/*
 * Copyright 2007 Yusuke Yamamoto
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package twitter4j.examples.timeline;

import twitter4j.Status;
import twitter4j.Twitter;
import twitter4j.TwitterException;
import twitter4j.TwitterFactory;

import java.util.List;

/**
 * @author Yusuke Yamamoto - yusuke at mac.com
 * @since Twitter4J 2.1.7
 */
public class GetUserTimeline {
    /**
     * Usage: java twitter4j.examples.timeline.GetUserTimeline
     *
     * @param args String[]
     */
    public static void main(String[] args) {
        // gets Twitter instance with default credentials
        Twitter twitter = new TwitterFactory().getInstance();
        try {
            List<Status> statuses;
            String user;
            if (args.length == 1) {
                user = args[0];
                statuses = twitter.getUserTimeline(user);
            } else {
                user = twitter.verifyCredentials().getScreenName();
                statuses = twitter.getUserTimeline();
            }
            System.out.println("Showing @" + user + "'s user timeline.");
            for (Status status : statuses) {
                System.out.println("@" + status.getUser().getScreenName() + " - " + status.getText());
            }
        } catch (TwitterException te) {
            te.printStackTrace();
            System.out.println("Failed to get timeline: " + te.getMessage());
            System.exit(-1);
        }
    }
}

/*
 * Copyright 2007 Yusuke Yamamoto
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package twitter4j.examples.timeline;

import twitter4j.Status;
import twitter4j.Twitter;
import twitter4j.TwitterException;
import twitter4j.TwitterFactory;

import java.util.List;

/**
 * @author Yusuke Yamamoto - yusuke at mac.com
 * @since Twitter4J 2.1.7
 */
public class GetUserTimeline {
    /**
     * Usage: java twitter4j.examples.timeline.GetUserTimeline
     *
     * @param args String[]
     */
    public static void main(String[] args) {
        // gets Twitter instance with default credentials
        Twitter twitter = new TwitterFactory().getInstance();
        try {
            List<Status> statuses;
            String user;
            if (args.length == 1) {
                user = args[0];
                statuses = twitter.getUserTimeline(user);
            } else {
                user = twitter.verifyCredentials().getScreenName();
                statuses = twitter.getUserTimeline();
            }
            System.out.println("Showing @" + user + "'s user timeline.");
            for (Status status : statuses) {
                System.out.println("@" + status.getUser().getScreenName() + " - " + status.getText());
            }
        } catch (TwitterException te) {
            te.printStackTrace();
            System.out.println("Failed to get timeline: " + te.getMessage());
            //Please remove this line (System.exit(-1)) which should not be used at all because if an exception occurs
            // and this statement gets executed, your complete application including the JVM will shutdown.
            // I have faced this situation, that is why informing about this 
            //System.exit(-1);
        }
    }
}

Remove System.exit(-1)