JavaFX ProgressBar

川长思鸟来 2023-10-15 14:23 42阅读 0赞

The *JavaFX ProgressBar* is a control capable of displaying the progress of some task. The progress is set as a `double` value between 0 and 1, where 0 means no progress and 1 means full progress (task completed). The *JavaFX* *ProgressBar* control is represented by the `javafx.scene.control.ProgressBar` class. Here is a screenshot of how a *JavaFX* *ProgressBar* looks:

![844a07258d44455eae47c921535cf81a.png][]

The `ProgressBar` in the above screenshot has its progress set to 0.5.

### JavaFX ProgressBar Example ###

Here is a full JavaFX `ProgressBar` code example

import javafx.application.Application;
    import javafx.scene.Scene;
    import javafx.scene.control.Hyperlink;
    import javafx.scene.control.ProgressBar;
    import javafx.scene.layout.VBox;
    import javafx.stage.Stage;
    
    public class ProgressBarExample extends Application {
        public static void main(String[] args) {
            launch(args);
        }
    
        @Override
        public void start(Stage primaryStage) {
            primaryStage.setTitle("JavaFX App");
    
            ProgressBar progressBar = new ProgressBar(0);
    
            progressBar.setProgress(0.5);
    
            VBox vBox = new VBox(progressBar);
            Scene scene = new Scene(vBox, 960, 600);
    
            primaryStage.setScene(scene);
            primaryStage.show();
        }
    
    }

### Create a ProgressBar ###

In order to use a JavaFX `ProgressBar` you must first create an instance of the `ProgressBar` class. Here is how you create an instance of a JavaFX `ProgressBar`:

ProgressBar progressBar = new ProgressBar();

This example creates a `ProgressBar` in indeterminate mode, meaning its progress level is not known. In indeterminate mode the JavaFX `ProgressBar` displays an animation.

You can create a `ProgressBar` instance with a determinate progress level by passing the progress value as parameter to its constructor, like this:

ProgressBar progressBar = new ProgressBar(0);

### Setting the Progress Level ###

You set the progress level of a `ProgressBar` via the `setProgress()` method. Here is an example of how you set the progress level of a JavaFX `ProgressBar`:

ProgressBar progressBar = new ProgressBar(0);
    
    progressBar.setProgress(0.5);

[844a07258d44455eae47c921535cf81a.png]: https://img-blog.csdnimg.cn/844a07258d44455eae47c921535cf81a.png