Use the new JavaFX threading model in Java 13 to implement asynchronous updates of the UI interface

Use the new JavaFX threading model in Java 13 to implement asynchronous updates of the UI interface

Introduction:
In software development, the response speed of the user interface is very important for the user experience. . In order to ensure the smoothness and timeliness of the interface, developers need to use an asynchronous way to update the user interface. In previous versions, JavaFX used the JavaFX Application Thread to update the UI interface, but the "UI suspended animation" phenomenon was prone to occur in a concurrent environment. To solve this problem, Java 13 introduced the new JavaFX threading model.

1. Introduction to the new JavaFX thread model
   JavaFX 13 introduced Fiber thread (Fiber Thread) as the rendering thread of the UI interface. Compared with previous JavaFX application threads, Fiber threads use fibers to implement task switching and execution. Fiber is a lightweight execution process that can effectively manage and switch tasks and improve concurrency performance.
2. Using the JavaFX thread model for asynchronous updates of the UI interface
   Below we use a sample program to demonstrate how to use the JavaFX thread model to implement asynchronous updates of the UI interface.

import javafx.application.Application;
import javafx.concurrent.Task;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;

public class AsyncUIUpdateExample extends Application {

    private Label countLabel;

    @Override
    public void start(Stage primaryStage) {
        countLabel = new Label("0");

        Button startButton = new Button("Start");
        startButton.setOnAction(event -> startAsyncTask());

        VBox root = new VBox(countLabel, startButton);
        Scene scene = new Scene(root, 200, 100);

        primaryStage.setTitle("Async UI Update Example");
        primaryStage.setScene(scene);
        primaryStage.show();
    }

    private void startAsyncTask() {
        Task<Void> task = new Task<Void>() {
            @Override
            protected Void call() throws Exception {
                // 模拟耗时的任务
                for (int i = 0; i < 10; i++) {
                    Thread.sleep(1000);
                    int count = i + 1;

                    // 使用Platform.runLater()方法来在JavaFX线程中更新UI界面
                    javafx.application.Platform.runLater(() -> {
                        countLabel.setText(String.valueOf(count));
                    });
                }
                return null;
            }
        };

        new Thread(task).start();
    }

    public static void main(String[] args) {
        launch(args);
    }
}

In the above example, we created a basic JavaFX application containing a Label to display the count and a button to start an asynchronous task. When the button is clicked, a new Task object is created to simulate a time-consuming task, and the Platform.runLater() method is used to update the count value of the UI interface in the JavaFX thread. By updating the UI interface in the JavaFX thread, we can ensure the smoothness of the UI interface and avoid the "UI suspended animation" phenomenon.

Conclusion:
The new JavaFX threading model in Java 13 provides a more efficient and reliable way to implement asynchronous updates of the UI interface. By using fibers to manage and switch tasks, developers can better control and optimize the responsiveness of their interfaces. Using the code in the above example can help developers better understand and use the JavaFX threading model to implement asynchronous updates of the UI interface.

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