src/macosx/classes/sun/lwawt/macosx/CFileDialog.java

@@ -412,6 +412,14 @@
 
     @Override
     public boolean updateGraphicsData(GraphicsConfiguration gc) {
         return false;
     }
+    
+    @Override
+    public void grabFocus() {
+    }
+    
+    @Override
+    public void ungrabFocus(boolean postEvent) {
+    }
 }