ChatApplication/Client.java at main · poojadonode28/ChatApplication · GitHub

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import java.net.*;

import javax.swing.BorderFactory;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.SwingConstants;

import java.awt.BorderLayout;

import java.awt.Font;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.io.*;

public class Client extends JFrame {
    Socket socket;

    BufferedReader br;
    PrintWriter out;
    // create component
    private JLabel heading = new JLabel("Client Area");
    private JTextArea messageArea = new JTextArea();
    private JTextField messageInput = new JTextField();
    private Font font = new Font("Roboto", Font.PLAIN, 20);

    // constructor
    public Client() {
        try {
            System.out.println("Sending request to Server");
            socket = new Socket("127.0.0.1", 7778);
            System.out.println("connection done.....");

            br = new BufferedReader(new InputStreamReader(socket.getInputStream()));
            out = new PrintWriter(socket.getOutputStream());
            createGUI();
            handleEvents();
            startReading();

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

    private void handleEvents() {
        messageInput.addKeyListener(new KeyListener() {

            @Override
            public void keyTyped(KeyEvent e) {

            }

            @Override
            public void keyPressed(KeyEvent e) {

            }

            @Override
            public void keyReleased(KeyEvent e) {

                if (e.getKeyCode() == 10) {

                    String contentToSend = messageInput.getText();
                    messageArea.append("Me :" + contentToSend + "\n");
                    out.println(contentToSend);
                    out.flush();
                    messageInput.setText("");
                    messageInput.requestFocus();
                }

            }

        });

    }

    private void createGUI() {
        this.setTitle("Client messenger");
        this.setSize(600, 600);
        this.setLocationRelativeTo(null);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        heading.setFont(font);
        messageArea.setFont(font);
        messageInput.setFont(font);
        heading.setIcon(new ImageIcon("pngwing.com.png"));
        heading.setHorizontalAlignment(SwingConstants.CENTER);
        heading.setBorder(BorderFactory.createEmptyBorder(20, 20, 20, 20));
        messageArea.setEditable(false);
        messageInput.setHorizontalAlignment(SwingConstants.LEFT);
        this.setLayout(new BorderLayout());
        this.add(heading, BorderLayout.NORTH);
        JScrollPane jScrollPane = new JScrollPane(messageArea);
        this.add(jScrollPane, BorderLayout.CENTER);
        messageArea.setCaretPosition(messageArea.getDocument().getLength());
        this.add(messageInput, BorderLayout.SOUTH);

        this.setVisible(true);
    }

    public void startReading() {
        // create thread
        Runnable r1 = () -> {
            System.out.println("Reader started...");
            try {
                while (true) {
                    String msg = br.readLine();
                    if (msg.equals("exit")) {
                        JOptionPane.showMessageDialog(this, "Server terminated the chat");
                        messageInput.setEnabled(false);
                        socket.close();
                        break;
                    }
                    messageArea.append("Server : " + msg + "\n");
                }
            } catch (Exception e) {
                // e.printStackTrace();
                System.out.println("connection is closed");
            }

        };
        new Thread(r1).start();

    }

    public static void main(String[] args) {
        System.out.println("Hello client");
        new Client();
    }

}