java如何调用js

<code>import javafx.scene.web.WebView;
import javafx.application.Application;

public class JavaFXWebView extends Application {
    public static void main(String[] args) {
        launch(args);
    }

    @Override
    public void start(Stage primaryStage) throws Exception {
        WebView webView = new WebView();
        WebEngine webEngine = webView.getEngine();
        webEngine.load("index.html");
        webEngine.executeScript("alert('Hello from Java!');");
    }
}</code>

<code>import jdk.nashorn.api.scripting.ScriptEngine;
import jdk.nashorn.api.scripting.ScriptEngineManager;

public class NashornScriptEngine {
    public static void main(String[] args) {
        ScriptEngineManager manager = new ScriptEngineManager();
        ScriptEngine engine = manager.getEngineByName("nashorn");
        engine.eval("print('Hello from Nashorn!');");
    }
}</code>