qq

src/main/java/ru/molokoin/App.java

@@ -20,14 +20,14 @@ public class App extends Application {
         try {
             String link = "/face/mainframe.fxml";
             Parent root = FXMLLoader.load(getClass().getResource(link));
+            //root.getStylesheets().add(getClass().getResource("/face/styles.css").toExternalForm());
+            Scene scene = new Scene(root);
             stage.setTitle("exchange-server-settings");
-            stage.setScene(new Scene(root));
+            stage.setScene(scene);
             stage.show();
         } catch (Exception e) {
             System.out.println("Не удалось запустить сцену. Ошибка: " + e);
         }
-        
-        
     }
 
     public static void main(String[] args) {

src/main/java/ru/molokoin/MainFrameController.java

@@ -7,6 +7,7 @@ import javafx.event.Event;
 import javafx.fxml.FXML;
 import javafx.fxml.Initializable;
 import javafx.scene.control.Button;
+import javafx.scene.control.TextField;
 import javafx.scene.input.MouseEvent;
 
 public class MainFrameController implements Initializable{

src/main/resources/face/mainframe.fxml

@@ -1,10 +1,17 @@
 <?xml version="1.0" encoding="UTF-8"?>
 
+<?import javafx.scene.layout.Pane?>
 <?import javafx.scene.control.Label?>
 <?import javafx.scene.layout.VBox?>
 <?import javafx.scene.control.Button?>
+<?import javafx.scene.control.TextField?>
 
-<VBox prefHeight="200.0" prefWidth="300.0" xmlns="http://javafx.com/javafx/8.0.171" xmlns:fx="http://javafx.com/fxml/1" fx:controller="ru.molokoin.MainFrameController">
-    <Label text="exchange-server"/>
+<Pane prefHeight="400.0" prefWidth="600.0" xmlns="http://javafx.com/javafx/8.0.171" xmlns:fx="http://javafx.com/fxml/1" fx:controller="ru.molokoin.MainFrameController">
+  <children>
+    <VBox prefHeight="200.0" prefWidth="300.0" >
+        <Label text="setup the port: "/>
+        <TextField fx:id="portField" promptText="8081" />
         <Button fx:id="btn" text="START" onAction="#buttonClicked"/>
     </VBox>
+  </children>
+</Pane>

src/main/resources/face/styles.css

@@ -0,0 +1,24 @@
+.Pane {
+  background-color:black;
+  -fx-background-color:black
+}
+.VBox {
+  background-color:black;
+  -fx-background-color:black
+}
+.children {
+  background-color:black;
+  -fx-background-color:black
+}
+.Button {
+  background-color:black;
+  -fx-background-color:black
+}
+.TextField {
+  background-color:black;
+  -fx-background-color:black
+}
+.Label {
+  background-color:black;
+  -fx-background-color:black
+}

target/classes/face/mainframe.fxml

@@ -1,10 +1,17 @@
 <?xml version="1.0" encoding="UTF-8"?>
 
+<?import javafx.scene.layout.Pane?>
 <?import javafx.scene.control.Label?>
 <?import javafx.scene.layout.VBox?>
 <?import javafx.scene.control.Button?>
+<?import javafx.scene.control.TextField?>
 
-<VBox prefHeight="200.0" prefWidth="300.0" xmlns="http://javafx.com/javafx/8.0.171" xmlns:fx="http://javafx.com/fxml/1" fx:controller="ru.molokoin.MainFrameController">
-    <Label text="exchange-server"/>
+<Pane prefHeight="400.0" prefWidth="600.0" xmlns="http://javafx.com/javafx/8.0.171" xmlns:fx="http://javafx.com/fxml/1" fx:controller="ru.molokoin.MainFrameController">
+  <children>
+    <VBox prefHeight="200.0" prefWidth="300.0" >
+        <Label text="setup the port: "/>
+        <TextField fx:id="portField" promptText="8081" />
         <Button fx:id="btn" text="START" onAction="#buttonClicked"/>
     </VBox>
+  </children>
+</Pane>

target/classes/face/styles.css

@@ -0,0 +1,24 @@
+.Pane {
+  background-color:black;
+  -fx-background-color:black
+}
+.VBox {
+  background-color:black;
+  -fx-background-color:black
+}
+.children {
+  background-color:black;
+  -fx-background-color:black
+}
+.Button {
+  background-color:black;
+  -fx-background-color:black
+}
+.TextField {
+  background-color:black;
+  -fx-background-color:black
+}
+.Label {
+  background-color:black;
+  -fx-background-color:black
+}