How to display a web page in Java

Crossability Winmostar Support team.

1. Display a web page in Java

JavaFX, Java's default GUI, has the ability to display web pages. In this article, I'll show you how. Web pages can be viewed using a class called WebView. Below is the sample code.

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.layout.BorderPane;
import javafx.scene.web.WebEngine;
import javafx.scene.web.WebView;
import javafx.stage.Stage;

public class WebTest extends Application {

    private WebView webView;

    @Override
    public void start(Stage stage) {
        this.webView = new WebView();
        WebEngine webEngine = webView.getEngine();
        webEngine.load("https://x-ability.co.jp");

        BorderPane pane = new BorderPane(this.webView);
        Scene scene = new Scene(pane, 500, 500);

        stage.setScene(scene);
        stage.setMaximized(true);
        stage.show();
    }

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

2. URL update

Use WebEngine # load to update the URL set in WebView.

    private void updateURL(String url) {
        WebEngine webEngine = this.webView.getEngine();
        webEngine.load(url);
    }

3. Go forward / back on page

Use WebHistory # go to go back or forth on the page you are viewing.

    private void goForward() {
        WebEngine webEngine = this.webView.getEngine();
        WebHistory webHistory = webEngine.getHistory();
        webHistory.go(+1);
    }

    private void goBackward() {
        WebEngine webEngine = this.webView.getEngine();
        WebHistory webHistory = webEngine.getHistory();
        webHistory.go(-1);
    }

4. Close the window

Implements JavaFX window closing process when a window closing event occurs from a web page. Use WebEngine # setOnVisibilityChanged.

    @Override
    public void start(Stage stage) {
        ...abridgement...
        stage.show();

        webEngine.setOnVisibilityChanged(event -> {
            if (!event.getData()) {
                stage.hide();
            }
        });
    }

5. Display a pop-up

Implement the process to display a new window in JavaFX when an event to display a pop-up occurs from a web page. Use WebEngine # setCreatePopupHandler.

    @Override
    public void start(Stage stage) {
        ...abridgement...
        stage.show();

        webEngine.setCreatePopupHandler(config -> {
            WebView webView2 = new WebView();
            WebEngine webEngine2 = webView2.getEngine();
            webEngine2.load("about:blank");

            BorderPane pane2 = new BorderPane(webView2);
            Scene scene2 = new Scene(pane2, 500, 500);

            Stage stage2 = new Stage();
            stage2.setScene(scene2);
            stage2.show();

            return webEngine2;
        });
    }