String (String fullTweet) { String twitterHandleFieldName = "\"screen_name\":\""; int indexOfTwitterHandleField = fullTweet.indexOf(twitterHandleFieldName) + twitterHandleFieldName.length(); int indexOfEndOfTwitterHandle = fullTweet.indexOf("\"", indexOfTwitterHandleField); return fullTweet.substring(indexOfTwitterHandleField, indexOfEndOfTwitterHandle); }