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POServer client chat room in Java
 

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  1. POServer client chat room in Java
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    <p>I was making a chat room project where the server accepts many clients, and whatever the client writes reaches the other clients and so on. Unfortunately the server accepts maximum 2 clients and after one client writes an input it gives errors.</p> <pre><code>public class Server2 { private static ArrayList&lt;Socket&gt; clients; private ServerSocket server; DataOutputStream os; DataInputStream in; Socket s; public Server2() throws IOException { server = new ServerSocket(5000); clients = new ArrayList&lt;Socket&gt;(); System.out.println("Waiting for connections..."); runOutput(); } public void addClient() throws IOException { s = server.accept(); clients.add(s); System.out.println("A new Client has joined"); } public void runOutput() { Thread n = new Thread(new Runnable() { public void run() { try { addClient(); } catch (IOException e) { e.printStackTrace(); } } }); n.start(); Thread input = new Thread(new Runnable() { public void run() { try { addClient(); in = new DataInputStream(s.getInputStream()); os = new DataOutputStream(s.getOutputStream()); String st = in.readLine(); System.out.println(st); os.writeBytes(st); for(int i = 0; i &lt; clients.size(); i++) { DataOutputStream oo = new DataOutputStream(clients.get(i).getOutputStream()); oo.writeBytes(st); } } catch (IOException e) { e.printStackTrace(); } } }); input.start(); } public static void main(String[] args) throws IOException { Server2 server = new Server2(); } } </code></pre> <p>and the client class : </p> <pre><code>public class Client2 { final public static String host = "localhost"; final public static int port = 5000; Socket socket; DataInputStream in; DataOutputStream ou; Scanner chat; boolean run; String name; public Client2(String n) throws IOException { name = n ; socket = new Socket(host , port); System.out.println("Connection Successful"); run = true; runOutput(); } public void runOutput() { Thread input = new Thread(new Runnable() { public void run() { while (run) { try { in = new DataInputStream(socket.getInputStream()); String s = in.readLine(); System.out.println(s); if(chat.nextLine().compareTo("QUIT") == 0) run = false; } catch (IOException e) { e.printStackTrace(); } } } }); input.start(); Thread t = new Thread(new Runnable() { public void run() { while (run) { try { ou = new DataOutputStream(socket.getOutputStream()); chat = new Scanner(System.in); ou.writeBytes(name + " says :" + chat.nextLine() + "\n"); } catch (IOException e) { e.printStackTrace(); } } } }); t.start(); } public static void main(String[] args) throws IOException { Client2 client = new Client2("Ahmed"); } } </code></pre>
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    1. USuser3100088
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    1. COplease post the errors you got. Also, from what i see, you call `runOutput()` once, and there is no loop, meaning `s = ss.accept()` is only gonna be called once
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      1. POServer client chat room in Java
      1. USVince Emigh
    2. COLook at my edited answer. Hope that helps you a bit
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      1. POServer client chat room in Java
      1. USVince Emigh
 

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