Java Database Connectivity (JDBC)

I am new to MYSQL.I have coded a simple jdbc program in java to establish a connection with mysql DB.When i run this program it throws an error like


Error while connecting to databasejava.sql.SQLException: Access denied for user 'admin'@'localhost' (using password: YES)

With this i knew that we should have been granted to access all db in mysql,so i have used this command

mysql>grant all on prasad.* to admin@localhost;
here admin is password and localhost is my machine ip address.

Even i did like this , i am getting same error.Please help in this as soon as possible.Am i doing any wrong..?

Your help would be appreciated.