Twitter query result returns only 15 tweets

I'm using the twitter api in java to query tweets containing certain hashtags.

Example:

Query query = new Query("%23superbowl since:2013-12-21");
QueryResult result;
result = twitter.search(query);
List<Status> tweets = result.getTweets();

Array size is only 15. How do I change the max number of tweets returned?

Copyright Notice：Content Author:「emily」，Reproduced under the CC 4.0 BY-SA copyright license with a link to the original source and this disclaimer.
Link to original article：https://stackoverflow.com/questions/20850712/twitter-query-result-returns-only-15-tweets