(Java) Update a Task's Status to "completed"

Demonstrates how to update a Google task's status to "completed".

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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[])
  {
    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    // Get the previously obtained access token.
    // See Get Google Tasks Access Token.

    CkFileAccess fac = new CkFileAccess();
    String accessToken = fac.readEntireTextFile("qa_data/tokens/googleTasks.txt","utf-8");
    if (fac.get_LastMethodSuccess() != true) {
        System.out.println(fac.lastErrorText());
        return;
        }

    boolean success;
    CkHttp http = new CkHttp();

    http.put_AuthToken(accessToken);

    String taskId = "MDM4MzQ4NTA3NDQwMDUxMzQ2OTQ6NzAwOTA4MDA1NzU2ODYwMzoyMDg3OTcyMDA1MTQ5NTA0";

    // Create the JSON to update the task status to completed.
    CkJsonObject json = new CkJsonObject();
    json.UpdateString("id",taskId);
    json.UpdateString("status","completed");

    // Specify the ID's for both the task list and the task.
    http.SetUrlVar("tasklist","MDM4MzQ4NTA3NDQwMDUxMzQ2OTQ6NzAwOTA4MDA1NzU2ODYwMzow");
    http.SetUrlVar("task",taskId);

    String url = "https://www.googleapis.com/tasks/v1/lists/{$tasklist}/tasks/{$task}";
    CkHttpResponse resp = http.PText("PUT",url,json.emit(),"utf-8","application/json",false,false);
    if (http.get_LastMethodSuccess() == false) {
        System.out.println(http.lastErrorText());
        return;
        }

    // Show the response body.
    System.out.println(resp.bodyStr());

    // Examine the response status code.
    System.out.println("response status code: " + resp.get_StatusCode());

    // Sample response:
    // Use this online tool to generate parsing code from sample JSON: 
    // Generate Parsing Code from JSON

    // 
    // {
    //  "kind": "tasks#task",
    //  "id": "MDM4MzQ4NTA3NDQwMDUxMzQ2OTQ6NzAwOTA4MDA1NzU2ODYwMzoyMDg3OTcyMDA1MTQ5NTA0",
    //  "etag": "\"84_7Cubo3y98GMV9bE3zQclHxhc/MTQyMDUzMzQ4MA\"",
    //  "title": "Get haircut",
    //  "updated": "2019-04-04T18:07:58.000Z",
    //  "selfLink": "https://www.googleapis.com/tasks/v1/lists/MDM4MzQ4NTA3NDQwMDUxMzQ2OTQ6NzAwOTA4MDA1NzU2ODYwMzow/tasks/MDM4MzQ4NTA3NDQwMDUxMzQ2OTQ6NzAwOTA4MDA1NzU2ODYwMzoyMDg3OTcyMDA1MTQ5NTA0",
    //  "position": "00000000001610612734",
    //  "notes": "Check in online first.",
    //  "status": "completed",
    //  "completed": "2019-04-04T18:38:56.000Z"
    // }
    // 
    // response status code: 200
  }
}