In the link below
they are saying how to create a default web application.(changing weblogic.xml for .war file).But i could not do that.
It is in .war format i do not want to unpack it and change the weblogic.xml(context-root)
.I tried from console going to that particular webapplication after that configuration-->Descriptor
--> i can find web.xml and weblogic.xml.I clicked on it but it just shows me the file.It does not allow me to edit it .Any of the experts know how to do this and give me the format of context-root that i have to add to make that particular application as default web application.