title: Can I use Java code inside the @Calculation annotation in OpenXava?
body: <p>Does the @Calculation annotation support Java code? For example, does the next code work?</p>
  <pre><code>LocalDate startDate;
  
  @Calculation(&quot;startDate.plusDays(400)&quot;)
  LocalDate endDate;
  </code></pre>
  <p>Otherwise, how can I implement the above case?</p>