Console.java

package net.djpowell.liverepl.client;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.Reader;
import java.io.Writer;
import java.net.InetAddress;
import java.net.Socket;
import java.util.logging.Logger;

public class Console {

    private static final String NEWLINE = System.getProperty("line.separator");
    
    public static void main(InetAddress host, int port, boolean readInput) throws Exception {
        final BufferedReader cin = new BufferedReader(new InputStreamReader(System.in));
        if (!readInput) cin.close();
        final Writer cout = new OutputStreamWriter(System.out);
        Socket s = new Socket(host, port);
        try {
            final Thread main = Thread.currentThread();
            final Reader sin = new InputStreamReader(s.getInputStream());
            final Writer sout = new BufferedWriter(new OutputStreamWriter(s.getOutputStream()));

            Thread ch = new Thread("ConsoleHandler") {
                @Override
                public void run() {
                    try {
                        for (;;) {
                            // use line-based i/o for reading from the keyboard
                            String line = cin.readLine();
                            if (line == null) break;
                            sout.write(line + NEWLINE);
                            sout.flush();
                        }
                    } catch (IOException e) {
                        TRC.fine(e.getMessage());
                    } finally {
                        main.interrupt();
                    }
                }
            };
            if (readInput) ch.start();

            Thread sh = new Thread("SocketHandler") {
                @Override
                public void run() {
                    try {
                        for (;;) {
                            // use character based i/o for printing server responses
                            int ic = sin.read();
                            if (ic == -1) break;
                            char c = (char) ic;
                            cout.write(c);
                            cout.flush();
                        }
                    } catch (IOException e) {
                        TRC.fine(e.getMessage());
                    } finally {
                        main.interrupt();
                    }
                }
            };
            sh.start();
        
            // block until both threads finish
            try {
                sh.join();
                if (readInput) ch.join();
            } catch (InterruptedException e) {
                // if either thread dies, then allow the socket to
                // close, terminating the other one
            }
        } finally {
            s.close();
        }
    }
    
    private static final Logger TRC = Logger.getLogger(Console.class.getName()); 

}