我正在嘗試生成一個間隔為 15 分鐘的 72 小時時隙陣列，但它在 24 小時后從 00:00 開始，所以基本上它列印整個 24 小時時隙 3 次，但我想從00:15..23:45..24:00..24:45..25:00..25:15..72:00
我使用日歷 API 的經驗較少，
這是我的代碼，
val start_duration = "00:00"
val end_duration = "72:00"
val _start_duration = durationFormatter.parse(start_duration)
val calenderStartDuration = Calendar.getInstance()
val calenderEndDuration = Calendar.getInstance()
calenderStartDuration.time = _start_duration
calenderEndDuration.time = calenderStartDuration.time.addHours(72)
while (calenderStartDuration.before(calenderEndDuration)){
calenderStartDuration.add(Calendar.MINUTE, 15)
val timeStr = durationFormatter.format(calenderStartDuration.time).toLowerCase()
listBookingDuration.add(timeStr)
}
uj5u.com熱心網友回復：
如果您需要創建適合 72 小時時間跨度的“盡可能多的 15 分鐘時段”，從今天午夜開始......那么我將利用 java.time apis 的強大功能：
這是天真的偽代碼，但你明白了：
import java.time.*
fun main() {
val startTime = LocalTime.of(0, 0)
val today = LocalDate.now()
var current = LocalDateTime.of(today, startTime) //use datetime to account for day changes.
val endDateTime = current.plusHours(72)
val timeSlots = mutableListOf<LocalTime>()// or LocalDateTime if you need the "date" component as well.
timeSlots.add(current.toLocalTime()) // add the 1st interval
while (current.isBefore(endDateTime)) {
val newCurrent = current.plusMinutes(15)
timeSlots.add(newCurrent.toLocalTime())
current = newCurrent
}
println(timeSlots)
}
這列印：
[00:00, 00:15, 00:30, 00:45, 01:00, 01:15, 01:30, 01:45, 02:00, 02:15, 02:30, 02:45, 03:00, 03:15, 03:30, 03:45, 04:00, 04:15, 04:30, 04:45, 05:00, 05:15, 05:30, 05:45, 06:00, 06:15, 06:30, 06:45, 07:00, 07:15, 07:30, 07:45, 08:00, 08:15, 08:30, 08:45, 09:00, 09:15, 09:30, 09:45, 10:00, 10:15, 10:30, 10:45, 11:00, 11:15, 11:30, 11:45, 12:00, 12:15, 12:30, 12:45, 13:00, 13:15, 13:30, 13:45, 14:00, 14:15, 14:30, 14:45, 15:00, 15:15, 15:30, 15:45, 16:00, 16:15, 16:30, 16:45, 17:00, 17:15, 17:30, 17:45, 18:00, 18:15, 18:30, 18:45, 19:00, 19:15, 19:30, 19:45, 20:00, 20:15, 20:30, 20:45, 21:00, 21:15, 21:30, 21:45, 22:00, 22:15, 22:30, 22:45, 23:00, 23:15, 23:30, 23:45, 00:00, 00:15, 00:30, 00:45, 01:00, 01:15, 01:30, 01:45, 02:00, 02:15, 02:30, 02:45, 03:00, 03:15, 03:30, 03:45, 04:00, 04:15, 04:30, 04:45, 05:00, 05:15, 05:30, 05:45, 06:00, 06:15, 06:30, 06:45, 07:00, 07:15, 07:30, 07:45, 08:00, 08:15, 08:30, 08:45, 09:00, 09:15, 09:30, 09:45, 10:00, 10:15, 10:30, 10:45, 11:00, 11:15, 11:30, 11:45, 12:00, 12:15, 12:30, 12:45, 13:00, 13:15, 13:30, 13:45, 14:00, 14:15, 14:30, 14:45, 15:00, 15:15, 15:30, 15:45, 16:00, 16:15, 16:30, 16:45, 17:00, 17:15, 17:30, 17:45, 18:00, 18:15, 18:30, 18:45, 19:00, 19:15, 19:30, 19:45, 20:00, 20:15, 20:30, 20:45, 21:00, 21:15, 21:30, 21:45, 22:00, 22:15, 22:30, 22:45, 23:00, 23:15, 23:30, 23:45, 00:00, 00:15, 00:30, 00:45, 01:00, 01:15, 01:30, 01:45, 02:00, 02:15, 02:30, 02:45, 03:00, 03:15, 03:30, 03:45, 04:00, 04:15, 04:30, 04:45, 05:00, 05:15, 05:30, 05:45, 06:00, 06:15, 06:30, 06:45, 07:00, 07:15, 07:30, 07:45, 08:00, 08:15, 08:30, 08:45, 09:00, 09:15, 09:30, 09:45, 10:00, 10:15, 10:30, 10:45, 11:00, 11:15, 11:30, 11:45, 12:00, 12:15, 12:30, 12:45, 13:00, 13:15, 13:30, 13:45, 14:00, 14:15, 14:30, 14:45, 15:00, 15:15, 15:30, 15:45, 16:00, 16:15, 16:30, 16:45, 17:00, 17:15, 17:30, 17:45, 18:00, 18:15, 18:30, 18:45, 19:00, 19:15, 19:30, 19:45, 20:00, 20:15, 20:30, 20:45, 21:00, 21:15, 21:30, 21:45, 22:00, 22:15, 22:30, 22:45, 23:00, 23:15, 23:30, 23:45, 00:00]
