PdfEncryptionAlgorithm.AES

//Create password security policies
PdfSecurityPolicy securityPolicy = new PdfPasswordSecurityPolicy("", "123456"); 
//Set AES encryption algorithm
securityPolicy.setEncryptionAlgorithm( PdfEncryptionAlgorithm.AES_256); 
//Set document permissions (ownership), default is ForbidAll.
securityPolicy.setDocumentPrivilege(PdfDocumentPrivilege.getForbidAll());
securityPolicy.getDocumentPrivilege().setAllowDegradedPrinting(true);
securityPolicy.getDocumentPrivilege().setAllowModifyAnnotations(true);
securityPolicy.getDocumentPrivilege().setAllowAssembly(true);
securityPolicy.getDocumentPrivilege().setAllowModifyContents(true);
securityPolicy.getDocumentPrivilege().setAllowFillFormFields(true);
securityPolicy.getDocumentPrivilege().setAllowPrint(true);
pdf.encrypt(securityPolicy);

PdfDocument pdf = new PdfDocument();
//Pass the open password to open the PDF document
pdf.loadFromFile(inputFile, "1234"); 
//Decrypt
pdf.decrypt();
pdf.saveToFile(outputFile, FileFormat.PDF);
pdf.dispose();

PdfDocument document=new PdfDocument();
document.loadFromFile("input.pdf");
PdfFormWidget formWidget = (PdfFormWidget)document.getForm();
for (int i = 0; i < formWidget.getFieldsWidget().getCount(); i++)
{
    PdfField field = (PdfField)formWidget.getFieldsWidget().get(i);
    for (PdfFieldWidget widget : (Iterable) formWidget.getFieldsWidget())
    {
        if (widget.getName() == "oldName")
        {
            widget.setName("NewName");
        }
    }
}
document.saveToFile("result.pdf",FileFormat.PDF);

PdfDocument document=new PdfDocument();
document.loadFromFile("input.pdf");
XlsxSpecialTableLayoutOptions options=new XlsxSpecialTableLayoutOptions(false, false, false);
document.getConvertOptions().setPdfToXlsxOptions(options);
document.saveToFile("output.pdf", FileFormat.XLSX);

document.saveToFile("output.svgz", FileFormat.SVGZ);

PdfDocument pdf1 = new PdfDocument(inputFile_1);
PdfDocument pdf2 = new PdfDocument(inputFile_2);
PdfComparer compare = new PdfComparer(pdf1, pdf2);
compare.getOptions().setPageRanges(0, pdf1.getPages().getCount() - 1, 0, pdf2.getPages().getCount() - 1);
compare.compare(outputFile);

PdfToWordConverter converter = new PdfToWordConverter(inputPath); 
converter.saveToDocx(OutputPath);
converter.dispose();

PdfDocument pdfDocument = new PdfDocument(); 
pdfDocument.loadFromFile("input.pdf"); 
PdfPageBase pdfPageBase = pdfDocument.getPages().get(0); 
// setting the "crop box". 
pdfPageBase.setCropBox(new Rectangle2D.Float(0,0,400,800));
pdfDocument.saveToFile("output.pdf", FileFormat.PDF);

PdfDocument pdf = new PdfDocument();
pdf.loadFromFile(inputFile);
PrintSettings setting = pdf.getPrintSettings();
pdf.getPrintSettings().setPaperMargins(30,30, 30, 30);
setting.setPrinter("Microsoft XPS Document Writer");
pdf.getPrintSettings().printToFile(outputFile);
pdf.print();
pdf.close();

PdfToWordConverter converter(inputPath);
converter.saveToDocx(OutputPath);
converter.dispose();

pdfDocument.getConvertOptions().setPdfToHtmlOptions(bool useEmbeddedSvg, bool useEmbeddedImg)
pdfDocument.getConvertOptions().setPdfToHtmlOptions(bool useEmbeddedSvg, bool useEmbeddedImg, int maxPageOneFile)