Help with client server chat2

Hi aggain,
And here is my Client part of program
Server part is in topic "help with client server1
CLIENT.JAVA
import java.io.*;
import java.net.*;
import java.lang.*;
import javax.swing.*;
public class Client {
private static int SBAP_PORT = 5555;
private static String server = "localhost";
public static Socket socket = null;
//main starts
public static void main(String[] args) {
try { //handle broken connection
//set up connection to server, input, output streams
try {
socket = new Socket(server, SBAP_PORT);
// handle wrong host/port errors
catch (UnknownHostException e) {
System.out.println("Unknown IP address for server.");
System.exit(0);
} //end catch UnknownHost
catch (IOException ex) {
System.out.println("No server found at specified port.");
System.exit(0);
} //end catch IOException
catch (Exception exc) {
System.out.println("Error :" + exc);
System.exit(0);
} //end cath Exception exc
InputStream input = socket.getInputStream();
OutputStream output = socket.getOutputStream();
BufferedReader reader = new BufferedReader(new InputStreamReader(input));
PrintWriter writer = new PrintWriter(output);
while (true) {
String client_in = JOptionPane.showInputDialog(null, "Client Request");
System.out.println("Sending: " + client_in);
writer.print(client_in);
writer.flush();
//read server entry and dispay
String response = reader.readLine();
if (response == null || response.equals("QUIT"))
System.out.println("No data received");
else
System.out.println("Receiving: " + response);
} //end try
catch (IOException e) {
System.out.println("Connection with server broken:" + e);
System.exit(0);
} //end catch IOException
catch (Exception exp) {
System.out.println("Error :" + exp);
System.exit(0);
} //end catch exp
}//end main()
}//end class Client

http://forum.java.sun.com/thread.jspa?threadID=574466&messageID=2861516#2861516

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    http://forum.java.sun.com/thread.jspa?threadID=574466&messageID=2861516#2861516

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    import java.awt.*;
    import java.awt.event.*;
    import javax.swing.*;
    import java.applet.*;
    public class Client extends JFrame implements ActionListener {
         // Text field for receiving radius
         private JTextField jtf = new JTextField(40);
         // Text area to display contents
         private JTextArea jta = new JTextArea();
         // IO streams
         DataOutputStream osToServer;
         DataInputStream isFromServer;
         public static void main(String[] args) {
              new Client();
         public Client() {
              // Ask the user for a name
              String s = JOptionPane.showInputDialog
                   (null, "Please Enter Your Name:", "ZedX Web Messenger", JOptionPane.QUESTION_MESSAGE);
              // Panel p to hold the label and text field
              JPanel p = new JPanel();
              p.setLayout(new BorderLayout());
              p.add(new JLabel("Enter Text"), BorderLayout.WEST);
              p.add(jtf, BorderLayout.CENTER);
              p.add(new JButton("Go"), BorderLayout.EAST);
              jtf.setHorizontalAlignment(JTextField.LEFT);
    //          jta.editable(false);
              getContentPane().setLayout(new BorderLayout());
              getContentPane().add(p, BorderLayout.NORTH);
              getContentPane().add(new JScrollPane(jta), BorderLayout.CENTER);
              jtf.addActionListener(this); // Register listener
              String user = "Client";
              setTitle(user);
              setSize(500,500);
              setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
              setVisible(true); // It is necessary to show the frame here!
              try {
                   // Create a socket to connect to the server
                   Socket connectToServer = new Socket("10.0.5.39", 8000);
                   // Create an input stream to receive data from the server
                   isFromServer = new DataInputStream(
                        connectToServer.getInputStream());
                   // Create an output stream to send data to the server
                   osToServer = new DataOutputStream(connectToServer.getOutputStream());
                   // Send client Name to server
                   // Get client number and name from server
                   double cn = isFromServer.readDouble();
                   user = user + " " + cn + ":  " + s;
                   setTitle(user);
              catch (IOException ex) {
                   jta.append(ex.toString() + '\n' + "Administrator must be offline, try again later.");
         public void actionPerformed(ActionEvent e) {
              String actionCommand = e.getActionCommand();
              if (e.getSource() instanceof JTextField) {
                   try {
                        // Get the text from the text field
                        String radius = jtf.getText();
                        // Send the text to the server
                        osToServer.println(radius);
                        osToServer.flush();
                        // Get text from the server
                        double area = isFromServer.readDouble();
                        // Display to the text area
                        jta.append("You Sent: " + radius + "\n");
                        jta.append("Server" + area + '\n');
                   catch (IOException ex) {
                        System.err.println(ex);
    }

    bump

  • Need Help for client - server - client question [Sockets]

    Hi
    I have read the http://java.sun.com/docs/books/tutorial/networking/sockets/index.html tutorial and made this Knock Knock Application.
    But now, I want that one client can view all the other clients which are connected to the server, and interract with a selected cleint over the server (client - server - client).
    But I have no idea how to build such a registration concept?
    A concrete hint (or link) how to realise this would be very helpful. I searched all the internet for examples, but I dont found a simple example.
    Thanks in advance
    greeds

    wSam,
    It appears that Sun considers RMI to be simpler, although less efficient than the alternative:
    http://java.sun.com/developer/technicalArticles/ALT/sockets/
    This article also talks about object serialization, which I am a fan of. Suppose that you want to send a data structure containing lots of information (like all connected users). You can actually pass an object (rather than text) across the network using ObjectOutputStream and receive it on the other end with ObjectInputStream. You might create your own Command class for passing objects between the client and server instead of using RMI. The Command class might hold flags that indicate which method should take place on the remote machine (i.e. send chess move command).

