Jdbc problem

[kate_2008]

hellow all
i really need help with mysql server with java (JDBC), when i try to connect to mysql, i got run time error

java.sql.SQLException: Cannot connect to MySQL server on localhost:3306. Is there a MySQL server running on the machine/port you are trying to connect to? (java.lang.NumberFormatException)
at com.mysql.jdbc.Connection.connectionInit(Unknown Source)
at com.mysql.jdbc.jdbc2.Connection.connectionInit(Unk nown Source)
at com.mysql.jdbc.Driver.connect(Unknown Source)
at java.sql.DriverManager.getConnection(DriverManager .java:620)
at java.sql.DriverManager.getConnection(DriverManager .java:200)
at Jdbc1.main(Jdbc1.java:13)
i will be very thanks for your helps....

thanks.......
Edit/Delete Message

[mbeattie]

Is mysql running? and is it configured to listen on port 3306? It may be set up for some socket connection only /tmp/something usually.