You will need to make sure that the ojdbc14.jar is on the java classpath for the application needing it for JDBC connections.
For web servers, the simplest way usually involves putting it into the lib folder under the WEB-INF folder of the web application.
And it's called JDBC, not JNDC, and stands for Java Data Base Connectivity. Have a look at the Java ApiDocs for the classes in java.sql. There are also hundreds of resources on the web for using JDBC. Google should help you here.
You've obviously already got some code since you say that when you tried to create a connection it couldn't find the driver. Maybe you code post the snippet of code if you still have problems.
Tim