JavaFX | Reflection Class

Reflection class is a part of JavaFX. The Reflection class is used to add a reflected image below the actual image of the input value. The Reflected image will not respond to mouse events or the containment methods on the input.

Constructors of the class:

1. Reflection(): Creates a new Reflection Object.
2. Reflection(double topOffset, double fraction, double topOpacity, double bottomOpacity): Creates a new Reflection object with the specified topOffset, fraction, topOpacity and bottomOpacity.

Commonly Used Methods:

Method	Explanation
getBottomOpacity()	Returns the value of bottomOpacity
getTopOpacity()	Returns the value of topOpacity
getFraction()	Returns the fraction which the reflected image is of the real image
getTopOffset()	Returns the value of top offset
getInput()	Returns the value of property input
setBottomOpacity(double v)	Sets the value of bottomOpacity
setTopOpacity(double v)	Sets the value of topOpacity
setFraction(double v)	Sets the fraction which the reflected image is of the real image
setTopOffset(double v)	Sets the value of top offset
setInput(Effect v)	Sets the value of property input

Below programs illustrate the use of Reflection class:

1. Java program to add a reflection to the image using the reflection class: In this program a FileInputStream is created and an image is taken as input from a file. An Image named image is created using the input from the file input stream. From the image, an image view object is created and it is added to the VBox. The VBox is then added to the scene and the scene is added to the stage. A Reflection effect is created and the effect is set to the image view using setEffect() function.

   // Java program to add a reflection to
   // the image using the reflection class
   import javafx.application.Application;
   import javafx.scene.Scene;
   import javafx.scene.control.*;
   import javafx.scene.layout.*;
   import javafx.stage.Stage;
   import javafx.scene.image.*;
   import javafx.scene.effect.*;
   import java.io.*;
   import javafx.event.ActionEvent;
   import javafx.event.EventHandler;
   import javafx.scene.Group;
   
   public class reflection_1 extends Application {
   
       // launch the application
       public void start(Stage stage) throws Exception
       {
   
           // set title for the stage
           stage.setTitle("reflection example");
   
           // create a input stream
           FileInputStream input = new FileInputStream("D:\\GFG.png");
   
           // create a image
           Image image = new Image(input);
   
           // create a image View
           ImageView imageview = new ImageView(image);
   
           // create a reflection effect
           Reflection reflection = new Reflection();
   
           // set effect
           imageview.setEffect(reflection);
   
           // create a VBox
           VBox vbox = new VBox(imageview);
   
           // create a scene
           Scene scene = new Scene(vbox, 200, 200);
   
           // set the scene
           stage.setScene(scene);
   
           stage.show();
       }
   
       // Main Method
       public static void main(String args[])
       {
           // launch the application
           launch(args);
       }
   }

   Output:
   

2. Java program to add a reflection to the image using the reflection class and set the top offset, top opacity, bottom opacity and fraction of image which will appear as a reflection: In this program a FileInputStream is created and an image is taken as input from a file. Image named image is created using the input from the file input stream. From the image, an image view object is created and it is added to the VBox . The VBox is then added to the scene and the scene is added to the stage. A Reflection effect is created and the effect is set to the image view using setEffect() function. The bottom Opacity, top Opacity, top offset, and fraction are set using the setBottomOpacity(), setTopOpacity(), setFraction(), and setTopOffset() function respectively.

   // Java program to add a reflection to the image
   // using the reflection class and set the top
   // offset, top opacity bottom opacity and fraction
   // of image which will appear as reflection
   import javafx.application.Application;
   import javafx.scene.Scene;
   import javafx.scene.control.*;
   import javafx.scene.layout.*;
   import javafx.stage.Stage;
   import javafx.scene.image.*;
   import javafx.scene.effect.*;
   import java.io.*;
   import javafx.event.ActionEvent;
   import javafx.event.EventHandler;
   import javafx.scene.Group;
   
   public class reflection_2 extends Application {
   
       // launch the application
       public void start(Stage stage) throws Exception
       {
   
           // set title for the stage
           stage.setTitle("reflection example");
   
           // create a input stream
           FileInputStream input = new FileInputStream("D:\\GFG.png");
   
           // create a image
           Image image = new Image(input);
   
           // create a image View
           ImageView imageview = new ImageView(image);
   
           // create a reflection effect
           Reflection reflection = new Reflection();
   
           // set fraction
           reflection.setFraction(0.6);
   
           // set top Opacity
           reflection.setTopOpacity(0.3);
   
           // set bottom Opacity
           reflection.setBottomOpacity(0.1);
   
           // set top offset
           reflection.setTopOffset(0.5);
   
           // set effect
           imageview.setEffect(reflection);
   
           // create a VBox
           VBox vbox = new VBox(imageview);
   
           // create a scene
           Scene scene = new Scene(vbox, 200, 200);
   
           // set the scene
           stage.setScene(scene);
   
           stage.show();
       }
   
       // Main Method
       public static void main(String args[])
       {
   
           // launch the application
           launch(args);
       }
   }

   Output:

   

Note: The above programs might not run in an online IDE. Please use an offline compiler.

Reference: https://docs.oracle.com/javase/8/javafx/api/javafx/scene/effect/Reflection.html