MainScene.fxml

<?xml version="1.0" encoding="UTF-8"?>

<?import javafx.scene.control.Button?>
<?import javafx.scene.control.ListView?>
<?import javafx.scene.layout.Pane?>

<Pane fx:id="backgroundPane" maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="524.0" prefWidth="759.0" xmlns="http://javafx.com/javafx/8.0.45" xmlns:fx="http://javafx.com/fxml/1" fx:controller="MainSceneController">

   <children>

      <Button fx:id="exitButton" layoutX="582.0" layoutY="22.0" onMouseClicked="#exitClicked" prefHeight="52.0" prefWidth="151.0" text="Exit" />
      
      <ListView fx:id="listView" layoutX="28.0" layoutY="22.0" onKeyPressed="#listViewClicked" onMouseClicked="#listViewClicked" prefHeight="393.0" prefWidth="527.0" />

   </children>

</Pane>