Java API เพื่อแสดงผล EML เป็น XPS

// load the EML file to be converted
MailMessage message = MailMessage.load("sourceFile.eml"); 
// save EML as a HTML 
message.save("HtmlOutput.html", SaveOptions.getDefaultHtml());
// load HTML with an instance of Document
Document document = new Document("HtmlOutput.html");
// call save method while passing SaveFormat.XPS
document.save("output.xps", SaveFormat.XPS);