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Authenticate with a Service Account for Google Sheets API with Java

I started with the Google Quick Start guide for Java for connecting to Google Sheets via their API (https://developers.google.com/sheets/api/quickstart/java). I am following their quick start tutorial as it is without any changes. However, instead of creating an OAuth client ID and downloading that JSON credentials file, I created a Service Account (because that's what it's going to be). However, the downloaded service account JSON file does not work with Google's Quick Start code :
import com.google.api.client.auth.oauth2.Credential;
import com.google.api.client.extensions.java6.auth.oauth2.AuthorizationCodeInstalledApp;
import com.google.api.client.extensions.jetty.auth.oauth2.LocalServerReceiver;
import com.google.api.client.googleapis.auth.oauth2.GoogleAuthorizationCodeFlow;
import com.google.api.client.googleapis.auth.oauth2.GoogleClientSecrets;
import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
import com.google.api.client.http.javanet.NetHttpTransport;
import com.google.api.client.json.JsonFactory;
import com.google.api.client.json.gson.GsonFactory;
import com.google.api.client.util.store.FileDataStoreFactory;
import com.google.api.services.sheets.v4.Sheets;
import com.google.api.services.sheets.v4.SheetsScopes;
import com.google.api.services.sheets.v4.model.ValueRange;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.security.GeneralSecurityException;
import java.util.Collections;
import java.util.List;
public class SheetsQuickstart {
private static final String APPLICATION_NAME = "Google Sheets API Java Quickstart";
private static final JsonFactory JSON_FACTORY = GsonFactory.getDefaultInstance();
private static final String TOKENS_DIRECTORY_PATH = "tokens";
/**
* Global instance of the scopes required by this quickstart.
* If modifying these scopes, delete your previously saved tokens/ folder.
*/
private static final List<String> SCOPES = Collections.singletonList(SheetsScopes.SPREADSHEETS_READONLY);
private static final String CREDENTIALS_FILE_PATH = "/credentials.json";
/**
* Creates an authorized Credential object.
* #param HTTP_TRANSPORT The network HTTP Transport.
* #return An authorized Credential object.
* #throws IOException If the credentials.json file cannot be found.
*/
private static Credential getCredentials(final NetHttpTransport HTTP_TRANSPORT) throws IOException {
// Load client secrets.
InputStream in = SheetsQuickstart.class.getResourceAsStream(CREDENTIALS_FILE_PATH);
if (in == null) {
throw new FileNotFoundException("Resource not found: " + CREDENTIALS_FILE_PATH);
}
GoogleClientSecrets clientSecrets = GoogleClientSecrets.load(JSON_FACTORY, new InputStreamReader(in));
// Build flow and trigger user authorization request.
GoogleAuthorizationCodeFlow flow = new GoogleAuthorizationCodeFlow.Builder(
HTTP_TRANSPORT, JSON_FACTORY, clientSecrets, SCOPES)
.setDataStoreFactory(new FileDataStoreFactory(new java.io.File(TOKENS_DIRECTORY_PATH)))
.setAccessType("offline")
.build();
LocalServerReceiver receiver = new LocalServerReceiver.Builder().setPort(8888).build();
return new AuthorizationCodeInstalledApp(flow, receiver).authorize("user");
}
/**
* Prints the names and majors of students in a sample spreadsheet:
* https://docs.google.com/spreadsheets/d/1BxiMVs0XRA5nFMdKvBdBZjgmUUqptlbs74OgvE2upms/edit
*/
public static void main(String... args) throws IOException, GeneralSecurityException {
// Build a new authorized API client service.
final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
final String spreadsheetId = "1BxiMVs0XRA5nFMdKvBdBZjgmUUqptlbs74OgvE2upms";
final String range = "Class Data!A2:E";
Sheets service = new Sheets.Builder(HTTP_TRANSPORT, JSON_FACTORY, getCredentials(HTTP_TRANSPORT))
.setApplicationName(APPLICATION_NAME)
.build();
ValueRange response = service.spreadsheets().values()
.get(spreadsheetId, range)
.execute();
List<List<Object>> values = response.getValues();
if (values == null || values.isEmpty()) {
System.out.println("No data found.");
} else {
System.out.println("Name, Major");
for (List row : values) {
// Print columns A and E, which correspond to indices 0 and 4.
System.out.printf("%s, %s\n", row.get(0), row.get(4));
}
}
}
}
and it gives this exception:
Task :run FAILED
Exception in thread "main" java.lang.IllegalArgumentException
at com.google.common.base.Preconditions.checkArgument(Preconditions.java:131)
at com.google.api.client.util.Preconditions.checkArgument(Preconditions.java:35)
at com.google.api.client.googleapis.auth.oauth2.GoogleClientSecrets.getDetails(GoogleClientSecrets.java:80)
at com.google.api.client.googleapis.auth.oauth2.GoogleAuthorizationCodeFlow$Builder.(GoogleAuthorizationCodeFlow.java:211)
at SheetsQuickstart.getCredentials(SheetsQuickstart.java:50)
at SheetsQuickstart.main(SheetsQuickstart.java:68)
I have already given 'Edit' access to the service account email id given in the json file to my Google spreadsheet, but it still gives the same error (in fact I tried changing my file permissions to 'anyone with link' can edit, and have used the same google spreadsheet ID in the code). Some webpages suggested a deprecated GoogleCredential based solution. Is there a non-deprecated solution to the problem?

