Thread: TCP JAva Server - Username, Password

Hi, i would like to add 2 methods. Username and password. Client enter the username into the command line and server saves it. Then client enter the password. The password should be sum of ASCII values from the username. Finally the server should make a control and if the password equals the ASCII sum, it should by everything OK and server can do some other stuff.

Do you have any idea how i can add these two methods ? Thank you !

public class Server extends Thread {
 
    StringBuilder sb = new StringBuilder();
    int indicator = 0;
    Socket socket;
    String name = "";
    String password = "";
 
    public static void main(String[] args) {
        try {
            ServerSocket ss = new ServerSocket(3618);
            while (true) {
                Socket s = ss.accept();
                Server srv = new Server();
                srv.socket = s;
                srv.start();
            }
        } catch (IOException ex) {
            Logger.getLogger(Server.class.getName()).log(Level.SEVERE, null, ex);
        }
    }
    @Override
    public void run() {
        try {
            String str = "";
            int chars;
            int ch = 0;
            PrintWriter out = new PrintWriter(socket.getOutputStream(), true);
            BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
 
            while ((chars = in.read()) != -1) {
                sb.append((char) chars);
                str = sb.toString();
            }
        } catch (IOException ex) {
            Logger.getLogger(Server.class.getName()).log(Level.SEVERE, null, ex);
        }
    }
 
    void sendMessage(String message, PrintWriter pw) {
        pw.write(message);
        pw.flush();
    }

I just start the server and connect to it using windows command line: telnet localhost <portnumber>. I have no GUI. I just ned to know, how to get username and password from command line and save it to variables.

Originally Posted by Norm

See the Scanner class for methods to read input data from a user.

If you are asking about what is passed to the main() method on the commandline when the class is executed, the contents of the command line are passed to main() in a String array.

I think Scanner(System.in) doesnt solve my problem. I am connected via command line in windows and i am sending commands.