Utilities.java

/**
 * Eagerly execute some initialization such as loading of standard fonts.
 */
public static void initializePDFRenderer() {
    final PDDocument document = new PDDocument();
    new PdfBoxFontResolver(null, document, null, PdfRendererBuilder.PdfAConformance.NONE, false);
    try {
        document.close();
    } catch (final IOException e) {
        throw new RuntimeException(e);
    }
}