social networking - Twitter authentication credentials -


i new social network analysis , twitter api.i wanted collect tweets on topic .so have written following code

package com;  import java.io.bufferedwriter; import java.io.file; import java.io.filewriter; import java.io.ioexception; import java.util.list;  import twitter4j.query; import twitter4j.queryresult; import twitter4j.status; import twitter4j.tweet; import twitter4j.twitter; import twitter4j.twitterexception; import twitter4j.twitterfactory;  public class twittersearchadvance {     public static void main(string[] vishal) throws twitterexception,             ioexception {         // list<tweet> data = new arraylist<tweet>();         stringbuffer stringbuffer = new stringbuffer();         twitter twitter = new twitterfactory().getinstance();          (int page = 0; page <= 4; page++) {             query query = new query("airtel");             // query.setrpp(100); // 100 results per page              queryresult qr = twitter.search(query);             list<status> qrtweets = qr.gettweets();             system.out.println("-------------------" + qrtweets.size());             // break out if there no more tweets              (status t : qrtweets) {                 system.out.println(t.getcreatedat() + ": " + t.gettext());                  stringbuffer.append(t);                 stringbuffer.append("\n");                 bufferedwriter bw = new bufferedwriter(new filewriter(new file(                         "/home/vishal/firstdocu.txt"), true));                 bw.write(stringbuffer.tostring());                 bw.newline();                 // bw.write(t.getcreatedat() + ": " + t.gettext());                 bw.close();              }         }     } }

but when run following program following error starts coming

exception in thread "main" java.lang.illegalstateexception: authentication credentials missing. see http://twitter4j.org/configuration.html detail.     @ twitter4j.twitterbaseimpl.ensureauthorizationenabled(twitterbaseimpl.java:200)     @ twitter4j.twitterimpl.get(twitterimpl.java:1833)     @ twitter4j.twitterimpl.search(twitterimpl.java:282)     @ com.twittersearchadvance.main(twittersearchadvance.java:28)

where need provide credentials in program

thanks

have @ options here http://twitter4j.org/en/configuration.html

there number of ways provide credentials program:

  1. properties file
  2. configurationbuilder class
  3. system properties
  4. environment variables

all details , instructions can found in link


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