In the next code sample, each argument is composed of a set of keys and values. The order of arguments are not important and only the key matters. That example defines a field with the id as "hiddenField2", which will generate a hidden field. The value of this field will be automatically set to UTF-8 and no visible field will be printed on the form.

String[] hiddenField2 = ["jcrPath=/node/jcr:content/jcr:encoding", "visible=false", "UTF-8"];

uicomponent.addHiddenField("hiddenInput2", hiddenField2);

Once the form has been saved, the date value will be saved under the relative JCR path ./exo:image/jcr:lastModified.