Usable Browser

src/main/java/org/openautonomousconnection/webclient/FxBootstrap.java

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+package org.openautonomousconnection.webclient;
+
+import javafx.application.Platform;
+import javafx.embed.swing.JFXPanel;
+
+import java.util.concurrent.atomic.AtomicBoolean;
+
+/**
+ * Initializes the JavaFX Toolkit exactly once for Swing embedding.
+ */
+public final class FxBootstrap {
+
+    private static final AtomicBoolean INITIALIZED = new AtomicBoolean(false);
+
+    private FxBootstrap() {
+        // Utility class
+    }
+
+    /**
+     * Ensures JavaFX Toolkit is initialized.
+     * Must be called before any Platform.runLater() usage.
+     */
+    public static void ensureInitialized() {
+        if (!INITIALIZED.compareAndSet(false, true)) {
+            return;
+        }
+
+        // Creating a JFXPanel initializes the JavaFX toolkit in Swing apps.
+        new JFXPanel();
+
+        // Keep JavaFX runtime alive even if last window closes.
+        Platform.setImplicitExit(false);
+    }
+}