http post / get requests

I have a micro project that is already built in netbeans. It has 2 classes total one Jform class and one public static void main class. No proper backend code has been made yet. the gui has one start button and one stop button and a text box. the start button needs to perform one post request. This post request requires 2 parameters (user + pass). the returned json response has a variable used in the follow up Get request. a loop is then started and details from the previous Get response are used in this loop (inside another get request). I just need the functionality for all of this to be coded in to the project. for someone experienced in http requests, this is hardly even an hours work. A test account has even been setup already. Upon acceptance, I will send the developer my project. Thanks Hendrik