iText Java - Document Metadata values are blank

Problem Description:

Using iText java to create PDF with meta-data values as follows. PDF created successfully however the meta-data values are empty or blank.

Document document = new Document(PageSize.A4, -55, -65, 20, 7);
document.addAuthor("pdfAuthor");
document.addCreator("pdfCreator");
document.addCreationDate();
document.addTitle("Title");
document.addSubject("Subject");
document.addKeywords("Keywords");
 
PdfWriter writer = null;
ByteArrayOutputStream byteOut = null;
byteOut = new ByteArrayOutputStream();                           
writer = PdfWriter.getInstance(document, byteOut);
document.open();

Solution:

Always add document meta-data after creating the PdfWriter Instance. So move the highlighted codes below PdfWriter.getInstance.

Document document = new Document(PageSize.A4, -55, -65, 20, 7);
PdfWriter writer = null;
ByteArrayOutputStream byteOut = null;

byteOut = new ByteArrayOutputStream();                          
writer = PdfWriter.getInstance(document, byteOut);
document.addAuthor("pdfAuthor");
document.addCreator("pdfCreator");
document.addCreationDate();
document.addTitle("Title");
document.addSubject("Subject");
document.addKeywords("Keywords");
document.open();