How to draw a geometrical 2D shape in JavaFX?

In general, a 2D shape is a geometrical figure that can be drawn on the XY plane, these include Line, Rectangle, Circle, etc.

The javafx.scene.shape package provides you, various classes, each of them represents/defines a 2d geometrical object or, an operation on them. The class named Shape is the base class of all the 2-Dimensional shapes in JavaFX.

Creating 2D shapes

To draw a 2D geometrical shape using JavaFX you need to −

• Instantiate the class − Instantiate the respective class. For example, if you want to draw a circle you need to instantiate the Circle class as shown below −

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

• Set the properties − Set properties of the shape using the method of its respective class. For example, To draw a circle you need the center and radius and you can set them 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 shape created as a parameter to the group constructor as −

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