在javafx中尝试制作不同颜色的圆圈

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

public class ColoredCircles extends Application {

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

        // 创建一个红色的圆圈
        Circle redCircle = new Circle(50, Color.RED);
        redCircle.setCenterX(100);
        redCircle.setCenterY(100);
        redCircle.setRadius(50);

        // 创建一个蓝色的圆圈
        Circle blueCircle = new Circle(50, Color.BLUE);
        blueCircle.setCenterX(250);
        blueCircle.setCenterY(100);
        blueCircle.setRadius(50);

        // 创建一个绿色的圆圈
        Circle greenCircle = new Circle(50, Color.GREEN);
        greenCircle.setCenterX(100);
        greenCircle.setCenterY(250);
        greenCircle.setRadius(50);

        // 将圆圈添加到布局中
        root.getChildren().addAll(redCircle, blueCircle, greenCircle);

        // 创建场景并显示
        Scene scene = new Scene(root, 400, 400);
        primaryStage.setTitle("Colored Circles Example");
        primaryStage.setScene(scene);
        primaryStage.show();
    }

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