Develop graphical interface applications using the new JavaFX module in Java 13

Use the new JavaFX module in Java 13 to develop graphical interface applications

With the release of Java 13, the new JavaFX module has also been introduced, making it easier and easier to develop graphical interface applications. flexible. This article will introduce how to use the JavaFX module to develop a simple graphical interface application and provide some code examples.

Before you begin, please make sure you have installed the Java 13 JDK and configured the relevant environment variables correctly.

First of all, in Java 13, JavaFX was moved out of the JDK. Therefore, we need to download and install the JavaFX SDK separately. You can download the latest version of JavaFX SDK from the official website and extract it to a directory, such as C:javafx-sdk-13.

Next, we need to create a new Java project and configure the project's build path to introduce the JavaFX module.

Open your favorite integrated development environment (IDE) and create a new Java project. Here we take Eclipse as an example.

First, right-click the project name and select "Build Path" -> "Configure Build Path...". In the pop-up dialog box, select the "Libraries" tab and click the "Add Library" button under "Modulepath". Select "User Library" and click the "Next" button. In the next dialog box, click the "New" button to the right of "User Libraries", give the new user library a name (for example, "JavaFX 13"), and click "OK".

In the new user library dialog box, click the "Add External JARs..." button and select all jar files in the "lib" folder under the JavaFX SDK directory. Click "OK" and then "Finish".

Now, we have successfully added the JavaFX module to the project's build path. Next, let's write a simple JavaFX application.

First, create a new Java class and give it a suitable name, such as "MainApp".

In this class, we need to inherit the "Application" class and override its "start" method. This method will be called when the application starts, where we can create and initialize the graphical interface.

Here is a simple sample code:

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;

public class MainApp extends Application {

    @Override
    public void start(Stage primaryStage) {
        // 创建一个按钮
        Button btn = new Button();
        btn.setText("点击我");

        // 创建一个布局
        StackPane root = new StackPane();
        root.getChildren().add(btn);

        // 创建一个场景
        Scene scene = new Scene(root, 300, 250);

        // 设置主舞台的场景并显示
    primaryStage.setTitle("JavaFX Application");
        primaryStage.setScene(scene);
        primaryStage.show();
    }

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

In the above code, we create a button and a layout (using StackPane layout), and then add the button to the layout. Next, a scene was created and the layout was added to the scene. Finally, set the scene to the main stage and display the main stage.

Now, we have completed a simple JavaFX application. You can run it and see a window with a button. When the button is clicked, the action of the button can be triggered.

To summarize, it is very simple to develop graphical interface applications using the new JavaFX module in Java 13. Just download and install the JavaFX SDK and add it to your project's build path. You can then write a JavaFX application that creates and initializes graphical interface elements and displays them in a window.

I hope the code examples in this article will be helpful when you use the JavaFX module to develop graphical interface applications. Happy coding!

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