Exception in thread "main" java.lang.NoClassDefFoundError: org/mortbay/jetty/Handler

I am trying to run the tutorial google drive api test
package Tests;
import com.google.api.client.auth.oauth2.Credential;
import com.google.api.client.extensions.java6.auth.oauth2.AuthorizationCodeInstalledApp;
import com.google.api.client.extensions.jetty.auth.oauth2.LocalServerReceiver;
import com.google.api.client.googleapis.auth.oauth2.GoogleAuthorizationCodeFlow;
import com.google.api.client.googleapis.auth.oauth2.GoogleClientSecrets;
import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
import com.google.api.client.http.javanet.NetHttpTransport;
import com.google.api.client.json.JsonFactory;
import com.google.api.client.json.jackson2.JacksonFactory;
import com.google.api.client.util.store.FileDataStoreFactory;
import com.google.api.services.drive.Drive;
import com.google.api.services.drive.DriveScopes;
import com.google.api.services.drive.model.File;
import com.google.api.services.drive.model.FileList;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.security.GeneralSecurityException;
import java.util.Collections;
import java.util.List;
public class DriveQuickstart {
private static final String APPLICATION_NAME = "Google Drive API Java Quickstart";
private static final JsonFactory JSON_FACTORY = JacksonFactory.getDefaultInstance();
private static final String TOKENS_DIRECTORY_PATH = "tokens";
/**
* Global instance of the scopes required by this quickstart.
* If modifying these scopes, delete your previously saved tokens/ folder.
*/
private static final List<String> SCOPES = Collections.singletonList(DriveScopes.DRIVE_METADATA_READONLY);
private static final String CREDENTIALS_FILE_PATH = "credentials.json";
/**
* Creates an authorized Credential object.
* #param HTTP_TRANSPORT The network HTTP Transport.
* #return An authorized Credential object.
* #throws IOException If the credentials.json file cannot be found.
*/
private static Credential getCredentials(final NetHttpTransport HTTP_TRANSPORT) throws IOException {
// Load client secrets.
InputStream in = DriveQuickstart.class.getResourceAsStream(CREDENTIALS_FILE_PATH);
if (in == null) {
throw new FileNotFoundException("Resource not found: " + CREDENTIALS_FILE_PATH);
}
GoogleClientSecrets clientSecrets = GoogleClientSecrets.load(JSON_FACTORY, new InputStreamReader(in));
// Build flow and trigger user authorization request.
GoogleAuthorizationCodeFlow flow = new GoogleAuthorizationCodeFlow.Builder(
HTTP_TRANSPORT, JSON_FACTORY, clientSecrets, SCOPES)
.setDataStoreFactory(new FileDataStoreFactory(new java.io.File(TOKENS_DIRECTORY_PATH)))
.setAccessType("offline")
.build();
LocalServerReceiver receiver = new LocalServerReceiver.Builder().setPort(8888).build();
return new AuthorizationCodeInstalledApp(flow, receiver).authorize("user");
}
public static void main(String... args) throws IOException, GeneralSecurityException {
// Build a new authorized API client service.
final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
Drive service = new Drive.Builder(HTTP_TRANSPORT, JSON_FACTORY, getCredentials(HTTP_TRANSPORT))
.setApplicationName(APPLICATION_NAME)
.build();
// Print the names and IDs for up to 10 files.
FileList result = service.files().list()
.setPageSize(10)
.setFields("nextPageToken, files(id, name)")
.execute();
List<File> files = result.getFiles();
if (files == null || files.isEmpty()) {
System.out.println("No files found.");
} else {
System.out.println("Files:");
for (File file : files) {
System.out.printf("%s (%s)\n", file.getName(), file.getId());
}
}
}
}
I have almost all jars mentioned and I have downloaded the config.json file. However I get the following error
WARNING: unable to change permissions for owner: C:\Users\aswat\git\bionovaQAnew\tokens
Exception in thread "main" java.lang.NoClassDefFoundError: org/mortbay/jetty/Handler
at com.google.api.client.extensions.jetty.auth.oauth2.LocalServerReceiver$Builder.build(LocalServerReceiver.java:205)
at Tests.DriveQuickstart.getCredentials(DriveQuickstart.java:57)
at Tests.DriveQuickstart.main(DriveQuickstart.java:64)
Caused by: java.lang.ClassNotFoundException: org.mortbay.jetty.Handler
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:582)
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
... 3 more
I have tried out multiple answers mentioned in stackoverflow.com/questions/50687434/error-running-spark-main-class-exception-in-thread-thread-0-java-lang-noclas, but it doesnt help me. I have attached my buildpath dependencies as well. Please let me know what the issue is.
I use Ant and eclipse.

