import com.ironsoftware.ironpdf.*;  
import java.io.IOException;  
import java.nio.file.Paths;

// Load background and foreground PDFs from the filesystem (or create them programmatically)  
PdfDocument backgroundPdf = PdfDocument.fromFile(Paths.get("assets/MyBackground.pdf"));  
PdfDocument foregroundPdf = PdfDocument.fromFile(Paths.get("assets/MyForeground.pdf"));  
  
// Render content (HTML, URL, etc) as a PDF Document  
PdfDocument pdf = PdfDocument.renderUrlAsPdf("https://www.nuget.org/packages/IronPdf");  
  
// Add the background and foreground PDFs to the newly-rendered document.  
pdf.addBackgroundPdf(backgroundPdf);  
pdf.addForegroundPdf(foregroundPdf);  
  
pdf.saveAs(Paths.get("assets/BackgroundForegroundPdf.pdf"));