title: Get Jenkins build parameter inside java code
body: <p>I have a question about build parameters in Jenkins. </p>
  
  <p>I want add build parameter (url) on Jenkins, and write there any URL, and then use it in code.</p>
  
  <p>Is it posible, and if it is, how I can do this?</p>
  
  <p><code>System.getenv("PARAM_NAME");</code> isn't working for me.</p>
  
  <p>Thanks a lot =)</p>