Question

When I search for a given hashtag, I get the results for recent tweets containing that hashtag. This is what I want to stream, So if any new tweets with this hashtag are made I will know.

Answer 1

Twitter twitter = new TwitterFactory().getInstance();
try {
    QueryResult result = twitter.search(new Query("#myhashtag"));
} catch (TwitterException te) {
    te.printStackTrace();
}

Source

You may need to escape the # symbol