JavaFX - Scaling Transformation

To change the size of an object, scaling transformation is used. In the scaling process, you either expand or compress the dimensions of the object. Scaling can be achieved by multiplying the original coordinates of the object with the scaling factor to get the desired result.

Example

Following is the program which demonstrates scaling in JavaFX. Here, we are creating 2 circles (nodes) at the same location with the same dimensions, but with different colors (Blurywood and Blue). We are also applying scaling transformation on the circle with a blue color.

Save this code in a file with the name ScalingExample.java.

import javafx.application.Application; 
import javafx.scene.Group; 
import javafx.scene.Scene; 
import javafx.scene.paint.Color; 
import javafx.scene.shape.Circle; 
import javafx.scene.transform.Scale; 
import javafx.stage.Stage; 
         
public class ScalingExample extends Application {  
   @Override 
   public void start(Stage stage) {      
      //Drawing Circle1 
      Circle circle1 = new Circle(300, 135, 50);   
      
      //Setting the color of the circle 
      circle1.setFill(Color.BLUE);        
      
      //Setting the stroke width of the circle 
      circle1.setStrokeWidth(20);       
       
      //Drawing Circle2 
      Circle circle2 = new Circle(300, 135, 50); 
      
      //Setting the color of the circle 
      circle2.setFill(Color.BURLYWOOD); 
      
      //Setting the stroke width of the circle 
      circle2.setStrokeWidth(20);
      
      //Creating the scale transformation 
      Scale scale = new Scale(); 
      
      //Setting the dimensions for the transformation 
      scale.setX(1.5); 
      scale.setY(1.5); 
      
      //Setting the pivot point for the transformation 
      scale.setPivotX(300); 
      scale.setPivotY(135); 
       
      //Adding the scale transformation to circle1 
      circle1.getTransforms().addAll(scale); 
         
      //Creating a Group object  
      Group root = new Group(circle1, circle2); 
         
      //Creating a scene object 
      Scene scene = new Scene(root, 600, 300);  
      
      //Setting title to the Stage 
      stage.setTitle("Scaling transformation 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 ScalingExample.java 
java ScalingExample

On executing, the above program generates a JavaFX window as shown below.