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POJava server client (I/O connectionException)
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copied!<p>I have written a program where the client should be able to establish connection, and write to som message to the server. And the server should print this message.</p> <p>The problem is that once the client connect to the server, I get an exception with the following message:</p> <pre><code>java.net.ConnectException: connect: Address is invalid on local machine, or port is not valid on remote machine at java.net.PlainSocketImpl.socketConnect(Native Method) at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:351) at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:213) at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:200) at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366) at java.net.Socket.connect(Socket.java:529) at java.net.Socket.connect(Socket.java:478) at java.net.Socket.<init>(Socket.java:375) at java.net.Socket.<init>(Socket.java:189) at Client.<init>(Client.java:21) at Server.startServer(Server.java:42) at Server.main(Server.java:62) </code></pre> <p>My code for the server is as shown below:</p> <pre><code>import java.io.*; import java.net.*; public class Server { private int port = 5555; public void printServerAddress() { InetAddress i = null; String host = null; try { i = InetAddress.getLocalHost(); } catch (UnknownHostException e) { e.printStackTrace(); } host = i.getHostAddress(); System.out.println("Contact this server at address: " + host + " and port: " + port); } public void startServer() { ServerSocket serverSocket = null; BufferedReader reader = null; Socket socket = null; String fromClient = null; try { serverSocket = new ServerSocket(port); while(true) { socket = serverSocket.accept(); reader = new BufferedReader(new InputStreamReader(socket.getInputStream())); if(socket != null) { System.out.println("Connection from: " + socket); } Thread thread = new Thread(new Client(socket)); thread.start(); while((fromClient = reader.readLine()) != null) { System.out.println("From client: " + fromClient); } reader.close(); socket.close(); } } catch (IOException e) { } } public static void main(String[] args) { Server server = new Server(); server.printServerAddress(); server.startServer(); } } </code></pre> <p>And the code for the client is:</p> <pre><code>import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.io.PrintWriter; import java.net.Socket; import java.net.UnknownHostException; import java.util.Scanner; public class Client implements Runnable{ private int port; private String serverAddress; private PrintWriter writer; private BufferedReader reader; public Client(Socket socket) { try { socket = new Socket(serverAddress, port); writer = new PrintWriter(socket.getOutputStream(), true); reader = new BufferedReader(new InputStreamReader(socket.getInputStream())); } catch (UnknownHostException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } @Override public void run() { System.out.println("Write message to server:"); Scanner scanner = new Scanner(System.in); while(scanner.next() != "quit") { writeToServer(scanner.next()); } writer.close(); } public void writeToServer(String message) { writer.write(message); } public void readFromServer() { String msg = null; try { while((msg = reader.readLine()) != null) { System.out.println("From server: " + msg); } reader.close(); } catch (IOException e) { e.printStackTrace(); } } public static void main(String[] args) throws UnknownHostException, IOException { Socket s = new Socket("localhost", 5555); new Client(s); } } </code></pre> <p>Any idea on what I did wrong, and how to fix my problem?</p>

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