在 JavaFX 中显示字符串/标签

我需要帮助弄清楚如何在程序中显示文本，以便它可以在我创建的多边形形状的中间显示“停止”。我想做的是创建一个停车标志。我已经负责创建和显示该停止标志，所以现在我只需要在 t 中显示“停止”

package application;
public class Main extends Application {
@Override
public void start(Stage primaryStage) {
    Pane pane = new Pane();
    Polygon polygon = new Polygon();
    pane.getChildren().add(polygon);
    polygon.setFill(javafx.scene.paint.Color.RED); //sets the color of polygon
    ObservableList<Double> list = polygon.getPoints();

    //create a label to display in the middle of the "stop sign" polygon shape
    //This is what I need most help on
    Label sign = new Label("Stop"); 
    sign.setAlignment(Pos.CENTER);
    System.out.print(sign);

    final double WIDTH = 200, HEIGHT = 200;
    double centerX = WIDTH / 2, centerY = HEIGHT / 2;
    double radius = Math.min(WIDTH, HEIGHT) * 0.4;

    // Add points to the polygon list
    for (int i = 0; i < 6; i++){
        list.add(centerX + radius * Math.cos(2 * i * Math.PI / 6));
        list.add(centerY - radius * Math.sin(2 * i * Math.PI / 6));
    }

    // Create a scene and place it in the stage
    Scene scene = new Scene(pane, WIDTH, HEIGHT);
    primaryStage.setTitle("ShowPolygon"); //Set the stage title 
    primaryStage.setScene(scene); //Place the scene in the stage
    primaryStage.show(); //Display the stage



}

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

}

更换Pane with StackPane并添加sign到它（在多边形之后）：

public void start(Stage primaryStage) {
    StackPane pane = new StackPane();
    Polygon polygon = new Polygon();
    polygon.setFill(javafx.scene.paint.Color.RED); //sets the color of polygon
    ObservableList<Double> list = polygon.getPoints();

    //create a label to display in the middle of the "stop sign" polygon shape
    //This is what I need most help on
    Label sign = new Label("STOP");
    //sign.setStyle("-fx-text-fill: white; -fx-font-size: 3em");
    sign.setAlignment(Pos.CENTER);
    System.out.print(sign);


    pane.getChildren().add(polygon);
    pane.getChildren().add(sign);

    final double WIDTH = 200, HEIGHT = 200;
    double centerX = WIDTH / 2, centerY = HEIGHT / 2;
    double radius = Math.min(WIDTH, HEIGHT) * 0.4;

    // Add points to the polygon list
    for (int i = 0; i < 6; i++) {
        list.add(centerX + radius * Math.cos(2 * i * Math.PI / 6));
        list.add(centerY - radius * Math.sin(2 * i * Math.PI / 6));
    }

    // Create a scene and place it in the stage
    Scene scene = new Scene(pane, WIDTH, HEIGHT);
    primaryStage.setTitle("ShowPolygon"); //Set the stage title
    primaryStage.setScene(scene); //Place the scene in the stage
    primaryStage.show(); //Display the stage


}

Javadoc 关于StackPane:

StackPane 将其子级布置在从后到前的堆栈中。 z 顺序 子项的数量由子项列表的顺序定义 第 0 个孩子位于底部，最后一个孩子位于顶部。如果边界和/或 填充已设置，子项将放置在这些填充中 插图。

堆栈窗格将尝试调整每个子项的大小以填充其内容 区域。如果无法调整子级的大小以填充堆栈窗格（或者 因为它无法调整大小或其最大尺寸阻止了它）然后它 将使用对齐属性在区域内对齐，其中 默认为 Pos.CENTER。