static String user = "guest";
static String database = "VsJogger";
static char[] password = {'g','u','e','s','t'};
public static void main(String[] args) {
    MongoCredential credential = MongoCredential.createCredential(user,
                                                                  database,
                                                                  password);

    MongoClientURI uri = new MongoClientURI("mongodb://"+user+":"
            +String.valueOf(password)
            +"@localhost/?authSource="+database);

   try{

     // To connect to mongodb server
     MongoClient mongoClient = new MongoClient( uri);


     // Now connect to your databases
     MongoDatabase db = mongoClient.getDatabase("VsJogger");
     System.out.println("Connect to database successfully");
     MongoCollection coll = db.getCollection("Jog");
     MongoCursor<Document> cursor = coll.find().iterator();

     int i = 1;
     while (cursor.hasNext()) {
        System.out.println("Inserted Document: "+i);
        System.out.println(cursor.next());
        i++;
     }


  }catch(Exception e){
     System.err.println( e.getClass().getName() + ": " + e.getMessage() );
  }

Oct 23, 2016 3:59:45 PM com.mongodb.diagnostics.logging.JULLogger log
INFO: Cluster created with settings {hosts=[localhost:27017], mode=SINGLE, requiredClusterType=UNKNOWN, serverSelectionTimeout='30000 ms', maxWaitQueueSize=500}
Connect to database successfully
Oct 23, 2016 3:59:45 PM com.mongodb.diagnostics.logging.JULLogger log
INFO: No server chosen by ReadPreferenceServerSelector{readPreference=primary} from cluster description ClusterDescription{type=UNKNOWN, connectionMode=SINGLE, serverDescriptions=[ServerDescription{address=localhost:27017, type=UNKNOWN, state=CONNECTING}]}. Waiting for 30000 ms before timing out
Oct 23, 2016 3:59:46 PM com.mongodb.diagnostics.logging.JULLogger log
INFO: Exception in monitor thread while connecting to server localhost:27017
com.mongodb.MongoSocketOpenException: Exception opening socket
    at com.mongodb.connection.SocketStream.open(SocketStream.java:63)
    at com.mongodb.connection.InternalStreamConnection.open(InternalStreamConnection.java:115)
    at com.mongodb.connection.DefaultServerMonitor$ServerMonitorRunnable.run(DefaultServerMonitor.java:113)
    at java.lang.Thread.run(Thread.java:745)
Caused by: java.net.ConnectException: Connection refused: connect
    at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method)
    at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:85)
    at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:345)
    at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
    at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
    at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    at java.net.Socket.connect(Socket.java:589)
    at com.mongodb.connection.SocketStreamHelper.initialize(SocketStreamHelper.java:57)
    at com.mongodb.connection.SocketStream.open(SocketStream.java:58)
    ... 3 more

com.mongodb.MongoTimeoutException: Timed out after 30000 ms while waiting for a server that matches ReadPreferenceServerSelector{readPreference=primary}. Client view of cluster state is {type=UNKNOWN, servers=[{address=localhost:27017, type=UNKNOWN, state=CONNECTING, exception={com.mongodb.MongoSocketOpenException: Exception opening socket}, caused by {java.net.ConnectException: Connection refused: connect}}]
BUILD SUCCESSFUL (total time: 31 seconds)