//* Single Client Echo server in Java, echoing one line of text at a time *
import java.io.InputStreamReader;
import java.io.BufferedReader;
import java.io.PrintWriter;
import java.net.Socket;
import java.net.ServerSocket;

class Test {
    // what port people will be "knocking at"/ connecting to
    static final int port = 60000;
    // maximum # of connections waiting to be taken care of
    static final int maxque = 2;

    public static void main(String A[]) {
        try {
            ServerSocket SERV= new ServerSocket(port, maxque);
            System.out.println("Test server started at port "+port);

            while (true) 
            // let us try to catch local errors inside this loop without quiting the server
            try {
                // wait for the next client connection
                Socket SO=SERV.accept();
                System.out.println("A new client connected from "+SO.getInetAddress());

                // create a stream for reading via socket connection
                BufferedReader SR=new BufferedReader(new InputStreamReader(SO.getInputStream()));
                // create a stream for writing via socket connection
                PrintWriter SW=new PrintWriter (SO.getOutputStream());

                SW.println("I am listening to you.");
                SW.flush();
                System.out.println("listening...");
                while (true) {
                    String line=SR.readLine();
                    if (line==null) break;
                    System.out.println(line);
                }
                SO.close();
                System.out.println("The client closed connection.");
            } catch (Exception e) {
                System.out.println("Ops! "+e);
                System.out.println("Returning to main server loop.");
            }
        } catch (Exception e) {
            System.out.println("Fatal Ops! "+e);
        }
    }
}