title: Give me an example to generate barcode in Java
body: <p>I'm just new here and I know that this site will surely help me out with my concerns,a friend told me.
  Well, I'm having a hard time to create a program on how generate a barcode using Java.
  I need to generate unique barcode for books.
  What I want to happen is that, I want to generate a barcode with an intended Book_Id, the Book_Id will be inputted by the user and when the button is click, it will generate a barcode with a corresponding Book_Id.</p>
  
  <p>Please help me out of this,I really need your help sirs.</p>