running on the mac
hine/port you are trying to connect to?)"
Problem occured on my application or Server?
Thanks

it means that ur driver isnot able to find the mysql server. so check that it is effectively running and then check the url u've given ('machine' and 'port' number - also if u're using mysql default, no port number is required in the url -)

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