Java GMail: Get a specific message (format="minimal")

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Gets a specific message using format=minimal.

Documentation: https://developers.google.com/gmail/api/v1/reference/users/messages/get

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[])
  {
    CkRest rest = new CkRest();
    boolean success;

    //   Provide a previously obtained OAuth2 access token.
    CkOAuth2 oauth2 = new CkOAuth2();
    oauth2.put_AccessToken("OAUTH2_ACCESS_TOKEN");
    rest.SetAuthOAuth2(oauth2);

    success = rest.Connect("www.googleapis.com",443,true,true);
    if (success != true) {
        System.out.println(rest.lastErrorText());
        return;
        }

    rest.AddPathParam("messageId","15fc237e79da4174");

    rest.AddQueryParam("format","minimal");

    CkStringBuilder sbJson = new CkStringBuilder();
    success = rest.FullRequestNoBodySb("GET","/gmail/v1/users/me/messages/messageId",sbJson);
    if (success != true) {
        System.out.println(rest.lastErrorText());
        return;
        }

    if (rest.get_ResponseStatusCode() != 200) {
        System.out.println("Received error response code: " + rest.get_ResponseStatusCode());
        System.out.println("Response body:");
        System.out.println(sbJson.getAsString());
        return;
        }

    CkJsonObject json = new CkJsonObject();
    json.LoadSb(sbJson);

    //  The following code parses the JSON response.
    //  A sample JSON response is shown below the sample code.
    String id;
    String threadId;
    String snippet;
    String historyId;
    String internalDate;
    int sizeEstimate;
    int i;
    int count_i;
    String strVal;

    id = json.stringOf("id");
    threadId = json.stringOf("threadId");
    snippet = json.stringOf("snippet");
    historyId = json.stringOf("historyId");
    internalDate = json.stringOf("internalDate");
    sizeEstimate = json.IntOf("sizeEstimate");
    i = 0;
    count_i = json.SizeOfArray("labelIds");
    while (i < count_i) {
        json.put_I(i);
        strVal = json.stringOf("labelIds[i]");
        i = i+1;
        }

    System.out.println("Example Completed.");
  }
}

Sample JSON Response Body

{
  "id": "15fc237e79da4174",
  "threadId": "15fc237e79da4174",
  "labelIds": [
    "IMPORTANT",
    "SENT",
    "INBOX"
  ],
  "snippet": "This is a test email with 2 attachments.",
  "historyId": "1582",
  "internalDate": "1510791964000",
  "sizeEstimate": 11153
}