Problem with socket programming-connecting to port 13

Question

Hi, I am learning JAVA, and we are on the subject of sockets. I am trying to make this program to connect to port 13, get the time, and print it to the console. This is my code:
import java.io.*;
import java.net.*;
public class temp {
     public static final int PORT = 13;
     public static void main(String[] args) {
          Socket s = null;
          String line = null;
          try {
               s = new Socket("localhost", PORT);
               DataInputStream sin = new DataInputStream(s.getInputStream());
               line = sin.readLine();
               if (line != null) System.out.println(line);
          catch (IOException e) {System.err.println("!" + e);}
          finally {
               try { if (s != null) s.close(); }
               catch (IOException e2) {}
And this is the output:
!java.net.ConnectException: Connection refused: connect
What should I do. I found that the problem is with the server I am connecting to and I tried connecting to dif. computers, or to stuff online, and nothing works.
Any suggestions for me?
Forgot: I tried this on both a windows XP and Vista
Edited by: xpatrickerx on Mar 23, 2008 8:12 PM
Tampering with it, I find that the error occurs on the following line:
s = new Socket("localhost", PORT);
Edited by: xpatrickerx on Mar 23, 2008 8:13 PM

Answer 1

So I finally found how to use printStackTrace and here is what it gives when:
1) I use my own computer:
java.net.ConnectException: Connection refused: connect
     at java.net.PlainSocketImpl.socketConnect(Native Method)
     at java.net.PlainSocketImpl.doConnect(Unknown Source)
     at java.net.PlainSocketImpl.connectToAddress(Unknown Source)
     at java.net.PlainSocketImpl.connect(Unknown Source)
     at java.net.SocksSocketImpl.connect(Unknown Source)
     at java.net.Socket.connect(Unknown Source)
     at java.net.Socket.connect(Unknown Source)
     at java.net.Socket.<init>(Unknown Source)
     at java.net.Socket.<init>(Unknown Source)
     at temp.main(temp.java:11)
2) I use something else:
java.net.ConnectException: Connection timed out: connect
     at java.net.PlainSocketImpl.socketConnect(Native Method)
     at java.net.PlainSocketImpl.doConnect(Unknown Source)
     at java.net.PlainSocketImpl.connectToAddress(Unknown Source)
     at java.net.PlainSocketImpl.connect(Unknown Source)
     at java.net.SocksSocketImpl.connect(Unknown Source)
     at java.net.Socket.connect(Unknown Source)
     at java.net.Socket.connect(Unknown Source)
     at java.net.Socket.<init>(Unknown Source)
     at java.net.Socket.<init>(Unknown Source)
     at temp.main(temp.java:11)
Again, thanks