title: How can i Open .pdf file in java
body: <p>As I'm developing a desktop based application, there's a user manual in .pdf format which should be opened while user click on a help menu item. </p>
  
  <p>I don't know the way to open .pdf file from swing application, so how can i get it open in my <code>jframe</code> or in any pdf file viewer such as acrobat reader.</p>