title: Get the number of milliseconds since some date
body: <p>How to get the number of milliseconds from October 15th 2011 1:52:34 P.M.</p>
  
  <p>I can get the number of milliseconds from the current time.</p>
  
  <pre><code>Date date = new Date();
          long currentTime = date.getTime();
          System.out.println("Current time in long: " + currentTime);
  </code></pre>