我正在尝试在javafx中创建一个掷骰子的GUI。程序应该显示带按钮的骰子，当点击按钮时，它应该改变相应随机数的图像。我不知道如何让我的按钮工作。下面是我写的代码和我的Die类：
public class Die {
protected int sideShowing;
public Die() {
}
public void roll() {
sideShowing = (int)(Math.random()*6) + 1;
}
public int getValue() {
return sideShowing;
}
@Override
public String toString(){
switch(sideShowing){
case 1: return "One";
case 2: return "Two";
case 3: return "Three";
case 4: return "Four";
case 5: return "Five";
case 6: return "Six";
default: return "No side";
}
}
@Override
public boolean equals(Object o){
if(o instanceof Die){
return this.getValue() == ((Die)o).getValue();
}else{
return false;
}
}
}
import javafx.application.Application;
import javafx.stage.Stage;
import javafx.scene.Scene;
import javafx.scene.layout.StackPane;
import javafx.scene.shape.Rectangle;
import javafx.scene.paint.Color;
import javafx.scene.image.ImageView;
import javafx.scene.image.Image;
import javafx.scene.text.Text;
import javafx.geometry.Pos;
import javafx.scene.layout.VBox;
import javafx.scene.control.Button;
import javafx.scene.control.TextField;
import javafx.scene.layout.FlowPane;
import javafx.scene.control.ComboBox;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
public class DiceRoll extends Application{
//add the start method
@Override
public void start(Stage primaryStage){
Rectangle r1 = new Rectangle(300, 200);
r1.setFill(Color.WHITE);
Die die1 = new Die();
Die die2 = new Die();
die1.getValue();
die2.getValue();
Image image = new Image("Dice1.png");
ImageView Dice1 = new ImageView(image);
Dice1.setFitHeight(50);
Dice1.setFitWidth(50);
Image image2 = new Image("Dice2.png");
ImageView Dice2 = new ImageView(image2);
Dice2.setFitHeight(50);
Dice2.setFitWidth(50);
Image image3 = new Image("Dice3.png");
ImageView Dice3 = new ImageView(image3);
Dice3.setFitHeight(50);
Dice3.setFitWidth(50);
Image image4 = new Image("Dice4.png");
ImageView Dice4 = new ImageView(image4);
Dice4.setFitHeight(50);
Dice4.setFitWidth(50);
Image image5 = new Image("Dice5.png");
ImageView Dice5 = new ImageView(image5);
Dice5.setFitHeight(50);
Dice5.setFitWidth(50);
Image image6 = new Image("Dice6.png");
ImageView Dice6 = new ImageView(image6);
Dice6.setFitHeight(50);
Dice6.setFitWidth(50);
VBox vBox = new VBox(50);
vBox.setAlignment(Pos.BASELINE_LEFT);
Button btn = new Button();
btn.setText("Roll Die!");
btn.setOnAction(new EventHandler<ActionEvent>() {
@Override
public void handle(ActionEvent event) {
if(die1.toString() == "one"){
vBox.getChildren().add(Dice1);
}
else if(die1.toString() == "two"){
vBox.getChildren().add(Dice2);
}
else if(die1.toString() == "three"){
vBox.getChildren().add(Dice3);
}
else if(die1.toString() == "four"){
vBox.getChildren().add(Dice4);
}
else if(die1.toString() == "five"){
vBox.getChildren().add(Dice5);
}
else if(die1.toString() == "six"){
vBox.getChildren().add(Dice6);
}
}
});
StackPane sPane = new StackPane();
sPane.getChildren().add(vBox);
VBox vBox2 = new VBox(50);
vBox2.setAlignment(Pos.BOTTOM_CENTER);
vBox2.getChildren().add(sPane); //Dice
StackPane sPane2 = new StackPane();
sPane2.getChildren().add(r1);
sPane2.getChildren().add(sPane);
sPane2.getChildren().add(vBox2);
VBox vBox3 = new VBox(20);
vBox3.setAlignment(Pos.BOTTOM_RIGHT);
vBox3.getChildren().addAll(btn);
FlowPane fPane = new FlowPane(20, 20);
fPane.getChildren().addAll(vBox, sPane2, vBox3);
Scene scene = new Scene(fPane, 300, 400);
primaryStage.setTitle("JavaFX Example");
primaryStage.setScene(scene);
primaryStage.show();
}
public static void main(String[] args){
Application.launch(args);
}
}
非常感谢任何帮助或建议，谢谢。