sample.fxml

package sample;

import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import javafx.scene.SubScene;
import javafx.scene.control.TabPane;
import javafx.scene.input.MouseEvent;

import java.net.URL;
import java.util.ResourceBundle;


public class Controller implements Initializable {
<?xml version="1.0" encoding="UTF-8"?>

<?import javafx.scene.SubScene?>
<?import javafx.scene.control.Tab?>
<?import javafx.scene.control.TabPane?>
<?import javafx.scene.effect.DropShadow?>
<?import javafx.scene.layout.ColumnConstraints?>
<?import javafx.scene.layout.GridPane?>
<?import javafx.scene.layout.Pane?>
<?import javafx.scene.layout.Region?>
<?import javafx.scene.layout.RowConstraints?>

<GridPane alignment="center" hgap="10" vgap="10" xmlns="http://javafx.com/javafx/8.0.172-ea" xmlns:fx="http://javafx.com/fxml/1" fx:controller="sample.Controller">
   <columnConstraints>
      <ColumnConstraints />
   </columnConstraints>
   <rowConstraints>
      <RowConstraints />
   </rowConstraints>
   <children>
      <Pane prefHeight="354.0" prefWidth="415.0">
         <children>
            <TabPane id="TabPane1" fx:id="TabPane1" layoutX="-14.0" prefHeight="354.0" prefWidth="430.0" tabClosingPolicy="UNAVAILABLE">
              <tabs>
                <Tab text="Untitled Tab 1">
                     <content>
                        <SubScene id="SubScene1" fx:id="SubScene1" fill="#c62525" height="200.0" width="200.0">
                          <root>
                            <Region />
                          </root>
                           <effect>
                              <DropShadow />
                           </effect>
                        </SubScene>
                     </content>
                  </Tab>
                <Tab text="Untitled Tab 2" />
              </tabs>
            </TabPane>
         </children>
      </Pane>
   </children>
</GridPane>