returns a string representation of the given date time in yyyymmdd format . the date returned is in the utc zone . for example , given a time `` 1416863450581 '' , this method returns `` 20141124 '' concode_field_sep DateTimeFormatter timeFormatter concode_elem_sep DateTimeFormatter dateFormatter concode_field_sep String formatTimestamp
String function ( long arg0 ) { return dateFormatter . print ( arg0 ) ; }