How to draw geometric 2D shapes in JavaFX?

Generally speaking, 2D shapes are geometric figures that can be drawn on the XY plane, including lines, rectangles, circles, etc.

javafx.scene.shapeThe package provides various classes, each class represents/defines a 2D geometric object or an operation on them. The class named Shape is the base class for all 2D shapes in JavaFX.

Creating 2D Shapes

To draw 2D geometric shapes using JavaFX, you need:

• Instancing Class - Instantiation corresponding class. For example, if you want to draw a circle, you need to instantiate the Circle class as follows:

//Drawing a Circle
Circle circle = new Circle();

• Set the properties - Use its corresponding Class methods set the shape's properties. For example, to draw a circle, you need a center and a radius, which you can set using the setCenterX(), setCenterY(), and setRadius() methods respectively.

//Setting the properties of the circle
circle.setCenterX(300.0f);
circle.setCenterY(135.0f);
circle.setRadius(100.0f);

• Add the shape object to the group − Finally, pass the created shape as a parameter to the group’s constructor as follows Display:

Group root = new Group(circle);

Example

import javafx.application.Application;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.stage.Stage;
import javafx.scene.shape.Circle;
public class CircleExample extends Application {
   public void start(Stage stage) {
      //Drawing a Circle
      Circle circle = new Circle();
      //Setting the properties of the circle
      circle.setCenterX(300.0f);
      circle.setCenterY(135.0f);
      circle.setRadius(100.0f);
      //Creating a Group object
      Group root = new Group(circle);
      //Creating a scene object
      Scene scene = new Scene(root, 600, 300);
      //Setting title to the Stage
      stage.setTitle("Drawing a Circle");
      //Adding scene to the stage
      stage.setScene(scene);
      //Displaying the contents of the stage
      stage.show();
   }
   public static void main(String args[]){
      launch(args);
   }
}

Output

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