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POJava - about socket: how to change thread without rebooting server
 

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    <p>Got a problem about server-client:</p> <p>When server is running, if I want to make some change in ServerThread, for example, the string "Welcome!" to "Hello!", is that possible to execute that without restart the server? For now, when I change "Welcome!" to something else, it still print out "Welcome!" to client. I have to close eclipse and restart server for this new string working. Is there any way to solve that problem? Thx alot!</p> <p>Server:</p> <pre><code>import java.net.*; import java.io.*; public class ATMServer { private static int connectionPort = 8989; public static void main(String[] args) throws IOException { ServerSocket serverSocket = null; boolean listening = true; try { serverSocket = new ServerSocket(connectionPort); } catch (IOException e) { System.err.println("Could not listen on port: " + connectionPort); System.exit(1); } System.out.println("Bank started listening on port: " + connectionPort); while (listening) new ATMServerThread(serverSocket.accept()).start(); serverSocket.close(); } } </code></pre> <p>ServerThread:</p> <pre><code>import java.io.*; import java.net.*; public class ATMServerThread extends Thread { private Socket socket = null; private BufferedReader in; PrintWriter out; public ATMServerThread(Socket socket) { super("ATMServerThread"); this.socket = socket; } public void run(){ try { out = new PrintWriter(socket.getOutputStream(), true); out.println("Welcome!"); } catch (IOException e){ e.printStackTrace(); } } } </code></pre> <p>Client: </p> <pre><code>import java.io.*; import java.net.*; import java.util.Scanner; public class Client { private static int connectionPort = 8989; public static void main(String[] args) throws IOException { Socket ATMSocket = null; PrintWriter out = null; BufferedReader in = null; String adress = ""; try { adress = "127.0.0.1"; } catch (ArrayIndexOutOfBoundsException e) { System.err.println("Missing argument ip-adress"); System.exit(1); } try { ATMSocket = new Socket(adress, connectionPort); out = new PrintWriter(ATMSocket.getOutputStream(), true); in = new BufferedReader(new InputStreamReader (ATMSocket.getInputStream())); } catch (UnknownHostException e) { System.err.println("Unknown host: " +adress); System.exit(1); } catch (IOException e) { System.err.println("Couldn't open connection to " + adress); System.exit(1); } System.out.println(in.readLine()); out.close(); in.close(); ATMSocket.close(); } } </code></pre>
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    1. COThis question is an example of why IDE's are sometimes a dangerous tool for new developers. @Ferry, you will learn ALOT about Java if you take this code you have written and play with it awhile OUTSIDE of Eclipse. Then come back here and reformulate your question.
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