Update my fork

.gitignore

@@ -1,3 +1,5 @@
+*/bin/*
+
 *.class
 
 # Package Files #

.travis.yml

@@ -1,11 +1,13 @@
 language: java
 
-install: travis_wait 40 mvn -q clean install -Dgib.enabled=true
+install: travis_wait 60 mvn -q test
+
+before_script:
+  - echo "MAVEN_OPTS='-Xmx2048M -Xss128M -XX:MaxPermSize=2048M -XX:+CMSClassUnloadingEnabled -XX:+UseConcMarkSweepGC -XX:+TieredCompilation -XX:TieredStopAtLevel=1 -XX:-UseGCOverheadLimit'" > ~/.mavenrc
 
 jdk:
   - oraclejdk8
 
-sudo: false
 addons:
   apt:
     packages:
@@ -14,4 +16,6 @@ addons:
 cache:
   directories:
   - .autoconf
-  - $HOME/.m2
+  - $HOME/.m2
+
+

Twitter4J/README.md

@@ -0,0 +1,3 @@
+### Relevant articles
+
+- [Introduction to Twitter4J](http://www.baeldung.com/twitter4j)

Twitter4J/pom.xml

@@ -0,0 +1,53 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <groupId>com.mabsisa</groupId>
+  <artifactId>Twitter4J</artifactId>
+  <packaging>jar</packaging>
+  <version>1.0-SNAPSHOT</version>
+  <name>Twitter4J</name>
+  <url>http://maven.apache.org</url>
+
+	<properties>
+	    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+	    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
+	    <java.version>1.8</java.version>
+	    <maven.compiler.source>1.8</maven.compiler.source>
+		<maven.compiler.target>1.8</maven.compiler.target>
+	</properties>
+
+    <dependencies>
+		<dependency>
+    		<groupId>org.twitter4j</groupId>
+    		<artifactId>twitter4j-stream</artifactId>
+    		<version>4.0.6</version>
+		</dependency>
+		<dependency>
+		    <groupId>junit</groupId>
+		    <artifactId>junit</artifactId>
+		    <version>4.12</version>
+		</dependency>
+    </dependencies>
+
+    <build>
+	    <finalName>${project.artifactId}</finalName>
+	    <resources>
+      		<resource>
+			<directory>src/main/resources</directory>
+      		</resource>
+	    </resources>
+	    <plugins>
+      		<plugin>
+        		<groupId>org.apache.maven.plugins</groupId>
+        		<artifactId>maven-surefire-plugin</artifactId>
+        		<version>2.19.1</version>
+        		<configuration>
+          			<excludes>
+            			<exclude>**/ApplicationTest.java</exclude>
+          			</excludes>
+        		</configuration>
+      		</plugin>
+    	</plugins>
+	</build>
+
+</project>

Twitter4J/src/main/java/com/baeldung/Application.java

@@ -0,0 +1,116 @@
+/**
+ * 
+ */
+package com.baeldung;
+
+import java.util.List;
+import java.util.stream.Collectors;
+
+import twitter4j.DirectMessage;
+import twitter4j.Query;
+import twitter4j.QueryResult;
+import twitter4j.StallWarning;
+import twitter4j.Status;
+import twitter4j.StatusDeletionNotice;
+import twitter4j.StatusListener;
+import twitter4j.Twitter;
+import twitter4j.TwitterException;
+import twitter4j.TwitterFactory;
+import twitter4j.TwitterStream;
+import twitter4j.TwitterStreamFactory;
+import twitter4j.conf.ConfigurationBuilder;
+
+public class Application {
+
+	public static Twitter getTwitterinstance() {
+		/**
+		 * if not using properties file, we can set access token by following way
+		 */
+//		ConfigurationBuilder cb = new ConfigurationBuilder();
+//		cb.setDebugEnabled(true)
+//		  .setOAuthConsumerKey("//TODO")
+//		  .setOAuthConsumerSecret("//TODO")
+//		  .setOAuthAccessToken("//TODO")
+//		  .setOAuthAccessTokenSecret("//TODO");
+//		TwitterFactory tf = new TwitterFactory(cb.build());
+//		Twitter twitter = tf.getSingleton();
+
+		Twitter twitter = TwitterFactory.getSingleton();
+		return twitter;
+
+	}
+
+	public static String createTweet(String tweet) throws TwitterException {
+		Twitter twitter = getTwitterinstance();
+		Status status = twitter.updateStatus("creating baeldung API");
+	        return status.getText();
+	}
+
+	public static List<String> getTimeLine() throws TwitterException {
+		Twitter twitter = getTwitterinstance();
+		List<Status> statuses = twitter.getHomeTimeline();
+		return statuses.stream().map(
+				item -> item.getText()).collect(
+						Collectors.toList());
+	}
+
+	public static String sendDirectMessage(String recipientName, String msg) throws TwitterException {
+		Twitter twitter = getTwitterinstance();
+	        DirectMessage message = twitter.sendDirectMessage(recipientName, msg);
+	        return message.getText();
+	}
+
+	public static List<String> searchtweets() throws TwitterException {
+		Twitter twitter = getTwitterinstance();
+	        Query query = new Query("source:twitter4j baeldung");
+	        QueryResult result = twitter.search(query);
+	        List<Status> statuses = result.getTweets();
+	        return statuses.stream().map(
+				item -> item.getText()).collect(
+						Collectors.toList());
+	}
+
+	public static void streamFeed() {
+
+		StatusListener listener = new StatusListener(){
+
+			@Override
+			public void onException(Exception e) {
+				e.printStackTrace();
+			}
+
+			@Override
+			public void onDeletionNotice(StatusDeletionNotice arg) {
+                                System.out.println("Got a status deletion notice id:" + arg.getStatusId());
+			}
+
+			@Override
+			public void onScrubGeo(long userId, long upToStatusId) {
+                                System.out.println("Got scrub_geo event userId:" + userId + " upToStatusId:" + upToStatusId);
+			}
+
+			@Override
+			public void onStallWarning(StallWarning warning) {
+                                System.out.println("Got stall warning:" + warning);
+			}
+
+			@Override
+			public void onStatus(Status status) {
+                                System.out.println(status.getUser().getName() + " : " + status.getText());
+			}
+
+			@Override
+			public void onTrackLimitationNotice(int numberOfLimitedStatuses) {
+                                System.out.println("Got track limitation notice:" + numberOfLimitedStatuses);
+			}
+		};
+
+		TwitterStream twitterStream = new TwitterStreamFactory().getInstance();
+
+	        twitterStream.addListener(listener);
+
+	        twitterStream.sample();
+
+	}
+
+}

