java.sql.SQLException: Network error IOException: Connection timed out: connect - sql-server-2012-express

Question

I have installed SQL Server 2012 Express in my laptop and tried to run a sample java program as follows:
import java.sql.*;
public class Ex2 {
Connection con;
Statement st;
ResultSet rs;
public Ex2(String query){
System.out.println("IN Const1");
try{
System.out.println("IN try");
Class.forName("net.sourceforge.jtds.jdbc.Driver");
String dbName = "HOME";
String user = "sa";
String password = "JUL#2012";
//the name of my SQL SERVER 2005 instance
String SqlServerInstance = "SQLEXPRESS";
String url = "jdbc:jtds:sqlserver://localhost:1433";
url = url + "/" + dbName;
url = url + ";" + SqlServerInstance;
con = DriverManager.getConnection(url, user, password);
System.out.println("nach DriverManager");
st = con.createStatement();
st.executeQuery(query);
rs = st.getResultSet();
while ( rs.next() ){
System.out.println(rs.getString(0));
System.out.println(rs.getString(1));
System.out.println(rs.getString(2));
System.out.println(rs.getString(3));
}
}
catch(Exception e){
e.printStackTrace();
System.out.println("Exception: " + e.getMessage());
}
}
public static void main(String[] argv){
System.out.println("IN MAIN");
Ex2 test = new Ex2("SELECT * FROM HOME.dbo.employee;");
}
}*
and getting the following error log in the console:
java.sql.SQLException: Network error IOException: Connection timed out: connect
at net.sourceforge.jtds.jdbc.ConnectionJDBC2.<init>(ConnectionJDBC2.java:410)
at net.sourceforge.jtds.jdbc.ConnectionJDBC3.<init>(ConnectionJDBC3.java:50)
at net.sourceforge.jtds.jdbc.Driver.connect(Driver.java:184)
at java.sql.DriverManager.getConnection(DriverManager.java:525)
at java.sql.DriverManager.getConnection(DriverManager.java:171)
at Ex2.<init>(Ex2.java:22)
at Ex2.main(Ex2.java:43)
Caused by: java.net.ConnectException: Connection timed out: connect
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333)
at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:195)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:182)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
at java.net.Socket.connect(Socket.java:516)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at net.sourceforge.jtds.jdbc.SharedSocket.createSocketForJDBC3(SharedSocket.java:307)
at net.sourceforge.jtds.jdbc.SharedSocket.<init>(SharedSocket.java:257)
at net.sourceforge.jtds.jdbc.ConnectionJDBC2.<init>(ConnectionJDBC2.java:311)
Exception: Network error IOException: Connection timed out: connect
... 6 more
When I checked the sql server configuration manager the services SQL Server and SQL Server Browser are running.
I have been googling for the last two days and struggle to fix this issue and couldn't. So please help me.