title: Making this "(" currency ")" on iReport
body: <p>I've been trying to put a value(double) between parentheses on iReport.
  I get a Object as double and tried to put parenthesis on it, but it won't let me do it. It says: "Cannot cast from String to Double"
  I've made like this:</p>
  
  <pre><code>"(" + $F{someValue} + ")"
  </code></pre>
  
  <p>Any idea? I don't want to create a String object on Java, unless there's no way to do it on iReport and it's really needed.</p>