Heavyweight

In the default, heavyweight rendering mode, full screen video is enabled and supported.

Lightweight

In the lightweight rendering mode full screen functionality is disabled by default. To enable it, you must implement and register FullScreenHandler where you must track full screen enter/exit events and show/hide full screen window using appropriate Swing or JavaFX functionality.

import com.teamdev.jxbrowser.chromium.Browser;
import com.teamdev.jxbrowser.chromium.BrowserType;
import com.teamdev.jxbrowser.chromium.FullScreenHandler;
import com.teamdev.jxbrowser.chromium.swing.BrowserView;
import java.awt.BorderLayout;
import java.awt.Frame;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;
import javax.swing.WindowConstants;

/**
 * Demonstrates how to switch between fullscreen mode and window mode.
 */
public class FullScreenSample {
    public static void main(String[] args) {
        Browser browser = new Browser(BrowserType.LIGHTWEIGHT);
        BrowserView view = new BrowserView(browser);

        JFrame frame = new JFrame();
        frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        frame.add(view, BorderLayout.CENTER);
        frame.setSize(700, 500);
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);

        browser.setFullScreenHandler(new MyFullScreenHandler(frame, view));

        browser.loadURL("http://www.quirksmode.org/html5/tests/video.html");
    }

    private static class MyFullScreenHandler implements FullScreenHandler {
        private final JFrame parentFrame;
        private final BrowserView view;
        private final JFrame frame;

        private MyFullScreenHandler(JFrame parentFrame, BrowserView view) {
            this.parentFrame = parentFrame;
            this.view = view;
            this.frame = createFrame();
        }

        private static JFrame createFrame() {
            JFrame frame = new JFrame();
            frame.setUndecorated(true);
            frame.setExtendedState(Frame.MAXIMIZED_BOTH);
            return frame;
        }

        @Override
        public void onFullScreenEnter() {
            SwingUtilities.invokeLater(new Runnable() {
                @Override
                public void run() {
                    parentFrame.getContentPane().remove(view);
                    frame.getContentPane().add(view);
                    frame.setVisible(true);
                    parentFrame.setVisible(false);
                }
            });
        }

        @Override
        public void onFullScreenExit() {
            SwingUtilities.invokeLater(new Runnable() {
                @Override
                public void run() {
                    frame.getContentPane().remove(view);
                    parentFrame.getContentPane().add(view);
                    parentFrame.setVisible(true);
                    frame.setVisible(false);
                }
            });
        }
    }
}