JavaFX | LinearGradient Class

Last Updated : 19 Sep, 2018

LinearGradient class is a part of JavaFX. LinearGradient class fills a shape with a linear color gradient pattern. A user may specify more than one LinearGradient pattern and the system will provide interpolation between the colors.

Constructors of the class:

LinearGradient(double sX, double sY, double eX, double eY, boolean prop, CycleMethod c, List s): Creates a new Lineargradient object.
LinearGradient(double sX, double sY, double eX, double eY, boolean prop, CycleMethod c, Stop… s): Creates a new LinearGradient object.

Commonly Used Methods:

Method	Explanation
equals(Object o)	Returns whether the LinearGradient objects are equal or not.
getCycleMethod()	Returns the cycle method of the linear gradient object.
getEndX()	Returns the x coordinate of end point of the linear gradient.
getEndY()	Returns the y coordinate of end point of the linear gradient.
getStartX()	Returns the x coordinate of start point of the linear gradient.
getStartY()	Returns the y coordinate of start point of the linear gradient.
getStops()	Returns the stops of linear gradient.
isOpaque()	Returns whether the linear Gradient is opaque or not.
isProportional()	Returns whether the linear Gradient is proportional or not.
valueOf(String v)	Creates a linear gradient value from a string representation.

Below programs illustrate the use of LinearGradient Class:

Java program to create a LinearGradient object and add stops to it and apply it to the circle: In this program we will create an array of Stop objects with their offset values ranging from 0 to 1. Create a LinearGradient object with specified stops. Now create a circle with specified x, y positions, and radius and add the linear gradient to it. Then create a VBox and set the alignment of it. Add the circle to the vbox and add the vbox to the scene and add the scene to the stage and call the show() function to display the results.

   // Java program to create a LinearGradient  
// object and add stops to it and apply it 
// to the circle 
import javafx.application.Application; 
import javafx.scene.Scene; 
import javafx.scene.control.*; 
import javafx.scene.layout.*; 
import javafx.stage.Stage; 
import javafx.scene.layout.*; 
import javafx.scene.paint.*; 
import javafx.scene.text.*; 
import javafx.geometry.*; 
import javafx.scene.layout.*; 
import javafx.scene.shape.*; 
import javafx.scene.paint.*; 
   
public class Linear_Gradient_1 extends Application { 
   
// launch the application 
public void start(Stage stage) 
{ 
  
    try { 
  
        // set title for the stage 
        stage.setTitle("Linear Gradient"); 
  
        // create stops 
        Stop[] stop = {new Stop(0, Color.RED),  
                       new Stop(0.5, Color.GREEN),  
                       new Stop(1, Color.BLUE)}; 
  
        // create a Linear gradient object 
        LinearGradient linear_gradient = new LinearGradient(0, 0, 
                          1, 0, true, CycleMethod.NO_CYCLE, stop); 
  
        // create a circle 
        Circle circle = new Circle(100, 100, 70); 
  
        // set fill 
        circle.setFill(linear_gradient); 
  
        // create VBox 
        VBox vbox = new VBox(circle); 
  
        // ste Alignment 
        vbox.setAlignment(Pos.CENTER); 
  
        // create a scene 
        Scene scene = new Scene(vbox, 400, 300); 
  
        // set the scene 
        stage.setScene(scene); 
  
        stage.show(); 
    } 
  
    catch (Exception e) { 
  
        System.out.println(e.getMessage()); 
    } 
} 
  
// Main Method 
public static void main(String args[]) 
{ 
  
    // launch the application 
    launch(args); 
} 
} 
 
  

Output:

Java program to create a LinearGradient object and add stops to it and set the CycleMethod to reflect and set proportional to false and apply it to the circle: In this program we will create an array of Stop objects with their offset values ranging from 0 to 1. Then create a LinearGradient object with specified stops. Set the CycleMethod to reflect and set proportional to false. Create a circle with specified x, y positions, and radius and add the linear gradient to it. Then create a VBox and set the alignment of it. Add the circle to the vbox and add the vbox to the scene and add the scene to the stage and call the show() function to display the results.

   // Java program to create a LinearGradient object  
// and add stops to it and set the CycleMethod to 
// reflect and set proportional to false and  
// apply it to the circle 
import javafx.application.Application; 
import javafx.scene.Scene; 
import javafx.scene.control.*; 
import javafx.scene.layout.*; 
import javafx.stage.Stage; 
import javafx.scene.layout.*; 
import javafx.scene.paint.*; 
import javafx.scene.text.*; 
import javafx.geometry.*; 
import javafx.scene.layout.*; 
import javafx.scene.shape.*; 
import javafx.scene.paint.*; 
  
public class Linear_Gradient_2 extends Application { 
  
    // launch the application 
    public void start(Stage stage) 
    { 
  
        try { 
  
            // set title for the stage 
            stage.setTitle("Linear Gradient"); 
  
            // create stops 
            Stop[] stop = {new Stop(0, Color.RED), new Stop(0.5,  
                         Color.GREEN), new Stop(1, Color.BLUE)}; 
  
            // create a Linear gradient object 
            LinearGradient linear_gradient = new LinearGradient(0, 0,  
                            35, 0, false, CycleMethod.REFLECT, stop); 
  
            // create a circle 
            Circle circle = new Circle(100, 100, 70); 
  
            // set fill 
            circle.setFill(linear_gradient); 
  
            // create VBox 
            VBox vbox = new VBox(circle); 
  
            // ste Alignment 
            vbox.setAlignment(Pos.CENTER); 
  
            // create a scene 
            Scene scene = new Scene(vbox, 400, 300); 
  
            // set the scene 
            stage.setScene(scene); 
  
            stage.show(); 
        } 
  
        catch (Exception e) { 
  
            System.out.println(e.getMessage()); 
        } 
    } 
  
    // Main Method 
    public static void main(String args[]) 
    { 
  
        // launch the application 
        launch(args); 
    } 
} 
 
  