Retrieving a client_credentials token in Java (verbose, non-refactored printing version)

ClientCredentialsSample.java

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;
import java.net.MalformedURLException;
import java.io.IOException;

import org.apache.http.client.HttpClient;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.client.AuthCache;
import org.apache.http.client.CredentialsProvider;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.HttpHost;
import org.apache.http.auth.AuthScope;
import org.apache.http.auth.UsernamePasswordCredentials;
import org.apache.http.client.protocol.HttpClientContext;
import org.apache.http.impl.auth.BasicScheme;
import org.apache.http.impl.client.BasicAuthCache;
import org.apache.http.impl.client.BasicCredentialsProvider;

public class ClientCredentialsSample {
	public static void main(String[] args) {
    try {

      CredentialsProvider credsProvider = new BasicCredentialsProvider();
      credsProvider.setCredentials(AuthScope.ANY,
        new UsernamePasswordCredentials("id", "secret"));
      AuthCache authCache = new BasicAuthCache();

      // Add AuthCache to the execution context
      final HttpClientContext context = HttpClientContext.create();
      context.setCredentialsProvider(credsProvider);
      context.setAuthCache(authCache);

      HttpClient httpClient = HttpClientBuilder.create().build();

  		HttpPost postRequest = new HttpPost("/token/url");
      HttpHost target = new HttpHost("oauth.host.com", 443, "https");
      authCache.put(target, new BasicScheme());
      List<NameValuePair> paramList = new ArrayList<NameValuePair>();
      paramList.add(new BasicNameValuePair("grant_type", "client_credentials"));
      paramList.add(new BasicNameValuePair("scope", "a_scope"));

      postRequest.setHeader("Content-Type", "application/x-www-form-urlencoded");
      postRequest.setEntity(new UrlEncodedFormEntity(paramList));

  		HttpResponse response = httpClient.execute(target, postRequest, context);

  		BufferedReader br = new BufferedReader(
                          new InputStreamReader((response.getEntity().getContent())));

  		String output;
  		System.out.println("Output from Server .... \n");
  		while ((output = br.readLine()) != null) {
  			System.out.println(output);
  		}

  		httpClient.getConnectionManager().shutdown();

  	  } catch (MalformedURLException e) {

  		e.printStackTrace();

  	  } catch (IOException e) {

  		e.printStackTrace();

  	  }

	}
}