After many trials what worked for me was:
Added guava-11.0.2.jar
Removed google api client json 1 2 3 alpha.jar
Re downloaded the credential.json
Started a new project with just the required jars in resource file as shown attached

Google Drive API Java, Authentication works for first time only

I use following code to upload file to google drive, it is used for java based web application. Everything works fine except authentication.
The main problem with the code is that it just ask once for authentication and later on when I run the project, it never ask for authentication.
I want authentication for each and every request made by client.
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package myapp.util;
import com.google.api.client.auth.oauth2.Credential;
import com.google.api.client.extensions.java6.auth.oauth2.AuthorizationCodeInstalledApp;
import com.google.api.client.extensions.jetty.auth.oauth2.LocalServerReceiver;
import com.google.api.client.googleapis.auth.oauth2.GoogleAuthorizationCodeFlow;
import com.google.api.client.googleapis.auth.oauth2.GoogleClientSecrets;
import com.google.api.client.googleapis.auth.oauth2.GoogleCredential;
import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
import com.google.api.client.googleapis.media.MediaHttpUploader;
import com.google.api.client.googleapis.media.MediaHttpUploaderProgressListener;
import com.google.api.client.http.HttpTransport;
import com.google.api.client.http.InputStreamContent;
import com.google.api.client.json.jackson2.JacksonFactory;
import com.google.api.client.json.JsonFactory;
import com.google.api.client.util.store.FileDataStoreFactory;
import com.google.api.services.drive.DriveScopes;
import com.google.api.services.drive.model.*;
import com.google.api.services.drive.Drive;
import java.io.BufferedInputStream;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.URLDecoder;
import java.security.GeneralSecurityException;
import java.util.Arrays;
import java.util.List;
import javax.faces.context.FacesContext;
import javax.servlet.ServletContext;
public class GDrive {
/**
* Application name.
*/
private static final String APPLICATION_NAME
= "Drive API Java Quickstart";
/**
* Directory to store user credentials for this application.
*/
private static final java.io.File DATA_STORE_DIR = new java.io.File(System.getProperty("user.home"), ".credentials/drive-java-quickstart.json");
/**
* Global instance of the {#link FileDataStoreFactory}.
*/
private static FileDataStoreFactory DATA_STORE_FACTORY;
/**
* Global instance of the JSON factory.
*/
private static final JsonFactory JSON_FACTORY
= JacksonFactory.getDefaultInstance();
/**
* Global instance of the HTTP transport.
*/
private static HttpTransport HTTP_TRANSPORT;
/**
* Global instance of the scopes required by this quickstart.
*
* If modifying these scopes, delete your previously saved credentials at
* ~/.credentials/drive-java-quickstart
*/
private static final List<String> SCOPES
= Arrays.asList(DriveScopes.DRIVE_FILE);
static {
try {
HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
DATA_STORE_FACTORY = new FileDataStoreFactory(DATA_STORE_DIR);
} catch (Throwable t) {
t.printStackTrace();
System.exit(1);
}
}
/**
* Creates an authorized Credential object.
*
* #return an authorized Credential object.
* #throws IOException
*/
public static Credential authorize() throws IOException {
ServletContext servletContext = (ServletContext) FacesContext.getCurrentInstance().getExternalContext().getContext();
