https://javarevisited.blogspot.com/2013/02/convert-xmlgregoriancalendar-to-date-xmlgregoriancalendar-java-example-tutorial.html?m=0
How to convert XMLGregorianCalendar to Date to XMLGregorianCalendar in Java - Example Tutorial
Java program to convert XMLGregorianCalendar to Date in Java and vice-versa. You can either convert XMLGregorianCalendar to java.util.Date or java.sql.Date...
how to convertjava exampledatetutorial
https://developer.android.com/reference/javax/xml/datatype/XMLGregorianCalendar
XMLGregorianCalendar | API reference | Android Developers
api referenceandroiddevelopers