title: Show all pages of a PDF using Apache PDFBox
body: <p>I'm new in Apache PDFBox, I used org.apache.pdfbox.PDFReader to open PDF and etc,
  but now I need to show in JFrame PDF documents all pages in one JPanel, is it possible?
  <a href="https://i.stack.imgur.com/vThaT.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/vThaT.png" alt="like this"></a></p>