String basePath = servletContext.getRealPath("");
basePath = URLDecoder.decode(basePath, "UTF-8");
// Load client secrets.
InputStream in = new FileInputStream(
new java.io.File(basePath + "/resources/client_secret.json"));
GoogleClientSecrets clientSecrets
= GoogleClientSecrets.load(JSON_FACTORY, new InputStreamReader(in));
// Build flow and trigger user authorization request.
GoogleAuthorizationCodeFlow flow
= new GoogleAuthorizationCodeFlow.Builder(
HTTP_TRANSPORT, JSON_FACTORY, clientSecrets, SCOPES)
.setDataStoreFactory(DATA_STORE_FACTORY)
.setAccessType("offline")
.setApprovalPrompt("auto")
.build();
GoogleCredential credential = new GoogleCredential();
System.out.println(
"Credentials saved to " + DATA_STORE_DIR.getAbsolutePath());
return credential;
}
/**
* Build and return an authorized Drive client service.
*
* #return an authorized Drive client service
* #throws IOException
*/
public static Drive getDriveService() throws IOException {
Credential credential = authorize();
System.out.println("getAccessToken" + credential.getAccessToken());
System.out.println("setAccessToken" + credential.getAccessToken());
System.out.println("setExpiresInSeconds" + credential.getExpiresInSeconds());
System.out.println("setRefreshToken" + credential.getRefreshToken());
return new Drive.Builder(
HTTP_TRANSPORT, JSON_FACTORY, credential)
.setApplicationName(APPLICATION_NAME)
.build();
}
public boolean uploadToDrive(String filePathUrl, String fileName) throws FileNotFoundException, IOException, GeneralSecurityException, Exception {
Drive service = GDrive.getDriveService();
boolean status = false;
// TODO code application logic here
java.io.File mediaFile = new java.io.File(filePathUrl);
com.google.api.services.drive.model.File fileMetadata = new com.google.api.services.drive.model.File();
fileMetadata.setName(fileName);
InputStreamContent mediaContent = new InputStreamContent("application/octet-stream", new BufferedInputStream(new FileInputStream(mediaFile)));
mediaContent.setLength(mediaFile.length());
HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
Drive.Files.Create request = service.files().create(fileMetadata, mediaContent);
request.getMediaHttpUploader().setProgressListener(new CustomProgressListener());
request.execute();
status = true;
return status;
}
}
class CustomProgressListener implements MediaHttpUploaderProgressListener {
public void progressChanged(MediaHttpUploader uploader) throws IOException {
switch (uploader.getUploadState()) {
case INITIATION_STARTED:
System.out.println("Initiation has started!");
break;
case INITIATION_COMPLETE:
System.out.println("Initiation is complete!");
break;
case MEDIA_IN_PROGRESS:
System.out.println(uploader.getProgress());
break;
case MEDIA_COMPLETE:
System.out.println("Upload is complete!");
}
}
}

By design the client library stores authorization information, so that the user isn't prompted every time they run your application. The client library persists authorization information to the DataStore instance you provide, in your case a FileDataStore which stores files in a particular directory.
Multiple users can share the same data store, but you need to pass a unique user identifier when performing authorization. For installed applications this is done in AuthorizationCodeInstalledApp.authorize, and for web applications it's done by overriding AbstractAuthorizationCodeServlet.getUserId and AbstractAuthorizationCodeCallbackServlet.getUserId. See the Java client library's OAuth2 guide for more information and examples.