Twitter4J/src/main/resources/twitter4j.properties

@@ -0,0 +1,4 @@
+oauth.consumerKey=//TODO
+oauth.consumerSecret=//TODO
+oauth.accessToken=//TODO
+oauth.accessTokenSecret=//TODO

Twitter4J/src/test/java/com/baeldung/ApplicationTest.java

@@ -0,0 +1,40 @@
+package com.baeldung;
+
+import static org.junit.Assert.assertEquals;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.junit.Test;
+
+import twitter4j.TwitterException;
+
+public class ApplicationTest {
+
+	/**
+	 * In order run this jUnit test you need to configure your API details in the twitter4j.properties
+	 */
+
+	String tweet = "baeldung is awsome";
+
+	@Test
+	public void givenText_updateStatus() throws TwitterException {
+		String text = Application.createTweet(tweet);
+		assertEquals(tweet, text);
+	}
+
+	@Test
+	public void givenCredential_fetchStatus() throws TwitterException {
+		List<String> statuses = Application.getTimeLine();
+		List<String> expectedStatuses = new ArrayList<String>();
+		expectedStatuses.add(tweet);
+		assertEquals(expectedStatuses, statuses);
+	}
+
+	@Test
+	public void givenRecipientNameAndMessage_sendDirectMessage() throws TwitterException {
+		String msg = Application.sendDirectMessage("YOUR_RECCIPIENT_ID", tweet);
+		assertEquals(msg, tweet);
+	}
+
+}

algorithms/.gitignore

@@ -0,0 +1 @@
+/target/

algorithms/README.md

@@ -2,3 +2,7 @@
 
 - [Dijkstra Algorithm in Java](http://www.baeldung.com/java-dijkstra)
 - [Introduction to Cobertura](http://www.baeldung.com/cobertura)
+- [Ant Colony Optimization](http://www.baeldung.com/java-ant-colony-optimization)
+- [Validating Input With Finite Automata in Java](http://www.baeldung.com/finite-automata-java)
+- [Introduction to Jenetics Library](http://www.baeldung.com/jenetics)
+- [Check If a Number Is Prime in Java](http://www.baeldung.com/java-prime-numbers)

algorithms/pom.xml

@@ -9,15 +9,33 @@
 		<junit.version>4.12</junit.version>
 		<maven-compiler-plugin.version>3.6.0</maven-compiler-plugin.version>
 		<exec-maven-plugin.version>1.5.0</exec-maven-plugin.version>
+		<lombok.version>1.16.12</lombok.version>
+		<commons-math3.version>3.6.1</commons-math3.version>
 	</properties>
 
 	<dependencies>
+		<dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-math3</artifactId>
+            <version>${commons-math3.version}</version>
+        </dependency>
 		<dependency>
 			<groupId>junit</groupId>
 			<artifactId>junit</artifactId>
 			<version>${junit.version}</version>
 			<scope>test</scope>
 		</dependency>
+		<dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <version>${lombok.version}</version>
+            <scope>provided</scope>
+        </dependency>
+        <dependency>
+   	 		<groupId>io.jenetics</groupId>
+    		<artifactId>jenetics</artifactId>
+    		<version>3.7.0</version>
+		</dependency>
 	</dependencies>
 
 	<build>

core-java/src/main/java/com/baeldung/algorithms/RunAlgorithm.java → algorithms/src/main/java/com/baeldung/algorithms/RunAlgorithm.java

@@ -9,13 +9,14 @@
 
 public class RunAlgorithm {
 
-	public static void main(String[] args) {
+	public static void main(String[] args) throws InstantiationException, IllegalAccessException {
 		Scanner in = new Scanner(System.in);
 		System.out.println("Run algorithm:");
 		System.out.println("1 - Simulated Annealing");
 		System.out.println("2 - Slope One");
 		System.out.println("3 - Simple Genetic Algorithm");
 		System.out.println("4 - Ant Colony");
+		System.out.println("5 - Dijkstra");
 		int decision = in.nextInt();
 		switch (decision) {
 		case 1:
@@ -33,6 +34,9 @@ public static void main(String[] args) {
 			AntColonyOptimization antColony = new AntColonyOptimization(21);
 			antColony.startAntOptimization();
 			break;
+		case 5:
+			System.out.println("Please run the DijkstraAlgorithmTest.");
+			break;
 		default:
 			System.out.println("Unknown option");
 			break;