title: Division of numbers
body: <p>I could see in Timestamp class, the constructor goes like:</p>
  
  <pre><code>    public Timestamp(long time) {
      super((time/1000)*1000);
      ....................
  </code></pre>
  
  <p>What Im not understanding is, what is the need of dividing the time by 1000 and then multiplying again by 1000. What difference will it make? Isn't this piece redundant?</p>