title: Show padding zeros using DecimalFormat
body: <p>I'm using DecimalFormat to format doubles to 2 decimal places like this:</p>
  
  <pre><code>DecimalFormat dec = new DecimalFormat("#.##");
  double rawPercent = ( (double)(count.getCount().intValue()) / 
                              (double)(total.intValue()) ) * 100.00;
  double percentage = Double.valueOf(dec.format(rawPercent));
  </code></pre>
  
  <p>It works, but if i have a number like 20, it gives me this:</p>
  
  <pre><code>20.0
  </code></pre>
  
  <p>and I want this:</p>
  
  <pre><code>20.00
  </code></pre>
  
  <p>Any suggestions?</p>