ConnectException

Question

Hi, I'm writing a chat program in Java and have an essential program in my connection sequence. Have the same lines in another program and they work hope you can help me.
This is the probematic code:
import hsa.Console;
import java.net.*;
import java.io.*;
public class ChatProgram
static Console c;
private static final int PORT = 7;
public static void main (String[] args) throws Exception
c = new Console ();
Socket sock = null;
ChatHistory.cleanHistory ();
c.println ("Do you want to: a) contact a client");
c.println (" b) be contacted");
if (c.readLine ().equals ("a"))
c.clear ();
c.println ("Please enter the clients IP");
String ipAddress = c.readLine ();
sock = new Socket (ipAddress, 7);
String client = sock.getInetAddress ().getHostName ();
c.clear ();
ChatHistory.wHistory ("Connection established to " + ipAddress +
" (" + client + ")\n");
if (c.readLine ().equals ("b"))
c.clear ();
ServerSocket servSock = new ServerSocket (PORT);
String message = "";
sock = servSock.accept ();
String client = sock.getInetAddress ().getHostName ();
ChatHistory.wHistory ("Connection established with client " + client + "\n");
new ReceiveThread (sock).start ();
new SendThread (sock).start ();
And this is the error message:
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.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 ChatProgram.main(ChatProgram.java:22)
If you need the classes just write.
thx
m0rbid

Answer 1

If you pass a literal IP address to InetAddress.getByName then it specified to validate that the address format is correct. That might be useful to you. However, given that the Socket ctor is throwing a ConnectException it means that it's already validating the address format and the ConnectException is because the connect failed. As I mentioned in an earilier reply, it might be good to get find out the IP address that this is failing on and check that you can in fact connect to that address.