Java Development Tools

Hello,

I am getting the following error

javax.naming.NoInitialContextException: Need to specify class name in environment or system property, 
or as an applet parameter, or in an application resource file:  java.naming.factory.initial

I have the following

                InitialContext  ctx = new InitialContext();
                String datasource = (DataSource)ctx.lookup(name);

The above is called as a method from my public static void method.

Any idea how can I resolve this error