java.util.Calendar.add throws ArrayIndexOutOfBoundsException under the below condition.

X = 1- ((Calendar.MONTH+1) + amount), and if X is a multiple of 12, AIOOBE is thrown.

The reproducer is below:

jshell> var calendar = Calendar.getInstance(new Locale("ja", "JP", "JP"))
calendar ==> java.util.JapaneseImperialCalendar[time=163184924 ...
SET=32400000,DST_OFFSET=0]

jshell> var month = 2
month ==> 2

jshell> var amount = -14
amount ==> -14

jshell> calendar.set(2, month, 1, 1, 0)

jshell> calendar.add(Calendar.MONTH, amount)
| 例外java.lang.ArrayIndexOutOfBoundsException: Index 13 out of bounds for
length 13
| at BaseCalendar.getDayOfYear (BaseCalendar.java:348)
| at BaseCalendar.getFixedDate (BaseCalendar.java:381)
| at BaseCalendar.getFixedDate (BaseCalendar.java:356)
| at AbstractCalendar.getTime (AbstractCalendar.java:175)
| at BaseCalendar.normalize (BaseCalendar.java:228)
| at LocalGregorianCalendar.normalize
(LocalGregorianCalendar.java:328)
| at JapaneseImperialCalendar.pinDayOfMonth
(JapaneseImperialCalendar.java:2288)
| at JapaneseImperialCalendar.add (JapaneseImperialCalendar.java:452)
| at (#5:1)


In this reproducer, X=1-((2+1)+(-14)) = 12. In this case, AIOOBE is thrown.
The issue is reproduced in 18, 16.0.2, 11.0.13 and 8u311.