Javafx中带有画布的DrawCircle（GraphicsContext gc）

Question

我必须在JavaFX中做一些用画布绘制正多边形的项目，我对如何使用GraphicsContext用画布设计一个圆有疑问

public class Point2D {

         private float mX;
         private float mY;

         public Point2D () {
            this (0,0);
         }

         public Point2D (float x, float y) {
             mX = x;
             mY = y;
         }

        public float getX() {
           return mX;
          }

       public float getY() {
          return mY;
  }
}

public class Circle{

    private Point2D mCenter;
    private Color color;
    private float mRadius;

public Circle (Point2D center, Color color, float radius ) {
         this.mCenter = center;
         this.color = color;
         this.mRadius = radius;
     }

public void drawCircle(GraphicsContext gc) { // My Doubt is here
        Canvas canvas = new Canvas();
        gc = canvas .getGraphicsContext2D();
        gc.setFill(Color.WHITE);
        gc.setStroke(Color.BLACK);

    } 
}

在主JavaFX中

public class PaintGeometricoFX extends Application {

private BorderPane root;

 @Override
    public void start(Stage primaryStage) {

         Point2D p = new Point2D(0, 0);
         Float radius = 4.0f;

         Circle circle = new Circle(p.getX(), p.getY(),Color.BLACK,radius)

         Canvas canvas = new Canvas();
         GraphicsContext gc = imagem.getGraphicsContext2D();

         circle.drawCircle(gc);

          root.setCenter(canvas);


        Scene scene = new Scene(root, 1152, 800);

        primaryStage.setTitle("PAINT");
        primaryStage.setResizable(false);
        primaryStage.setScene(scene);
        primaryStage.show();

    }

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

Answer 1

抚摸：

getGraphicsContext2D().strokeOval(center.x-radius, center.y-radius, radius, radius);

填充：

getGraphicsContext2D().fillOval(center.x-radius, center.y-radius, radius, radius);