Initial chat room

src/main/java/org/example/ClientApp.java

@@ -0,0 +1,111 @@
+package org.example;
+
+import javax.swing.*;
+import java.awt.*;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.io.PrintWriter;
+import java.net.Socket;
+
+public class ClientApp extends JFrame {
+    private static final String SERVER_IP = "localhost";
+    private static final int SERVER_PORT = 1234;
+
+    private JTextArea chatArea;
+    private JTextField messageField;
+    private JButton sendButton;
+
+    private Socket socket;
+    private BufferedReader in;
+    private PrintWriter out;
+
+    public ClientApp() {
+        setTitle("Chat Client");
+        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+        setSize(400, 300);
+        setLayout(new BorderLayout());
+
+        chatArea = new JTextArea();
+        chatArea.setEditable(false);
+        add(new JScrollPane(chatArea), BorderLayout.CENTER);
+
+        JPanel bottomPanel = new JPanel();
+        bottomPanel.setLayout(new BorderLayout());
+
+        messageField = new JTextField();
+        bottomPanel.add(messageField, BorderLayout.CENTER);
+
+        sendButton = new JButton("Send");
+        sendButton.addActionListener(new ActionListener() {
+            @Override
+            public void actionPerformed(ActionEvent e) {
+                sendMessage();
+            }
+        });
+        bottomPanel.add(sendButton, BorderLayout.EAST);
+
+        add(bottomPanel, BorderLayout.SOUTH);
+
+        setVisible(true);
+
+        connectToServer();
+        startListening();
+    }
+
+    private void connectToServer() {
+        try {
+            socket = new Socket(SERVER_IP, SERVER_PORT);
+            in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
+            out = new PrintWriter(socket.getOutputStream(), true);
+            chatArea.append("Connected to server\n");
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+
+    private void startListening() {
+        Thread thread = new Thread(new Runnable() {
+            @Override
+            public void run() {
+                try {
+                    String serverMessage;
+                    while ((serverMessage = in.readLine()) != null) {
+                        chatArea.append("Server: " + serverMessage + "\n");
+                    }
+                } catch (IOException e) {
+                    e.printStackTrace();
+                } finally {
+                    try {
+                        in.close();
+                        out.close();
+                        socket.close();
+                    } catch (IOException e) {
+                        e.printStackTrace();
+                    }
+                }
+            }
+        });
+        thread.start();
+    }
+
+    private void sendMessage() {
+        String message = messageField.getText().trim();
+        if (!message.isEmpty()) {
+            out.println(message);
+            messageField.setText("");
+            chatArea.append("You: " + message + "\n");
+        }
+    }
+
+    public static void main(String[] args) {
+        SwingUtilities.invokeLater(new Runnable() {
+            @Override
+            public void run() {
+                new ClientApp();
+            }
+        });
+    }
+}