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POJava chat socket reading and sending data
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  1. POJava chat socket reading and sending data
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    copied!<p>I successfully developed an app which you can create/connect to a server. I have a class named Person in which I have a public static LinkedList. In this list I'm storing clients who are connected to the server. The server/client classes are in the same package. The server and the client classes are extending Threads (they are working in the background).</p> <p>What I'm trying to do.</p> <ol> <li>I want to send the online client list (LinkedList) to all clients who are connected to the server.</li> <li>I want to read data (String from StyledText) from clients and write it to the global main chat area (StyledText).</li> </ol> <p>(something like mIRC program).</p> <p>I have read and searched all day long, but I never saw a good explanation, example or documentation about "Java chat app". I found with AWT, Swing, but the problem is I have knowledge only in SWT. Also, I found tutorials with TELNET, and the Input and Output Stream was read and wrote in the console (CMD). Am I need to use InputStreamReader, BufferedStreamReader and PrintWriter? If I have, am I need to convert those data in byte array then convert them into Objects?</p> <p>I post some screenshots for a better understanding:</p> <p><img src="https://i.stack.imgur.com/GgQtB.png" alt="enter image description here"></p> <p><img src="https://i.stack.imgur.com/NM3Kh.png" alt="enter image description here"></p> <p>This is how I create the server:</p> <pre><code>DialogServer dialog = new DialogServer(new Shell()); dialog.create(); if(dialog.open() == Window.OK){ new Server(serverAddress).start(); //dialog sets serverAddress as a String IP } </code></pre> <p><strong>Server class:</strong></p> <pre><code>public class Server extends Thread{ private static ServerSocket serverSocket; private static Socket socket; private static String address; public Server(String address){ this.address = address; } public void run(){ try { serverSocket = new ServerSocket(5000, 10, InetAddress.getByName(address)); View.serverUp = true; View.log("Server is up. Listening on " + address + ":5000"); Person p = new Person(View.nickname, true, 100.0); Person.listPeople.add(p); //add ADMIN to static LinkedList while(true){ socket = serverSocket.accept(); new Client(socket).start(); // client class thread refresOnlineList(); // refresh UI table } } catch (UnknownHostException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } public static void refresOnlineList(){ View.display.syncExec(new Runnable() { @Override public void run() { // TODO Auto-generated method stub View.tableViewer.refresh(); // TableViewer which contains online client list } }); } } </code></pre> <p>Dialog to connect to the server:</p> <pre><code> DialogConnect dialog = new DialogConnect(new Shell()); dialog.create(); if(dialog.open() == Window.OK){ new Client(connectAddress, connectNickname).start(); // dialog sets String parameters. new Client start a new Thread for a client. } </code></pre> <p><strong>Client class:</strong></p> <pre><code>public class Client extends Thread{ private static Socket socket; private static String nickname; public Client(Socket socket){ this.socket = socket; } public Client(String address, String nickname){ socket = new Socket(); try { socket.connect(new InetSocketAddress(address, 5000), 10); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); View.log("Cannot connect to server."); } this.nickname = nickname; } public void run(){ try { Person p = new Person(nickname, false, 15.4); Person.listPeople.add(p); // add PERSON to static LinkedList socket.close(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } </code></pre> <p>Developed in Eclipse RCP 3.8</p>
 

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