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我正在开发一个 Yahtzee 游戏，只是为了提高我的编程技能，我似乎无法让所有标签和单选按钮出现在 HBox 中。以下是所有相关代码：

public class Main extends Application{

Label diceRoll1 = new Label("1");
Label diceRoll2 = new Label("2");
Label diceRoll3 = new Label("3");
Label diceRoll4 = new Label("4");
Label diceRoll5 = new Label("5");

RadioButton holdRButton1 = new RadioButton("Hold");
RadioButton holdRButton2 = new RadioButton("Hold");
RadioButton holdRButton3 = new RadioButton("Hold");
RadioButton holdRButton4 = new RadioButton("Hold");
RadioButton holdRButton5 = new RadioButton("Hold");

Button rollDice = new Button("Roll!");

Stage window;

public static void main(String[] args) {
    launch(args);
}

@Override
public void start(Stage primaryStage)throws Exception{
    VBox diceRoll1Layout = new VBox(5);
    diceRoll1Layout.getChildren().addAll(diceRoll1, holdRButton1);

    VBox diceRoll2Layout = new VBox(5);
    diceRoll2Layout.getChildren().addAll(diceRoll2, holdRButton2);

    VBox diceRoll3Layout = new VBox(5);
    diceRoll3Layout.getChildren().addAll(diceRoll3, holdRButton3);

    VBox diceRoll4Layout = new VBox(5);
    diceRoll4Layout.getChildren().addAll(diceRoll4, holdRButton4);

    VBox diceRoll5Layout = new VBox(5);
    diceRoll5Layout.getChildren().addAll(diceRoll5, holdRButton5);

    HBox diceRolls = new HBox(5);
    diceRolls.getChildren().addAll(diceRoll1Layout,diceRoll2Layout,diceRoll3Layout,
            diceRoll4Layout,diceRoll5Layout, rollDice);

    BorderPane rootPane = new BorderPane();
    rootPane.setBottom(diceRolls);

    Scene scene = new Scene(rootPane, 400, 500);
    window = primaryStage;
    window.setTitle("Yahtzee!");
    window.setScene(scene);
    window.show();

}
}

但由于某种原因，每当我运行代码时，窗口中只会出现 diceRoll1、diceRoll2、holdRButton1、holdRButton2 和 rollDice。它们的编码都相同，所以我不知道为什么它们没有全部出现。我尝试将它们设置为可见，但没有任何区别。我错过了什么吗？

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