twitter4j: getting credential errors even though i had set them? - credentials

Question

package twitter4j.examples.tweets;
import twitter4j.Status;
import twitter4j.Twitter;
import twitter4j.TwitterFactory;
import twitter4j.auth.AccessToken;
import twitter4j.conf.*;
import java.io.IOException;
public final class UpdateStatus {
public static void main(String[] args) throws IOException {
String testPost = "hello from otc";
String consumerKey = "key";
String consumerSecret = "secret";
String accessToken = "access";
String accessSecret = "access_secret";
ConfigurationBuilder cb = new ConfigurationBuilder();
cb.setDebugEnabled(true)
.setOAuthConsumerKey(consumerKey)
.setOAuthConsumerSecret(consumerSecret)
.setOAuthAccessToken(accessToken)
.setOAuthAccessTokenSecret(accessSecret);
try {
TwitterFactory factory = new TwitterFactory();
Twitter twitter = factory.getInstance();
AccessToken accestoken = new AccessToken(accessToken, accessSecret);
twitter.setOAuthAccessToken(accestoken);
Status status = twitter.updateStatus(testPost);
System.out.println("it worked!");
if (status.getId() == 0) {
System.out
.println("Error occured while posting tweets to twitter");
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
why do i keep getting this error:
401:Authentication credentials (http://dev.twitter.com/pages/auth) were missing or incorrect. Ensure that you have set valid conumer key/secret, access token/secret, and the system clock in in sync.
error - Could not authenticate with OAuth.
request - /1/statuses/update.json
Relevant discussions can be on the Internet at:
http://www.google.co.jp/search?q=e06d87a8 or
http://www.google.co.jp/search?q=5851cbdb
TwitterException{exceptionCode=[e06d87a8-5851cbdb], statusCode=401, retryAfter=-1, rateLimitStatus=null, featureSpecificRateLimitStatus=null, version=2.2.3}
at twitter4j.internal.http.HttpClientImpl.request(HttpClientImpl.java:189)
at twitter4j.internal.http.HttpClientWrapper.request(HttpClientWrapper.java:65)
at twitter4j.internal.http.HttpClientWrapper.post(HttpClientWrapper.java:102)
at twitter4j.TwitterImpl.post(TwitterImpl.java:1871)
at twitter4j.TwitterImpl.updateStatus(TwitterImpl.java:459)
at twitter4j.examples.tweets.UpdateStatus.main(UpdateStatus.java:35)
i have set the credentials in the file already, have i not?

Answer 1

i figured it out heres a working code:
package twitter4j.examples.tweets;
import twitter4j.Status;
import twitter4j.Twitter;
import twitter4j.TwitterFactory;
import twitter4j.auth.AccessToken;
import java.io.IOException;
public final class UpdateStatus {
public static void main(String[] args) throws IOException {
String tweet = "your first tweet via java";
String accessToken = "your access token";
String accessSecret = "your access token secret";
try {
TwitterFactory factory = new TwitterFactory();
Twitter twitter = factory.getInstance();
AccessToken accestoken = new AccessToken(accessToken, accessSecret);
twitter.setOAuthAccessToken(accestoken);
Status status = twitter.updateStatus(tweet);
System.out.println("it worked!");
if (status.getId() == 0) {
System.out
.println("Error occured while posting tweets to twitter");
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
note: for this to work you MUST create an application on twitter
you must have a twitter4j.properties file which contain the following
debug set to true
oauth.consumerKey
oauth.consumerSecret
oauth.accessToken
oauth.accessTokenSecret
all the keys and tokens are from the twitter application
make sure your application access level all say "read and write"