java JavaFX | Bloom 类

JavaFX | Bloom 类

原文:https://www.geeksforgeeks.org/javafx-bloom-class/

Bloom 类是 JavaFX 的一部分。布隆是一种高级效果，根据可配置的阈值，它使输入图像的较亮部分看起来发光。绽放类继承效果类。

类的构造函数:

绽放():创建一个新的绽放对象。
绽放(双 t) :用指定的阈值创建新的绽放效果。

常用方法:

方法	说明
getInput()	获取属性输入的值
getThreshold()	返回阈值的值
设置输入(效果五)	设置属性输入的值
设置阈值(双 v)	设置效果的阈值

下面的程序说明了布鲁姆类的使用:

Java program to import an image and add bloom effect to it: 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 Bloom effect is created with a specified level passed as parameters and the effect is set to the image view using setEffect() function.

```java // Java program to import an image // and add bloom effect to it 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 bloom_1 extends Application {

// launch the application     public void start(Stage stage) throws Exception     {

// set title for the stage         stage.setTitle("Bloom 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 bloom effect         Bloom bloom = new Bloom(0.9);

// set effect         imageview.setEffect(bloom);

// 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);     } } ```

输入图像:

输出:
Java program to import an image and set bloom effect to it, the Threshold value of the bloom effect can be controlled using a button: In this program an 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 Bloom effect is created with a specified level passed as parameters and the effect is set to the image view using setEffect() function. A Button named button is created which is used to increase the bloom of the image. The button is also added to the VBox. The bloom of the image is increased using the setThreshold() function. The events related to button is handled using EventHandler.

```java // Java program to import an image and // set bloom effect to it. The Threshold // value of the bloom effect can be // controlled using the button 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 bloom_2 extends Application {

double level = 0.1;

// launch the application     public void start(Stage stage) throws Exception     {

// set title for the stage         stage.setTitle("Bloom 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 bloom effect         Bloom bloom = new Bloom(level);

// create a button         Button button = new Button("bloom");

// action event         EventHandler event = new EventHandler() {

public void handle(ActionEvent e)             {

// increase the level                 level += 0.1;                 if (level > 1)                     level = 0.0;

// set Level for bloom                 bloom.setThreshold(level);             }         };

// set on action of button         button.setOnAction(event);

// set effect         imageview.setEffect(bloom);

// create a VBox         VBox vbox = new VBox(imageview, button);

// 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);     } } ```

输入图像:

输出:

https://media.geeksforgeeks.org/wp-content/uploads/Bloom_2.mp4