java - HttpURLConnection send header authorization -

i struggling send requests authorization header using httpurlconnection. error code 400 returned.

i successful okhttpclient requested not use dependencies.

here code:

public static string getrequserprofiles() throws ioexception {      url url = new url(urlstring);     httpurlconnection urlconnection = (httpurlconnection) url.openconnection();      urlconnection.setdooutput(true);     urlconnection.setrequestmethod("get");     urlconnection.setrequestproperty("content-type", "application/" + "json");     urlconnection.setrequestproperty("authorization", "bearer " + management_token);      urlconnection.connect();      if (urlconnection.getresponsecode() != 200) {         throw new runtimeexception("failed : http error code : "                 + urlconnection.getresponsecode());     }      string assembledoutput = "";      bufferedreader responsebuffer = new bufferedreader(new inputstreamreader(             (urlconnection.getinputstream())));      string output;     system.out.println("output server:\n");     while ((output = responsebuffer.readline()) != null) {         system.out.println(output);         assembledoutput = assembledoutput + output;     }      urlconnection.disconnect();      return assembledoutput; } 

edit:

everything working -

the problem in:

urlconnection.setdooutput(true); 

setdooutput(true) : declares sending body request. requests not require body, can set false or commented out. instead used post, patch, put etc... (requests require body).

also note:

urlconnection.setrequestmethod("get"); 

does not need declared if sending request (although left in code readability)

i suspect if include setdooutput(true) , no request method specified, method default post request.

i have developed library can use it.

https://github.com/kksingla/fetchjson

you can view code here if dont want use dependency