Visit home page http://oracleadfhowto.blogspot.com/2013/03/consuming-web-service-using-web-service.html. To create a simple web service visit http://oracleadfhowto.blogspot.in/2013/03/create-simple-web-service-using-oracle.html. Make use of web service operations to display data in a page and use the data to populate a list of values or a combo box by making use of web service data control in Oracle JDeveloper 11.1.2.3.0.