serialization spec requires serialVersionUID to be private, but the one
appearing in java.util.Locale is default protection.
In java.util:
Calendar.java:851: static final long serialVersionUID = -1807547505821590642L;
GregorianCalendar.java:450: static final long serialVersionUID = -8125100834729963327L;
Locale.java:251: static final long serialVersionUID = 9149081749638150636L;
SimpleTimeZone.java:1219: static final long serialVersionUID = -403250971215465050L;
TimeZone.java:150: static final long serialVersionUID = 3581463369166924961L;
In java.text:
DateFormatSymbols.java:202: static final long serialVersionUID = -5987973545549424702L;
DecimalFormat.java:3172: static final long serialVersionUID = 864413376551465018L;
DecimalFormatSymbols.java:629: static final long serialVersionUID = 5772796243397350300L;
NumberFormat.java:926: static final long serialVersionUID = -2308460125733713944L;
SimpleDateFormat.java:319: static final long serialVersionUID = 4774881970558875024L;