Valid formats for JDBC URLs

Format for JDBC URL with SID:

•jdbc:oracle:thin:@host:1521:sid
•jdbc:oracle:thin:user/password@host:1521:sid

Format for JDBC URL with Service Name:

•jdbc:oracle:thin:@//host:1521/servicename
•jdbc:oracle:thin:user/password@//host:1521/servicename

The difference is in the use of slashes (/) and colons (:)

Source: Oracle Documentation, note 832455.1