memo
code:s
>> import java.time.LocalDateTime
>> import java.time.format.DateTimeFormatter
>> val s1 = "2016-12-20T06:17:01Z"
>> val d1 = LocalDateTime.parse(s1, DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mm:ss'Z'"))
>> d1.javaClass
class java.time.LocalDateTime
>> d1.javaClass.kotlin
class java.time.LocalDateTime
>> d.getMinute()
17
>> val s2 = "2016-10-20T06:17:01Z"
>> val d2 = LocalDateTime.parse(s2, DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mm:ss'Z'"))
>> d1.isBefore(d2)
false
>> d1.isAfter(d2)
true