Receiver_1.java

import java.awt.EventQueue;

import javax.swing.JFrame;
import javax.swing.JLabel;
import java.awt.BorderLayout;
import java.awt.Font;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;

import javax.swing.JTextField;
import javax.swing.JTextArea;
import javax.swing.JButton;

public class Receiver_1 {

    private JFrame frame;
    private JTextField textField;

    /**
     * Launch the application.
     */
    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    Receiver_1 window = new Receiver_1();
                    window.frame.setVisible(true);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }

    /**
     * Create the application.
     */
    public Receiver_1() {
        initialize();
    }

    /**
     * Initialize the contents of the frame.
     */
    private void initialize() {
        frame = new JFrame();
        frame.setBounds(100, 100, 450, 300);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.getContentPane().setLayout(null);

        JLabel lblNewLabel = new JLabel("String Receive");
        lblNewLabel.setFont(new Font("Tahoma", Font.BOLD, 12));
        lblNewLabel.setBounds(37, 62, 107, 13);
        frame.getContentPane().add(lblNewLabel);

        JLabel lblMessage = new JLabel("Message");
        lblMessage.setFont(new Font("Tahoma", Font.BOLD, 12));
        lblMessage.setBounds(37, 93, 107, 13);
        frame.getContentPane().add(lblMessage);

        textField = new JTextField();
        textField.setFont(new Font("Tahoma", Font.BOLD, 12));
        textField.setBounds(156, 60, 96, 19);
        frame.getContentPane().add(textField);
        textField.setColumns(10);

        try {
            ServerSocket ss = new ServerSocket(8081);

            while (true) {
                Socket s = ss.accept();
                DataInputStream in = new DataInputStream(s.getInputStream());
                String strSender = in.readUTF();

                textField.setText(strSender);
                String strToSend = "";

//                try {
//                    int intCast = Integer.parseInt(strSender.trim());
//
//                    if (intCast % 2 == 0) {
//                        strToSend = "You sent even number";
//                    } else {
//                        strToSend = "You sent odd number";
//                    }
//                } catch (NumberFormatException pe) {
//                    strToSend = "Please send a number la!";
//                }
//
//                DataOutputStream out = new DataOutputStream(s.getOutputStream());
//                out.writeUTF(strToSend);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }

        JTextArea textArea = new JTextArea();
        textArea.setFont(new Font("Monospaced", Font.PLAIN, 13));
        textArea.setBounds(154, 104, 220, 100);
        frame.getContentPane().add(textArea);

        JButton btnNewButton = new JButton("Send to Sender");
        btnNewButton.setFont(new Font("Tahoma", Font.BOLD, 12));
        btnNewButton.setBounds(132, 232, 139, 21);
        frame.getContentPane().add(btnNewButton);
    }

}