public static void initGui(MinecraftServer minecraftserver) { try { UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); } catch (Exception) { } var servergui = new ServerGUI(minecraftserver); var jframe = new JFrame("Minecraft server"); jframe.add(servergui); jframe.pack(); jframe.setLocationRelativeTo(null); jframe.setVisible(true); jframe.addWindowListener(new ServerWindowAdapter(minecraftserver)); }