Got a problem about server-client:
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!
Server:
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();
}
}
ServerThread:
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();
}
}
}
Client:
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();
}
}
