I want to retrieve weather information of 'Chittagong' city of 'Bangladesh' country from "BBC.com/weather" from java application.
but i don't understand where from i should start.
Please give me suggestions.
Read the Java Tutorial about network programing.
You'll need to understand how to use Sockets, HTTPConnections, URLs and InputStream classes. Also reading about HTML and and the HTTP protocol will help you understand how clients and servers communicate.