That's a legacy FORMCHECKBOX - a completely different beast.
To see how it is represented in docx4j, you can upload your docx to the webapp (linked in menu above).
docx4j's higher level code for manipulating fields is in
https://github.com/plutext/docx4j/tree/ ... del/fieldsFieldRef contains:
Using java Syntax Highlighting
/**
* Properties specific to FORMCHECKBOX, FORMDROPDOWN, FORMTEXT
*
* @return the formFieldProperties
* @see <a href="http://webapp.docx4java.org/OnlineDemo/ecma376/WordML/ffData.html">the spec</a>
*/
public CTFFData getFormFieldProperties
() {
return formFieldProperties
;
}
Parsed in 0.013 seconds, using
GeSHi 1.0.8.4
and there is a corresponding setter.
If you want to try using this, you'll probably need to study the source code.
Bear in mind that the spec provides for simple and complex fields. The strategy in that package is to convert simple fields to complex ones, so it can focus on manipulating complex fields only.