Update Docker tutorial example

tutorials/docker/Dockerfile

@@ -1,45 +1,42 @@
-FROM ubuntu:20.04
+FROM ubuntu:24.04
 
 ENV DEBIAN_FRONTEND=noninteractive
-ENV TZ=UTC
 
 RUN apt update
 
 # Install JDK.
-RUN apt install -y openjdk-8-jdk
+RUN apt install -y openjdk-17-jdk
 
 # Install Chromium's runtime dependencies.
 RUN apt install -y \
-    libasound2 \
+    ca-certificates \
+    fonts-liberation \
+    libasound2t64 \
     libatk-bridge2.0-0 \
     libatk1.0-0 \
     libatspi2.0-0 \
     libc6 \
-    libcairo2  \
+    libcairo2 \
     libcups2 \
     libdbus-1-3 \
     libdrm2 \
     libexpat1 \
-    libfontconfig1 \
     libgbm1 \
-    libgcc-s1 \
     libglib2.0-0 \
     libgtk-3-0 \
     libnspr4 \
     libnss3 \
     libpango-1.0-0 \
-    libpulse0 \
+    libu2f-udev \
+    libvulkan1 \
     libx11-6 \
     libxcb1 \
     libxcomposite1 \
     libxdamage1 \
     libxext6 \
     libxfixes3 \
     libxkbcommon0 \
-    libxrandr2 \
-    libxshmfence1 \
-    libxtst6 \
-    xdg-utils
+    libxrandr2
 
 # Install a virtual X11 server that is required for Chromium to work.
 RUN apt install -y xvfb
@@ -56,5 +53,6 @@ COPY project/ project
 # Build the Java project.
 RUN cd project && ./gradlew build
 
+# Set the working directory and the entrypoint.
 WORKDIR /
 ENTRYPOINT ["sh", "-c", "/startup.sh"]

tutorials/docker/project/build.gradle.kts

@@ -22,7 +22,7 @@ plugins {
     java
     application
     // Provides convenience methods for adding JxBrowser dependencies into a project.
-    id("com.teamdev.jxbrowser") version "1.1.0"
+    id("com.teamdev.jxbrowser") version "2.0.0"
 }
 
 application {
@@ -33,11 +33,17 @@ repositories {
     mavenCentral()
 }
 
+java {
+    toolchain {
+        languageVersion.set(JavaLanguageVersion.of(17))
+    }
+}
+
 jxbrowser {
-    version = "7.41.0"
+    version = "8.16.1"
 }
 
 dependencies {
     implementation(jxbrowser.swing)
-    implementation(jxbrowser.linux64)
+    implementation(jxbrowser.currentPlatform)
 }

tutorials/docker/project/src/main/java/DemoApp.java

@@ -42,27 +42,29 @@ public final class DemoApp {
 
     public static void main(String[] args) {
         // Set your JxBrowser license key.
-        System.setProperty("jxbrowser.license.key", "ENTER YOUR LICENSE KEY HERE");
+        System.setProperty("jxbrowser.license.key", "YOUR_LICENSE_KEY");
 
-        EngineOptions.Builder options = EngineOptions.newBuilder(HARDWARE_ACCELERATED);
+        var options = EngineOptions.newBuilder(HARDWARE_ACCELERATED);
 
-        // #docfragment "enable-remote-debugging-port"
         // Enable the remote debugging port.
+        options.addSwitch("--remote-allow-origins=http://localhost:9222");
         options.remoteDebuggingPort(9222);
-        // #enddocfragment "enable-remote-debugging-port"
+
+        // Disable Chromium sandbox for Docker.
+        options.disableSandbox();
 
         // Creating Chromium engine.
-        Engine engine = Engine.newInstance(options.build());
-        Browser browser = engine.newBrowser();
+        var engine = Engine.newInstance(options.build());
+        var browser = engine.newBrowser();
 
         // Print the web page's title once the page is loaded.
         browser.navigation().on(LoadFinished.class, event -> {
             System.out.println("Title: " + browser.title());
         });
 
         SwingUtilities.invokeLater(() -> {
-            final BrowserView view = BrowserView.newInstance(browser);
-            JFrame frame = new JFrame("Demo App");
+            var view = BrowserView.newInstance(browser);
+            var frame = new JFrame("Demo App");
             frame.addWindowListener(new WindowAdapter() {
                 @Override
                 public void windowClosing(WindowEvent e) {

tutorials/docker/startup.sh

@@ -20,10 +20,16 @@
 #
 
 # Launch a virtual X11 server for Chromium.
-Xvfb :0 -screen 0 800x600x24+32 &
+#
+# If DISPLAY is not set, start a virtual X server (headless mode).
+# If DISPLAY is set, connect to the host X server (desktop mode).
+if [ -z "${DISPLAY:-}" ]; then
+  Xvfb :0 -screen 0 1920x1080x24+32 &
+  export DISPLAY=:0
+fi
 
 # Switch to the project directory.
 cd project
 
 # Start the Java application.
-DISPLAY=:0 ./gradlew run
+./gradlew run