带有日历的 SimpleDateFormat 给出了错误的日期

Question

我有以下更新我的日历对象的代码。

val date = DatePickerDialog.OnDateSetListener { _, year, monthOfYear, dayOfMonth ->
    myCalendar.set(year, monthOfYear, dayOfMonth)
    myCalendar.set(Calendar.HOUR, myCalendar.get(Calendar.HOUR))
    myCalendar.set(Calendar.MINUTE, myCalendar.get(Calendar.MINUTE))
    myCalendar.set(Calendar.SECOND, myCalendar.get(Calendar.SECOND))
    updateDate()
}

我收到以下值：

year = 2019
month = 11
day = 31

但是当我执行以下代码时，我得到了 year = 2020:

private fun updateDate()
{
    val myFormat = "dd/MM/YYYY HH:mm:ss"
    val sdf = SimpleDateFormat(myFormat, Locale.getDefault())
    date_et.setText(sdf.format(myCalendar.time))
}

myCalendar.time 给我以下字符串：Tue Dec 31 11:47:00 GMT+01:00 2019

但在 date_et 上出现了以下内容：31/12/2020 11:47:00

Why I have 2019 on Calendar and appears 2020 on my view?

Answer 1

替换

val myFormat = "dd/MM/YYYY HH:mm:ss"

到

val myFormat = "dd/MM/yyyy HH:mm:ss"

带有日历的 SimpleDateFormat 给出了错误的日期

SimpleDateFormat with Calendar giving wrong date

java

android

calendar

date

formatter