(Java) Duplicate curl -u user:password with Chilkat HTTP

Demonstrates how to duplicate a curl command that uses the -u username:password option. (This assumes HTTP Basic Authentication, and Chilkat requires Basic authentication to be over a TLS connection.)

Duplicates the following curl command:

curl https://api.sandbox.paypal.com/v1/oauth2/token \
  -H "Accept: application/json" \
  -H "Accept-Language: en_US" \
  -u "Client-Id:Secret" \
  -d "grant_type=client_credentials"

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import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    //  It requires the Chilkat API to have been previously unlocked.
    //  See Global Unlock Sample for sample code.

    CkHttp http = new CkHttp();
    CkHttpRequest req = new CkHttpRequest();

    //  The AddHeader method corresponds to the curl "-H" argument.
    req.AddHeader("Accept","application/json");
    req.AddHeader("Accept-Language","en_US");

    //  The curl "-d" argument specifies the HTTP request body.  In this case,
    //  we're sending an application/x-www-form-urlencoded request, and therefore
    //  the body contains the URL-encoded query parameters.
    req.AddParam("grant_type","client_credentials");

    http.put_Login("PAYPAL_REST_API_CLIENT_ID");
    http.put_Password("PAYPAL_REST_API_SECRET");

    //  Sends a POST request where the Content-Type is application/x-www-form-urlencoded
    CkHttpResponse resp = http.PostUrlEncoded("https://api.sandbox.paypal.com/v1/oauth2/token",req);
    if (http.get_LastMethodSuccess() != true) {
        System.out.println(http.lastErrorText());
        return;
        }

    if (resp.get_StatusCode() != 200) {
        System.out.println("Error status code: " + resp.get_StatusCode());
        System.out.println(resp.bodyStr());

        return;
        }

    //  The JSON response is in the resp BodyStr property
    System.out.println(resp.bodyStr());
    System.out.println("-- Success.");
  }
}