How to split Japanese Date which include month and year into or Date format [duplicate] - date

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Closed 2 years ago.
I want to split Japanese date which is in format "2020年7月" into separate array so that can get the year and month from that.
I tried SimpleDateFormatter to format Japanese date with and have the year and date separated with "/"but the output is wrong:
Tried this code:
val inputFormat = SimpleDateFormat("YYYY年M月")
val date = inputFormat.parse("2020年7月")
val outputText = SimpleDateFormat("YYYY/MM").format(date)
input :2020年7月
output:2020/12
Can anyone help me in this?

Answer 1

You should be using java.time for this because the datetime classes from java.util are outdated (but still not deprecated).
The following example shows a way using a java.time.format.DateTimeFormatter for parsing a String formatted according to a certain pattern and a java.time.YearMonth, a class obviously designed for the purpose of creating a month in a year without respect to a day of month:
import java.time.YearMonth;
import java.time.format.DateTimeFormatter;
fun main() {
val jpYearMonth = "2020年7月"
val japaneseDtf = DateTimeFormatter.ofPattern("uuuu年M月")
val yearMonth = YearMonth.parse(jpYearMonth, japaneseDtf)
println(yearMonth.format(DateTimeFormatter.ofPattern("uuuu/MM")))
}
In order to achieve your desired output this code has to use a different DateTimeFormatter defining the output pattern because the default pattern (internal use when you just println(yearMonth)) would be hyphon-separated (2020-07):
2020/07