JavaFX：控制形状的层叠顺序以实现视觉效果

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.layout.Pane;
import javafx.scene.paint.Color;
import javafx.scene.shape.Rectangle;
import javafx.stage.Stage;

public class ViewOrderExample extends Application {

    @Override
    public void start(Stage primaryStage) {
        Pane root = new Pane();

        Rectangle rect1 = new Rectangle(50, 50, 100, 100);
        rect1.setFill(Color.BLUE);

        Rectangle rect2 = new Rectangle(75, 75, 100, 100);
        rect2.setFill(Color.RED);

        root.getChildren().addAll(rect1, rect2);

        // 将红色矩形置于蓝色矩形之上
        rect2.setViewOrder(-1); // 较小的viewOrder值意味着更靠前

        Scene scene = new Scene(root, 300, 300);
        primaryStage.setScene(scene);
        primaryStage.setTitle("View Order Example");
        primaryStage.show();
    }

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

public void snakeDead(){
    getHead().shape.setFill(RED);
    getHead().shape.setViewOrder(-1); // 确保蛇头在最前面
}