twitter4j - get tweets by ID

How can I get the tweets when I have the tweet ID and the user ID ? I have a file containing lines like :

userID  tweetID

I guess I should go by :

Query query = new Query("huh ?");
QueryResult result = twitter.search(query);
List<Status> tweets = result.getTweets();

but I have no clue how to spell the query

Thanks

Well it was no search call. The tweet apparently is called Status and the code to retrieve one by ID is :

    final Twitter twitter = new TwitterFactory().getInstance();
    twitter.setOAuthConsumer(CONSUMER_KEY, CONSUMER_KEY_SECRET);
    AccessToken accessToken = new AccessToken(TWITTER_TOKEN,
            TWITTER_TOKEN_SECRET);
    twitter.setOAuthAccessToken(accessToken);
    try {
        Status status = twitter.showStatus(Long.parseLong(tweetID));
        if (status == null) { // 
            // don't know if needed - T4J docs are very bad
        } else {
            System.out.println("@" + status.getUser().getScreenName()
                        + " - " + status.getText());
        }
    } catch (TwitterException e) {
        System.err.print("Failed to search tweets: " + e.getMessage());
        // e.printStackTrace();
        // DON'T KNOW IF THIS IS THROWN WHEN ID IS INVALID
    }