Write a program that displays a text file in a text area. The user enters a file name in a text field and clicks the View button; the file is then displayed in a text area of a scrollPane.

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public class Exercise17_4 extends Application{

    public void start(Stage primaryStage) throws Exception {
       DescriptionPane descriptionPane = new DescriptionPane();
       Scene scene = new Scene(descriptionPane, 330, 200);
       primaryStage.setTitle("Exercise17_4"); // Set the stage title
       primaryStage.setScene(scene); // Place the scene in the stage; // Display the stage

class DescriptionPane extends BorderPane{
    private ScrollPane scrollPane;
    private HBox bottom;
    private TextField input;
    private Button button;
    private Label label;
    private TextArea area;
    public DescriptionPane() {
       area = new TextArea();...
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