// For complete examples and data files, please go to https://github.com/groupdocs-viewer/GroupDocs.Viewer-for-Java
try {
// Setup GroupDocs.Viewer config
ViewerConfig config = Utilities.getConfiguration();
// Create image handler
ViewerImageHandler imageHandler = new ViewerImageHandler(config);
// Set PDF file options
PdfFileOptions options = new PdfFileOptions();
options.setGuid(fileName);
// Get file as pdf
FileContainer container = imageHandler.getPdfFile(options);
// Save file
Utilities.saveAsFile(fileName, container.getStream(), ".pdf");
} catch (Exception exp) {
System.out.println("Exception: " + exp.getMessage());
exp.printStackTrace();
}