Client.java

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.Socket;

public class Client {
    public static void main(String[] args) {
        if(args.length < 2) {
            System.out.println("use: java Client <hostname> <port>\n");
            System.exit(1);
        }

        var hostname = args[0];
        int port = Integer.parseInt(args[1]);

        try (Socket s = new Socket(hostname, port)) {
            BufferedReader userIn = new BufferedReader(new InputStreamReader(System.in));
            BufferedReader netIn = new BufferedReader(new InputStreamReader(s.getInputStream(), "UTF-8"));
            BufferedWriter netOut = new BufferedWriter(new OutputStreamWriter(s.getOutputStream(), "UTF-8"));

            for(;;) {
                String mese, tipo, n_res;

                System.out.println("mese ('fine per terminare'):");
                if((mese = userIn.readLine()).equals("fine")) break;
                
                System.out.println("tipo ('fine per terminare'):");
                if((tipo = userIn.readLine()).equals("fine")) break;
                
                System.out.println("risultati [ > 0] ('fine per terminare'):");
                if((n_res = userIn.readLine()).equals("fine")) break;

                netOut.write(mese); netOut.newLine();
                netOut.write(tipo); netOut.newLine();
                netOut.write(n_res); netOut.newLine();
                netOut.flush();

                for(;;) {
                    String line;
                    if((line = netIn.readLine()).equals("----- END REQUEST -----")) {
                        System.out.println(line);
                        break;
                    }
                    System.out.println(line);
                }
            }
            s.close();
        } catch(IOException e ) {
            System.err.println(e.getMessage());
            e.printStackTrace();
            System.exit(2);
        }
    }
}