Sathish, Welcome to JavaRanch! We ain't got many rules 'round these parts, but we do got one. Please change your display name to comply with The JavaRanch Naming Policy. Thanks Pardner! Hope to see you 'round the Ranch!
Take a look at HttpURLConnection and URL classes. They're what you want (you may also want Runnable and Thread to avoid long waits in your program while the network connection is open).
Remember that servlets are intended to run in the servlet container environment such as Tomcat, not as stand-alone programs. It is the servlet container that handles turning your HttpURLConnection into a request. Bill