练习java文档MonthDay
MonthDayadjustInto()涉及到Temporal先放着atYear()compareTo()也是返回差值equals()也是时间相等就返回trueformat()from()涉及到TemporalAccessor先放着get()涉及到TemporalField先放着getDayOfMonth()getLong()涉及到TemporalField先放着getMonth()getMonthValue()hashCode() 一个月是64，一天是1isAfter()isB
