Close reading messages from server

src/main/java/ChatClient.java

@@ -66,6 +66,13 @@ public class ChatClient extends JFrame implements KeyListener {
             } catch (IOException e) {
                 e.printStackTrace();
             }
+
+            try {
+                fromServerReader.close();
+            } catch (IOException e) {
+                e.printStackTrace();
+            }
+
         }
     }