title: What is the jconsole time format?
body: <p>I have monitored my java program using jconsole recently. I saved CPU usage data as a csv file. This is what I've got:</p>
  
  <pre><code>Time,CPU Usage
  43690.008014,1,8
  43690.008060,0,1
  43690.008106,0,1
  43690.008153,0,1
  43690.008199,0,1
  43690.008245,0,1
  </code></pre>
  
  <p>The <code>CPU Usage</code> column is clear, but I cannot say the same thing about the <code>Time</code> column. What is <code>43690.008014</code>? How can I parse it into <code>Date</code>? I haven't seen anything like this in my life.</p>