Http 415 Unsupported Media type error with JSON

I am calling a REST service with a JSON request and it responds with a `HTTP 415 "Unsupported Media Type"` error. The request content type is set to `("Content-Type", "application/json; charset=utf8")`. It works fine if I don't include a JSON object in the request. I am using the `google-gson-2.2.4` library for JSON. I tried using a couple of different libraries but it made no difference. Can anybody please help me to resolve this? Here is my code: ``` public static void main(String[] args) throws Exception { JsonObject requestJson = new JsonObject(); String url = "xxx"; //method call for generating json requestJson = generateJSON(); URL myurl = new URL(url); HttpURLConnection con = (HttpURLConnection)myurl.openConnection(); con.setDoOutput(true); con.setDoInput(true); con.setRequestProperty("Content-Type", "application/json; charset=utf8"); con.setRequestProperty("Accept", "application/json"); con.setRequestProperty("Method", "POST"); OutputStream os = con.getOutputStream(); os.write(requestJson.toString().getBytes("UTF-8")); os.close(); StringBuilder sb = new StringBuilder(); int HttpResult =con.getResponseCode(); if(HttpResult ==HttpURLConnection.HTTP_OK){ BufferedReader br = new BufferedReader(new InputStreamReader(con.getInputStream(),"utf-8")); String line = null; while ((line = br.readLine()) != null) { sb.append(line + "\n"); } br.close(); System.out.println(""+sb.toString()); }else{ System.out.println(con.getResponseCode()); System.out.println(con.getResponseMessage()); } } public static JsonObject generateJSON () throws MalformedURLException { String s = "http://www.example.com"; s.replaceAll("/", "\\/"); JsonObject reqparam=new JsonObject(); reqparam.addProperty("type", "arl"); reqparam.addProperty("action", "remove"); reqparam.addProperty("domain", "staging"); reqparam.addProperty("objects", s); return reqparam; } } ``` The value of `requestJson.toString()` is : `{"type":"arl","action":"remove","domain":"staging","objects":"http://www.example.com"}`