Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.InetAddress;
import java.net.ServerSocket;
import java.net.Socket;

public class Main {
    public static void main(String[] args) throws Exception {
        ServerSocket serverSocket = new ServerSocket(12900, 100, InetAddress.getByName("localhost"));
        System.out.println("Server started  at:  " + serverSocket);

        while (true) {
            System.out.println("Waiting for a  connection...");

            final Socket activeSocket = serverSocket.accept();

            System.out.println("Received a  connection from  " + activeSocket);
            Runnable runnable = () -> handleClientRequest(activeSocket);
            new Thread(runnable).start(); // start a new thread
        }
    }

    public static void handleClientRequest(Socket socket) {
        try {
            BufferedReader socketReader = null;
            BufferedWriter socketWriter = null;
            socketReader = new BufferedReader(new InputStreamReader(socket.getInputStream()));
            socketWriter = new BufferedWriter(new OutputStreamWriter(socket.getOutputStream()));

            String inMsg = null;
            while ((inMsg = socketReader.readLine()) != null) {
                System.out.println("Received from  client: " + inMsg);

                String outMsg = inMsg;
                socketWriter.write(outMsg);
                socketWriter.write("\n");
                socketWriter.flush();
            }
            socket.close();
        } catch (Exception e) {
            e.printStackTrace();
        }

    }
}