title: adding n number of zeros after decimal
body: <p>I need to give accuracy of a number entered by user till few digit. like if user enter some random value and gives that he wants accuracy till three digit then I need to round off the digit till three places after decimal. So i did something like this</p>
  
  <pre><code> int index = value.indexOf('.'); 
              if (index &gt;= 0)
              {
                  String fractional = value.substring(index);
  
                  if (fractional.length() &gt; decimalPlaces)
                  {
                      floatValue = roundOffDecimals(floatValue, decimalPlaces);
                  }
              }
              retVal = new Float(floatValue);
  </code></pre>
  
  <p>but when user enters some value but do not enters any value as decimal I need to display it as dismal value with zeros as number of decimal places. 
  like for 15 is his number and 3 is his accuracy then I need to display number as 15.000</p>
  
  <p>I am not able to display zero after decimal when it always changes. Please help.
  I tried DeciamlFormat df = new DecimalFormat("",#.##); but takes static value. And my accuracy keeps changing.</p>
  
  <p>Any help will be appreciated.</p>