  • Need help clarifying client/server TNS communication

    Im trying to get a clearer understanding of service/listener registration in the Oracle client/server architechure. Feel free to point out errors in my understanding.
    When an Oracle client connects to the server, it forms its connect descriptor based on the clients tnsnames.ora file. The client then checks the specified port on the host in the connect descriptor for a listener that is registered with the service defined in the
    (CONNECT_DATA =
    (SERVICE_NAME = TESTSERVICE)
    portion of the client's tnsnames file. Correct?
    Does the listener gets its list of SIDs its registered with from the SID_LIST section of the listener.ora file or the tnsnames file?
    If the listener gets its list of SIDs to register with from the tnsnames file, is that the tnsnames file on the server?
    If so, then what is the SID_LIST used for in the listener.ora file?
    Im trying to connect the dots and any help would be much appreciated.
    Thanks,

    Reading below documents would help you understand how client/server TNS communication works:-
    Listener Architecture
    http://download-east.oracle.com/docs/cd/B14117_01/network.101/b10775/architecture.htm#sthref445
    Configuring Naming Methods
    http://download-east.oracle.com/docs/cd/B14117_01/network.101/b10775/naming.htm
    Configuring and Administering the Listener
    http://download-east.oracle.com/docs/cd/B14117_01/network.101/b10775/listenercfg.htm

  • Help in client server project

    Asalam-o-Alikum!
    I m writing client server project. In that project there are many classes that are being used in both (client application and server application). Im using JCreator and also netbeans 5.5 IDE. Plz anyone can help that should i design 1 project for cilent and server. or 2 different projects 1 for client and 1 for server. If i have to use 2 different projects than how can I make available those classes to both projects (client and server) that are being shared by client and server. and i have to make 1 project than how can i run both client and server separately.
    thanks in advance.

    Aslam-o-Alikum!
    I am designing a new project that depends on another project. I want to use the classes made in previous project into my new project. Someone (as above) has told me to make the jar file of that class and set the class path to that jar file. Anyone can further tell me that how can set the class path of that project into my new project. And how to import the classes from that project that i have made previously???
    Example:
    I am designing project name "A" and i have to use a class "b" that not the part of project "A". But actually it is part of project "B". That i have made previously. Please tell how this can be achieved? making jar file of project "B" is right answere then how can i set the path of project "B" in project "A". and how to import class "b" into project "A". I am using JCreator pro 4.0
    This is the summary of obove posts. so plz dont read above posts just read this and plz help me if u could.
    Plz reply me with a simple example.
    Thanks in advance...!

  • Help with SQL Server 2005 http Endpoint

    I am trying to use mx:webservice to directly connect to a SQL
    Server 2005 HTTP Endpoint. Is this possible. Is there going to be a
    problem with crossdomain issues? If the Endpoint is actively
    listening on port 80 then IIS cannot. So I cannot place
    crossdomain.xml in webserver, how will I overcome this crossdomain
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    has an example it would be appreciated. All I want is a flex2 app
    talking directly to sql server. Seems possible.

    Kent, I see that many others have reported that error (doing
    a google search), but I see no ready answers. I saw something that
    reminded me of a connection string value that I've seen answer some
    problems. May be worth a shot for you: try adding this string to
    the connection string (in "advanced options") for your datasource:
    AuthenticationMethod=Type2
    If it doesn't solve it, remove it. But keep it handy in case
    it ever may help with some other problem.
    Here's one other possible answer for you:
    http://www.webmasterkb.com/Uwe/Forum.aspx/coldfusion-server/3206/SQL-Server-2000-Windows-A uth
    Sorry I can't be more clear for you.

  • Help with a server - crashed after update -SOLVED

    Hi everybody.
    at the school where I study,. its the student who´ll take cake of the network, and now we have a really big problem...
    After an pacman -Syu, (by an older student) one of the servers crashe. Its the only one that´s been updatet. Its run f.i. Apache , stunnel and up against an LDap server.
    The problem is that the only way you can get into it, is in single user mode. At normal boot at the login-menu - we could type in the username and passwd, but the machine is too long to validate the passwd so it times out. thats also when you trying to lock in as root. And we cant start Apache(Even though we selv compiled it, and not did a pacman on that one.)  But I´m not into arch that much yet, so hoefully someone can give me a hint about what went wrong during the updates..
    But the worst part about that one is, that everything goes by that one, so we cant get in på using ssh..  But after 7 hours trying and studying the net - we didn´t get anywhere. and we don´t have a clue what to do ...
    looking in the logfiles do not show anything unusual....
    in normalboot at the login screen, after ca. 40sek. the message comes :
    The server died unexpectet... thats it
    So please help with this one - if anyone have a clue what went wrong..

    Heya,
    have you tried using a knoppix-cd or another live-cd to have a look at the system or isn't that a possibility?
    You can also login by adding the following kernelparameter: init=/bin/sh
    However, I'm not sure how to mount the partitions then.
    I'm guessing that the message "server died unexpectedly" is coming from a certain server-process (not the machine). Do you know which process and have you had a look at the logfiles (if there are any) of that process?
    You can have a look at the output of the "dmesg"-command maybe if it is kernel-related (I think).
    You say it isn't overridden. Are you sure? You can tell pacman to not override packages or certain files, but you have to mention it in the "/etc/pacman.conf"-file.
    Hopes this helps you,
    greetings,
    Michel

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