// Create a new empty document
PDDocument document = new PDDocument();

// Create a new blank page and add it to the document
PDPage blankPage = new PDPage();
document.addPage( blankPage );

// Save the newly created document
document.save("BlankPage.pdf");

// finally make sure that the document is properly
// closed.
document.close();

// Create a document and add a page to it
PDDocument document = new PDDocument();
PDPage page = new PDPage();
document.addPage( page );

// Create a new font object selecting one of the PDF base fonts
PDFont font = PDType1Font.HELVETICA_BOLD;

// Start a new content stream which will "hold" the to be created content
PDPageContentStream contentStream = new PDPageContentStream(document, page);

// Define a text content stream using the selected font, moving the cursor and drawing the text "Hello World"
contentStream.beginText();
contentStream.setFont( font, 12 );
contentStream.moveTextPositionByAmount( 100, 700 );
contentStream.drawString( "Hello World" );
contentStream.endText();

// Make sure that the content stream is closed:
contentStream.close();

// Save the results and ensure that the document is properly closed:
document.save( "Hello World.pdf");
document.close();