title: Java : calculate remaining time compared to current time
body: <p>I have a string in format :</p>
  
  <pre><code>2015-10-01 02:00
  </code></pre>
  
  <p>I want to print the remaining time compared to current time in Java, it should print in format :</p>
  
  <pre><code>It remains 1 day 4 hours 25 minutes 
  </code></pre>
  
  <p>How could I do that ? Thanks for any ideas.</p>