title: How to use .jar files in NetBeans?
body: <p>I am completely new to Java development so bear with me... </p>
  
  <p>I have downloaded the Joda time library which consists of three files: </p>
  
  <ul>
  <li>joda-time-1.6.jar </li>
  <li>joda-time-1.6-javadoc.jar </li>
  <li>joda-time-1.6-sources.jar </li>
  </ul>
  
  <p>Firstly, how do I use this library in one of my own NetBeans projects? </p>
  
  <p>Secondly, generally speaking, what is the distinction between the three files above? What do the labels 'javadoc' and 'sources' signify? How are these jars different from the 'joda-time-1.6.jar' library? </p>
  
  <p>Many thanks for any help.</p>