title: System.getenv("computername") truncating return value
body: <p>What is the difference between <code>System.getenv("computername")</code> and <code>System.getenv("hostname")</code> in Java?</p>
  
  <p>Is there any character limit on the computer name when retrieving it using the <code>getenv()</code> method?</p>
  
  <p>I have a lengthy hostname and <code>System.getenv("computername")</code> seems to be truncating it to 15 characters. OS used is Windows.</p>