2D Shapes(Objects) Subtraction Operation


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This operation takes two or more shapes as an input. Then, it returns the area of the first shape excluding the area overlapped by the second one as shown below.

Subtraction Operation

You can perform the Subtraction Operation on the shapes using the method named subtract(). Since this is a static method, you should call it using the class name (Shape or its subclasses) as shown below.

Shape shape = Shape.subtract(circle1, circle2);  

Following is an example of the Subtraction Operation. In here, we are drawing two circles and performing a subtraction operation on them.

Save this code in a file with name SubtractionExample.java.

Example

import javafx.application.Application; 
import javafx.scene.Group; 
import javafx.scene.Scene; 
import javafx.scene.paint.Color; 
import javafx.stage.Stage; 
import javafx.scene.shape.Circle; 
import javafx.scene.shape.Shape; 
         
public class SubtractionExample extends Application { 
   @Override 
   public void start(Stage stage) {
      //Drawing Circle1 
      Circle circle1 = new Circle();         
      
      //Setting the position of the circle 
      circle1.setCenterX(250.0f); 
      circle1.setCenterY(135.0f); 
      
      //Setting the radius of the circle 
      circle1.setRadius(100.0f); 
      
      //Setting the color of the circle 
      circle1.setFill(Color.DARKSLATEBLUE);     
       
      //Drawing Circle2 
      Circle circle2 = new Circle();         
      
      //Setting the position of the circle 
      circle2.setCenterX(350.0f); 
      circle2.setCenterY(135.0f); 
      
      //Setting the radius of the circle 
      circle2.setRadius(100.0f); 
      
      //Setting the color of the circle 
      circle2.setFill(Color.BLUE);  
       
      //Performing subtraction operation on the circle 
      Shape shape = Shape.subtract(circle1, circle2); 
      
      //Setting the fill color to the result 
      shape.setFill(Color.DARKSLATEBLUE); 
       
      //Creating a Group object  
      Group root = new Group(shape); 
         
      //Creating a scene object 
      Scene scene = new Scene(root, 600, 300);  
      
      //Setting title to the Stage 
      stage.setTitle("Subtraction Example");
      
      //Adding scene to the stage 
      stage.setScene(scene); 
         
      //Displaying the contents of the stage 
      stage.show(); 
   } 
   public static void main(String args[]){ 
      launch(args); 
   } 
}       

Compile and execute the saved java file from the command prompt using the following commands.

javac SubtractionExample.java 
java SubtractionExample

On executing, the above program generates a JavaFX window displaying the following output −

Subtraction Operation Output
javafx_2d_shapes.htm

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