JavaFX | LinearGradient Class

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:

  1. LinearGradient(double sX, double sY, double eX, double eY, boolean prop, CycleMethod c, List s): Creates a new Lineargradient object.
  2. 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:

  1. 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.
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    // 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);
    }
    }

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    Output:

  2. 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.
    filter_none

    edit
    close

    play_arrow

    link
    brightness_4
    code

    // 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);
        }
    }

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    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/paint/LinearGradient.html



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