Error while executing Google Prediction API Command line Sample

I have downloaded the sample command line program for prediction api and imported in eclipse as mention here .
I have imported that sample program and replaced the content of client_secrets.json with values of file which i downloaded from api console as mentioned in the above link .
I have built the model using standalone explorer .
But prediction i want to do through my java code . So below I have mentioned the code .
package com.google.api.services.samples.prediction.cmdline;
import com.google.api.client.auth.oauth2.Credential;
import com.google.api.client.extensions.java6.auth.oauth2.AuthorizationCodeInstalledApp;
import com.google.api.client.extensions.jetty.auth.oauth2.LocalServerReceiver;
import com.google.api.client.googleapis.auth.oauth2.GoogleAuthorizationCodeFlow;
import com.google.api.client.googleapis.auth.oauth2.GoogleClientSecrets;
import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
import com.google.api.client.http.HttpResponse;
import com.google.api.client.http.HttpResponseException;
import com.google.api.client.http.HttpTransport;
import com.google.api.client.json.JsonFactory;
import com.google.api.client.json.jackson2.JacksonFactory;
import com.google.api.client.util.store.DataStoreFactory;
import com.google.api.client.util.store.FileDataStoreFactory;
import com.google.api.services.prediction.Prediction;
import com.google.api.services.prediction.PredictionScopes;
import com.google.api.services.prediction.model.Input;
import com.google.api.services.prediction.model.Input.InputInput;
import com.google.api.services.prediction.model.Output;
import com.google.api.services.prediction.model.Training;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Collections;
/**
* #author Yaniv Inbar
*/
public class PredictionSample {
/**
* Be sure to specify the name of your application. If the application name is {#code null} or
* blank, the application will log a warning. Suggested format is "MyCompany-ProductName/1.0".
*/
private static final String APPLICATION_NAME = "senti-model/1.0";
static final String MODEL_ID = "senti-model";
//static final String STORAGE_DATA_LOCATION = "enter_bucket/language_id.txt";
/** Directory to store user credentials. */
private static final java.io.File DATA_STORE_DIR =
new java.io.File(System.getProperty("user.home"), ".store/prediction_sample");
/**
* Global instance of the {#link DataStoreFactory}. The best practice is to make it a single
* globally shared instance across your application.
*/
private static FileDataStoreFactory dataStoreFactory;
/** Global instance of the HTTP transport. */
private static HttpTransport httpTransport;
/** Global instance of the JSON factory. */
private static final JsonFactory JSON_FACTORY = JacksonFactory.getDefaultInstance();
/** Authorizes the installed application to access user's protected data. */
private static Credential authorize() throws Exception {
// load client secrets
GoogleClientSecrets clientSecrets = GoogleClientSecrets.load(JSON_FACTORY,
new InputStreamReader(PredictionSample.class.getResourceAsStream("/client_secrets.json")));
if (clientSecrets.getDetails().getClientId().startsWith("Enter")
|| clientSecrets.getDetails().getClientSecret().startsWith("Enter ")) {
System.out.println(
"Enter Client ID and Secret from https://code.google.com/apis/console/?api=prediction "
+ "into prediction-cmdline-sample/src/main/resources/client_secrets.json");
System.exit(1);
}
// set up authorization code flow
GoogleAuthorizationCodeFlow flow = new GoogleAuthorizationCodeFlow.Builder(
httpTransport, JSON_FACTORY, clientSecrets,
Collections.singleton(PredictionScopes.PREDICTION)).setDataStoreFactory(
