如何在javafx中单击它们时为图片添加说明。

Question

这是我到目前为止所得到的

package photo.album;
import javafx.application.Application;
import static javafx.application.Application.launch;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.event.EventType;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.ContentDisplay;
import javafx.scene.control.Label;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.HBox;
import javafx.scene.layout.StackPane;
import javafx.scene.paint.Color;
import javafx.stage.Stage;

/**
 *
 * enter code here
 */
public class PhotoAlbum extends Application {

    Button btnTree, btnFwheel, btnAlley, btnFrog, btnPic, btnRemove;
        ImageView imgpic;
        HBox btnbox;


    @Override
    public void start(Stage primaryStage) {


        btnTree = new Button("Palmetto Tree");
        btnFwheel = new Button("Ferris Wheel");
        btnAlley = new Button("Alley Way");
        btnFrog = new Button("Little Frog");
        btnPic = new Button("Picture");
        btnRemove = new Button("Remove");

        btnTree.setOnAction(e->handleButtonAction(e));
        btnFwheel.setOnAction(e->handleButtonAction(e));
        btnAlley.setOnAction(e->handleButtonAction(e));
        btnFrog.setOnAction(e->handleButtonAction(e));
        btnPic.setOnAction(e->handleButtonAction(e));
        btnRemove.setOnAction(e->handleButtonAction(e));


        //put top 5 buttons in a box
        btnbox = new HBox(btnTree, btnFwheel, btnAlley, btnFrog, btnPic);
        btnbox.setSpacing(10);
        btnbox.setPadding(new Insets(20));
        // make the image
        imgpic = new ImageView();

        //create the BorderPane
        BorderPane root = new BorderPane();
        root.setPadding(new Insets(10));

        root.setTop(btnbox);
        root.setCenter(imgpic);
        root.setBottom(btnRemove);

        //center the button in the bottom region
        BorderPane.setAlignment(btnRemove, Pos.CENTER);

        Scene scene = new Scene(root, 700, 800);

        primaryStage.setTitle("Photo Album");
        primaryStage.setScene(scene);
        primaryStage.show();


    }

    private void handleButtonAction(ActionEvent event) {
        Image img;
        if(event.getSource() == btnTree)
           img = new Image("file:///../image/Tree.jpg");


        else if(event.getSource() == btnFwheel)
           img = new Image("file:///../image/Fwheel.png");


        else if(event.getSource() == btnAlley)
           img = new Image("file:///../image/Alley.jpg");


        else if(event.getSource() == btnFrog)
           img = new Image("file:///../image/Frog.png");

        else if(event.getSource() == btnPic)
           img = new Image("file:///../image/Pic.jpg");


        else
           img = null;
        imgpic.setImage(img);

    }


    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        launch(args);
    }

我似乎无法做到正确。我只是希望能够在点击它们时显示有关照片的说明。如果有人能带领我朝着正确的方向前进，我将非常感激。