title: Rest api call and POST request (java)
body: <p>I am pretty new concerning REST api and POST request. 
  I have the url of a REST api. I need to access to this api by doing an API call in JAVA thanks to a client id and a client secret (I found a way to hash the client secret). However, as I am new I don't know how to do that api call. I did my research during this all day on internet but I found no tutorial, website or anything else about how to do an api call. So please, does anyone know a tutorial or how to do that? (if you also have something about POST request it would be great)</p>
  
  <p>I would be very thankful.</p>
  
  <p>Thank you very much for your kind attention.</p>
  
  <p>Sassir</p>