Worker.java

import java.io.*;
import java.net.*;
import java.util.Scanner;

public class Worker {

    public Socket socket;
    public BufferedWriter bufferedWriter;
    public BufferedReader bufferedReader;
    public String username;

    public Worker(Socket socket, String username) {
        try {
            this.socket = socket;
            this.bufferedReader = new BufferedReader(new InputStreamReader(socket.getInputStream()));
            this.bufferedWriter = new BufferedWriter(new OutputStreamWriter(socket.getOutputStream()));
            this.username = username;
        } catch (IOException e) {
            closeEverything(socket, bufferedReader, bufferedWriter);
        }
    }

    public void sendMessage() {
        try {
            bufferedWriter.write(username);
            bufferedWriter.newLine();
            bufferedWriter.flush();

            Scanner scanner = new Scanner(System.in);

            while (socket.isConnected()) {
                String messageToSend = scanner.nextLine();
                bufferedWriter.write(username + "-worker: " + messageToSend);
                bufferedWriter.newLine();
                bufferedWriter.flush();
            }
        } catch (IOException e) {
            closeEverything(socket, bufferedReader, bufferedWriter);
        }
    }

    public void listenForMessage() {
        new Thread(new Runnable() {
            @Override
            public void run() {
                String msgFromGroupChat;

                while (socket.isConnected()) {
                    try {
                        msgFromGroupChat = bufferedReader.readLine();
                        System.out.println(msgFromGroupChat);
                    } catch (IOException e) {
                        closeEverything(socket, bufferedReader, bufferedWriter);
                    }

                }
            }
        }).start();
    }

    public void closeEverything(Socket socket, BufferedReader bufferedReader, BufferedWriter bufferedWriter) {
        try {
            if (bufferedReader != null) {
                bufferedReader.close();
            }
            if (bufferedWriter != null) {
                bufferedWriter.close();

            }
            if (socket != null) {
                socket.close();
            }

        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public static void main(String[] args) throws UnknownHostException, IOException {
        Scanner scanner = new Scanner(System.in);
        System.out.println("What is your worker name : ");
        String username = scanner.nextLine();
        Socket socket = new Socket("localhost", 1234);
        Worker worker = new Worker(socket, username);
        worker.listenForMessage();
        worker.sendMessage();
    }
}