Send message to server when user presses enter

src/main/java/ChatClient.java

@@ -2,13 +2,14 @@ import javax.swing.*;
 import java.awt.*;
 import java.awt.event.KeyEvent;
 import java.awt.event.KeyListener;
-import java.io.IOException;
+import java.io.*;
 import java.net.Socket;
 
 public class ChatClient extends JFrame implements KeyListener {
     private String address;
     private int port;
     private Socket connectionToServer;
+    private PrintWriter toServerWriter;
 
     // GUI
     private JTextArea outputTextArea;
@@ -43,8 +44,9 @@ public class ChatClient extends JFrame implements KeyListener {
     private void receiveMessages() {
         try {
             connectionToServer = new Socket(address, port);
+            toServerWriter = new PrintWriter(new OutputStreamWriter(connectionToServer.getOutputStream()));
             initGui();
-        } catch (Exception e) {
+        } catch (IOException e) {
             JOptionPane.showMessageDialog(null, "Verbindung zum Server \"" + address + "\" fehlgeschlagen.");
         }
     }
@@ -59,7 +61,8 @@ public class ChatClient extends JFrame implements KeyListener {
         if (e.getKeyCode() == KeyEvent.VK_ENTER) {
             String message = inputTextField.getText();
             if (!message.isEmpty()) {
-                // Senden die Nachricht an Server, wenn der erstellt wird
+                toServerWriter.println(message);
+                toServerWriter.flush();
                 inputTextField.setText("");
             }
         }