From http://twitter4j.org/en/configuration.html

ConfigurationBuilder.properties

ConfigurationBuilder cb = new ConfigurationBuilder();
cb.setDebugEnabled(true)
  .setOAuthConsumerKey("*********************")
  .setOAuthConsumerSecret("******************************************")
  .setOAuthAccessToken("**************************************************")
  .setOAuthAccessTokenSecret("******************************************");
TwitterFactory tf = new TwitterFactory(cb.build());
Twitter twitter = tf.getInstance();