/** {@inheritDoc} */ public void setBackgroundColor(Color color) { if (color == null) { String message = Logging.getMessage("nullValue.ColorIsNull"); Logging.logger().severe(message); throw new IllegalArgumentException(message); } // Only set the color if it actually changed if (!color.equals(this.getBackgroundColor())) { this.backgroundColor = color; // Convert the color to an RGB hex triplet string that the WebBrowser will understand int rgb = (color.getRed() & 0xFF) << 16 | (color.getGreen() & 0xFF) << 8 | (color.getBlue() & 0xFF); String colorString = String.format("#%06X", rgb); WindowsWebViewJNI.setBackgroundColor(this.webViewWindowPtr, colorString); } }