Cleanup

src/net/knarcraft/serverlauncher/userinterface/Console.java

@@ -12,8 +12,8 @@ import java.awt.*;
  * @since       0.0.0.1
  */
 class Console {
-    private JTextField textInput;
-    private JTextArea textOutput;
+    private final JTextField textInput;
+    private final JTextArea textOutput;
 
     void output(String text) {
         this.textOutput.setText(text);

src/net/knarcraft/serverlauncher/userinterface/GUI.java

@@ -384,6 +384,8 @@ public class GUI implements ActionListener {
         this.serversPane = tabbedPane_1;
         tabbedPane_1.setTabLayoutPolicy(JTabbedPane.SCROLL_TAB_LAYOUT);
 
+        frame.setPreferredSize(frame.getPreferredSize());
+        frame.validate();
         frame.setVisible(true);
     }
 
@@ -426,12 +428,7 @@ public class GUI implements ActionListener {
             goToURL("https://knarcraft.net/Bungeeminecraftserverlauncher/Story/");
         } else if (e.getSource() == btnStartServer) {
             this.save();
-            Executors.newSingleThreadExecutor().execute(new Runnable() {
-                @Override
-                public void run() {
-                    Server.startServers();
-                }
-            });
+            Executors.newSingleThreadExecutor().execute(Server::startServers);
         } else if (e.getSource() == btnStopServer) {
             stop();
         } else if (e.getSource() == addServer) {

src/net/knarcraft/serverlauncher/userinterface/ServerConsoles.java

@@ -17,8 +17,8 @@ import java.util.ArrayList;
 public class ServerConsoles {
     private static ServerConsoles serverConsoles;
     private static ArrayList<Console> consoles = new ArrayList<>();
-    private JFrame frame;
-    private JTabbedPane consolesTab;
+    private final JFrame frame;
+    private final JTabbedPane consolesTab;
 
     public ServerConsoles() {
         frame = new JFrame();