sample.fxml

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

<?import javafx.scene.control.Button?>
<?import javafx.scene.control.ScrollPane?>
<?import javafx.scene.control.TextArea?>
<?import javafx.scene.layout.AnchorPane?>
<?import javafx.scene.text.Text?>

<AnchorPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="498.0" prefWidth="700.0" xmlns="http://javafx.com/javafx/11.0.1" xmlns:fx="http://javafx.com/fxml/1">
   <children>
      <Button id="submitButton" layoutX="100.0" layoutY="423.0" mnemonicParsing="false" prefHeight="35.0" prefWidth="129.0" text="Submit thought" />
      <TextArea id="textBox" layoutX="59.0" layoutY="299.0" prefHeight="106.0" prefWidth="307.0" promptText="Write your thought here..." />
      <Text layoutX="65.0" layoutY="31.0" strokeType="OUTSIDE" strokeWidth="0.0" text="Your thoughts" />
      <ScrollPane layoutX="1.0" layoutY="40.0" prefHeight="258.0" prefWidth="700.0">
         <content>
            <Text id="thoughtId" strokeType="OUTSIDE" strokeWidth="0.0" text="Text" wrappingWidth="33.22460746765137" />
         </content>
      </ScrollPane>
   </children>
</AnchorPane>