Create connection to server using socket

src/main/java/ChatClient.java

@@ -1,12 +1,31 @@
 import javax.swing.*;
+import java.io.IOException;
+import java.net.Socket;
 
 public class ChatClient {
     private String address;
-    public ChatClient() {
+    private int port;
+    private Socket connectionToServer;
+    
+    public ChatClient(int port) {
+        this.port = port;
         address = JOptionPane.showInputDialog("bitte IP-Adresse");
+        
+        if (address != null) {
+            receiveMessages();
+        }
+    }
+
+    private void receiveMessages() {
+        try {
+            connectionToServer = new Socket(address, port);
+        } catch (IOException e) {
+            JOptionPane.showMessageDialog(null, "Verbindung zum Server \"" + address + "\" fehlgeschlagen.");
+        }
     }
 
     public static void main(String[] args) {
-        new ChatClient();
+        new ChatClient(3141);
+        
     }
 }