dataStoreFactory).build();
// authorize
return new AuthorizationCodeInstalledApp(flow, new LocalServerReceiver()).authorize("user");
}
private static void run() throws Exception {
httpTransport = GoogleNetHttpTransport.newTrustedTransport();
dataStoreFactory = new FileDataStoreFactory(DATA_STORE_DIR);
// authorization
Credential credential = authorize();
Prediction prediction = new Prediction.Builder(
httpTransport, JSON_FACTORY, credential).setApplicationName(APPLICATION_NAME).build();
//train(prediction);
predict(prediction, "Is this sentence in English?");
predict(prediction, "¿Es esta frase en Español?");
predict(prediction, "Est-ce cette phrase en Français?");
}
private static void error(String errorMessage) {
System.err.println();
System.err.println(errorMessage);
System.exit(1);
}
private static void predict(Prediction prediction, String text) throws IOException {
Input input = new Input();
InputInput inputInput = new InputInput();
inputInput.setCsvInstance(Collections.<Object>singletonList(text));
input.setInput(inputInput);
Output output = prediction.trainedmodels().predict(MODEL_ID, input).execute();
System.out.println("Text: " + text);
System.out.println("Predicted language: " + output.getOutputLabel());
}
public static void main(String[] args) {
try {
run();
// success!
return;
} catch (IOException e) {
System.err.println(e.getMessage());
} catch (Throwable t) {
t.printStackTrace();
}
System.exit(1);
}
}
This is the error I am getting while executing this code:
Jun 24, 2014 2:11:09 PM com.google.api.client.util.store.FileDataStoreFactory setPermissionsToOwnerOnly
WARNING: unable to change permissions for everybody: C:\Users\deepesh.shetty\.store\prediction_sample
Jun 24, 2014 2:11:09 PM com.google.api.client.util.store.FileDataStoreFactory setPermissionsToOwnerOnly
WARNING: unable to change permissions for owner: C:\Users\deepesh.shetty\.store\prediction_sample
java.lang.NullPointerException
at com.google.api.client.repackaged.com.google.common.base.Preconditions.checkNotNull(Preconditions.java:191)
at com.google.api.client.util.Preconditions.checkNotNull(Preconditions.java:127)
at com.google.api.client.json.jackson2.JacksonFactory.createJsonParser(JacksonFactory.java:96)
at com.google.api.client.json.JsonObjectParser.parseAndClose(JsonObjectParser.java:85)
at com.google.api.client.json.JsonObjectParser.parseAndClose(JsonObjectParser.java:81)
at com.google.api.client.auth.oauth2.TokenResponseException.from(TokenResponseException.java:88)
at com.google.api.client.auth.oauth2.TokenRequest.executeUnparsed(TokenRequest.java:287)
at com.google.api.client.auth.oauth2.TokenRequest.execute(TokenRequest.java:307)
at com.google.api.client.auth.oauth2.Credential.executeRefreshToken(Credential.java:570)
at com.google.api.client.auth.oauth2.Credential.refreshToken(Credential.java:489)
at com.google.api.client.auth.oauth2.Credential.intercept(Credential.java:217)
at com.google.api.client.http.HttpRequest.execute(HttpRequest.java:859)
at com.google.api.client.googleapis.services.AbstractGoogleClientRequest.executeUnparsed(AbstractGoogleClientRequest.java:410)
at com.google.api.client.googleapis.services.AbstractGoogleClientRequest.executeUnparsed(AbstractGoogleClientRequest.java:343)
at com.google.api.client.googleapis.services.AbstractGoogleClientRequest.execute(AbstractGoogleClientRequest.java:460)
at com.google.api.services.samples.prediction.cmdline.PredictionSample.predict(PredictionSample.java:157)
at com.google.api.services.samples.prediction.cmdline.PredictionSample.run(PredictionSample.java:100)
at com.google.api.services.samples.prediction.cmdline.PredictionSample.main(PredictionSample.java:164)
Help me in issue .
Thank you .

