Chat Server Crashing - cant find error!
Dear Forum,
With the help of a tutorial, I created the following code:
Code:
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.ArrayList;
import java.util.Iterator;
public class ServerMain {
ArrayList clientOutputStreams;
ArrayList<String> onlineUsers = new ArrayList();
public class ClientHandler implements Runnable {
BufferedReader reader;
Socket sock;
PrintWriter client;
public ClientHandler(Socket clientSocket, PrintWriter user) {
// new inputStreamReader and then add it to a BufferedReader
client = user;
try {
sock = clientSocket;
InputStreamReader isReader = new InputStreamReader(sock.getInputStream());
reader = new BufferedReader(isReader);
} // end try
catch (Exception ex) {
System.out.println("error beginning StreamReader");
} // end catch
} // end ClientHandler()
@Override
public void run() {
String message;
String[] data;
String connect = "Connect";
String disconnect = "Disconnect";
String chat = "Chat";
System.out.println("running");
try {
while ((message = reader.readLine()) != null) {
System.out.println("Received: " + message);
data = message.split("¥");
for (String token:data) {
System.out.println(token);
}
if (data[2].equals(connect)) {
tellEveryone((data[0] + "¥" + data[1] + "¥" + chat));
userAdd(data[0]);
} else if (data[2].equals(disconnect)) {
tellEveryone((data[0] + "¥has disconnected." + "¥" + chat));
userRemove(data[0]);
} else if (data[2].equals(chat)) {
tellEveryone(message);
} else {
System.out.println("No Conditions were met.");
}
} // end while
} // end try
catch (Exception ex) {
System.out.println("lost a connection");
clientOutputStreams.remove(client);
} // end catch
} // end run()
} // end class ClientHandler
public static void main (String[] args) {
new ServerMain().go();
}
public void go() {
clientOutputStreams = new ArrayList();
try {
ServerSocket serverSock = new ServerSocket(5000);
while (true) {
// set up the server writer function and then begin at the same
// the listener using the Runnable and Thread
//<editor-fold defaultstate="collapsed" desc="comment">
Socket
//</editor-fold>
clientSock = serverSock.accept();
PrintWriter writer = new PrintWriter(clientSock.getOutputStream());
clientOutputStreams.add(writer);
// use a Runnable to start a 'second main method that will run
// the listener
Thread listener = new Thread(new ClientHandler(clientSock, writer));
listener.start();
System.out.println("got a connection");
} // end while
} // end try
catch (Exception ex)
{
System.out.println("error making a connection");
} // end catch
} // end go()
public void userAdd (String data) {
String message;
String add = "¥ ¥Connect", done = "Server¥ ¥Done";
onlineUsers.add(data);
String[] tempList = new String[(onlineUsers.size())];
onlineUsers.toArray(tempList);
for (String token:tempList) {
message = (token + add);
tellEveryone(message);
}
tellEveryone(done);
}
public void userRemove (String data) {
String message;
String add = "¥ ¥Connect", done = "Server¥ ¥Done";
onlineUsers.remove(data);
String[] tempList = new String[(onlineUsers.size())];
onlineUsers.toArray(tempList);
for (String token:tempList) {
message = (token + add);
tellEveryone(message);
}
tellEveryone(done);
}
public void tellEveryone(String message) {
// sends message to everyone connected to server
Iterator it = clientOutputStreams.iterator();
while (it.hasNext()) {
try {
PrintWriter writer = (PrintWriter) it.next();
writer.println(message);
System.out.println("Sending" + message);
writer.flush();
} // end try
catch (Exception ex) {
System.out.println("error telling everyone");
} // end catch
} // end while
} // end tellEveryone()
} // end class Server
It compiles, but ends as soon as it runs with the error mesage:
error making a connection
BUILD SUCCESSFUL (total time: 0 seconds)
The debugger states:
ave no file for /System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Classes/jsfd.jar
Have no file for /System/Library/Frameworks/JavaVM.framework/Frameworks/JavaRuntimeSupport.framework/Resources/Java/JavaRuntimeSupport.jar
Have no file for /System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Classes/laf.jar
Have no file for /System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Classes/sunrsasign.jar
This has been coded with NetBeans in Mac OS X 10.7.3
Thanks
Lexo |