.../jre/lib/security/java.policy
Can you try giving permission to all as below ?
grant{
permission java.security.AllPermission;
};

If you are using client_secrets.json, this creates a tiny file in your user folder - in my case it is C:\Users\myUser\.store\calendar_sample, the file is StoredCredential, so you can delete this file and try again the sample, this will work, when you run again your program it will ask you to grant permission again for your google account.

Exception when authenticating to Google Drive using Java API

I'm having some problems while uploading a .txt file with Google Drive API. Here's my code:
import com.google.api.client.googleapis.auth.oauth2.GoogleAuthorizationCodeFlow;
import com.google.api.client.googleapis.auth.oauth2.GoogleCredential;
import com.google.api.client.googleapis.auth.oauth2.GoogleTokenResponse;
import com.google.api.client.http.FileContent;
import com.google.api.client.http.HttpTransport;
import com.google.api.client.http.javanet.NetHttpTransport;
import com.google.api.client.json.JsonFactory;
import com.google.api.client.json.jackson.JacksonFactory;
import com.google.api.services.drive.Drive;
import com.google.api.services.drive.DriveScopes;
import com.google.api.services.drive.model.File;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Arrays;
public class DriveCommandLine {
private static String CLIENT_ID = "client_id";
private static String CLIENT_SECRET = "client_secret";
private static String REDIRECT_URI = "urn:ietf:wg:oauth:2.0:oob";
public static void main(String[] args) throws IOException {
HttpTransport httpTransport = new NetHttpTransport();
JsonFactory jsonFactory = new JacksonFactory();
GoogleAuthorizationCodeFlow flow = new GoogleAuthorizationCodeFlow.Builder(
httpTransport, jsonFactory, CLIENT_ID, CLIENT_SECRET, Arrays.asList(DriveScopes.DRIVE))
.setAccessType("online")
.setApprovalPrompt("auto").build();
String url = flow.newAuthorizationUrl().setRedirectUri(REDIRECT_URI).build();
System.out.println("Please open the following URL in your browser then type the authorization code:");
System.out.println(" " + url);
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
String code = br.readLine();
GoogleTokenResponse response = flow.newTokenRequest(code).setRedirectUri(REDIRECT_URI).execute();
GoogleCredential credential = new GoogleCredential().setFromTokenResponse(response);
//Create a new authorized API client
Drive service = new Drive.Builder(httpTransport, jsonFactory, credential).build();
//Insert a file
File body = new File();
body.setTitle("Document Example");
body.setDescription("This is a test of Google Drive SDK");
body.setMimeType("text/plain");
java.io.File fileContent = new java.io.File("document.txt");
FileContent mediaContent = new FileContent("text/plain", fileContent);
File file = service.files().insert(body, mediaContent).execute();
System.out.println("File ID: " + file.getId());
}
}
The problem it's in this line:
GoogleTokenResponse response = flow.newTokenRequest(code).setRedirectUri(REDIRECT_URI).execute();
And the errors are:
Exception in thread "main" javax.net.ssl.SSLException: java.lang.RuntimeException: Unexpected error: java.security.InvalidAlgorithmParameterException: the trustAnchors parameter must be non-empty
at sun.security.ssl.Alerts.getSSLException(Alerts.java:208)
at sun.security.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1836)
at sun.security.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1794)
at sun.security.ssl.SSLSocketImpl.handleException(SSLSocketImpl.java:1777)
at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1296)
at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1273)
at sun.net.www.protocol.https.HttpsClient.afterConnect(HttpsClient.java:523)
at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:185)
at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1087)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.getOutputStream(HttpsURLConnectionImpl.java:250)
at com.google.api.client.http.javanet.NetHttpRequest.execute(NetHttpRequest.java:79)
at com.google.api.client.http.HttpRequest.execute(HttpRequest.java:895)
at com.google.api.client.auth.oauth2.TokenRequest.executeUnparsed(TokenRequest.java:299)
at com.google.api.client.googleapis.auth.oauth2.GoogleAuthorizationCodeTokenRequest.execute(GoogleAuthorizationCodeTokenRequest.java:147)
**at DriveCommandLine.main(DriveCommandLine.java:43)**
Caused by: java.lang.RuntimeException: Unexpected error: java.security.InvalidAlgorithmParameterException: the trustAnchors parameter must be non-empty
at sun.security.validator.PKIXValidator.<init>(PKIXValidator.java:90)
at sun.security.validator.Validator.getInstance(Validator.java:179)
at sun.security.ssl.X509TrustManagerImpl.getValidator(X509TrustManagerImpl.java:314)
at sun.security.ssl.X509TrustManagerImpl.checkTrustedInit(X509TrustManagerImpl.java:173)
at sun.security.ssl.X509TrustManagerImpl.checkTrusted(X509TrustManagerImpl.java:186)
at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:126)
at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1319)
at sun.security.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:154)
at sun.security.ssl.Handshaker.processLoop(Handshaker.java:868)
at sun.security.ssl.Handshaker.process_record(Handshaker.java:804)
at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:966)
at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1262)
at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1289)
... 10 more
Caused by: java.security.InvalidAlgorithmParameterException: the trustAnchors parameter must be non-empty
at java.security.cert.PKIXParameters.setTrustAnchors(PKIXParameters.java:200)
at java.security.cert.PKIXParameters.<init>(PKIXParameters.java:120)
at java.security.cert.PKIXBuilderParameters.<init>(PKIXBuilderParameters.java:104)
at sun.security.validator.PKIXValidator.<init>(PKIXValidator.java:88)
... 22 more

You cannot use this sample (that is for Google Application based on localhost (client-side)) with methods provided for WebApplication. You need to instantiate a Google Web Application (server-side using HttpServlet) and use the redirect URI for a doGet method to catch automatically the code and exchange data to get the correct Authorization. See OAuth 2.0 and OAuth 2.0 for WebApplication