你可以嘗試在 Kotlin 游樂場玩這個。
現在，如果您希望 "day2" 列印 24:00、24:15、24:30、24:45、25:00 等，您可能希望將其保留為 aLocalDateTime并利用日期比較來了解位置按照你的順序；我相信您可以弄清楚這部分，因為您可以很容易地使用 Java.Time api 執行日期算術運算。
請注意，這不是唯一的，甚至可能不是最好的方法，但它是一種方法。
另一種方法是保持增量并獲取 startTime.plus(increment)。總而言之，Java Time API 非常簡單。
更新
看來您需要輕推才能完成此操作，所以我在操場上花了 15 分鐘，想出了一個非常幼稚的解決方案。劇透警報，沒有魔法。
您可以在此處找到更新后的 Playground ，并使用它進行游戲。
我很肯定可能會有很多優化，甚至可能有更好的方法來實作這一點，這些方法更實用。希望評論是不言自明的。
呼叫它，transform(list)你會得到一個List<String>列印出來的結果：
[00:00, 00:15 ...omitted for brevity... 24:00, 24:15, 24:30, 24:45, 25:00 ...omitted for brevity... 70:30, 70:45, 71:00, 71:15, 71:30, 71:45, 72:00]
這是“轉換”功能：
fun transform(source: MutableList<LocalDateTime>): List<String> {
val dayMultiplier = 24 //hours per day, duh!
val initialDay = source[0].toLocalDate()
val result = mutableListOf<String>()
source.forEach {
val time = it.toLocalTime()
val hour: Int = time.hour
// calculate the number of days between the dates
val daysBetween = ChronoUnit.DAYS.between(initialDay, it)
// Calculate the offset of hours based on the day difference
val hourOffset = daysBetween * dayMultiplier
//... and add them to the current hour.
val newHour = hour hourOffset
// Add leading zeros (optional)
val reformattedHour = if (newHour < 10) "0$newHour" else newHour
val reformattedMinute = if (time.minute <10) "0${time.minute}" else time.minute
// Naively compose the new time
val newTime = "$reformattedHour:$reformattedMinute"
result.add(newTime)
}
return result
}
uj5u.com熱心網友回復：
使用回圈并迭代直到 72 小時（4320 分鐘）并撰寫邏輯以在 15 分鐘后獲取值
for (i in 0 until 4321) {
val remainder = i % 15
if(remainder==0){
val hours = i / 60; //since both are ints, you get an int
val minutes = i % 60;
listBookingDuration.add(String.format("d", hours) ":" String.format("d", minutes))
}
}
uj5u.com熱心網友回復：
您的問題令人困惑，因為您似乎將時間與持續時間值混合在一起。我會按照你的字面意思接受它。
使用Duration物件來表示未附加到時間線的時間跨度。如果不涉及時間線，請不要使用任何日期時間類。
請注意，java.time類使用不可變物件。因此，當增加 15 分鐘時，我們會生成一個新的新Duration物件，而不是更改（“變異”）原始物件。
List < Duration > durations = new ArrayList <>();
Duration increment = Duration.ofMinutes( 15 );
Duration limit = Duration.ofHours( 72 );
Duration duration = Duration.ofMinutes( 15 ); // First starting value.
while ( duration.compareTo( limit ) <= 0 )
{
durations.add( duration );
// Set up the next loop.
duration = duration.plus( increment );
}
System.out.println( "durations = " durations );
持續時間= [PT15M，PT30M，PT45M，PT1H，PT1H15M，PT1H30M，PT1H45M，PT2H，PT2H15M，PT2H30M，PT2H45M，PT3H，PT3H15M，PT3H30M，PT3H45M，PT4H，PT4H15M，PT4H30M，PT4H45M，PT5H，PT5H15M，PT5H30M，PT5H45M，PT6H ，PT6H15M，PT6H30M，PT6H45M，PT7H，PT7H15M，PT7H30M，PT7H45M，PT8H，PT8H15M，PT8H30M，PT8H45M，PT9H，PT9H15M，PT9H30M，PT9H45M，PT10H，PT10H15M，PT10H30M，PT10H45M，PT11H，PT11H15M，PT11H30M，PT11H45M，PT12H，PT12H15M ，PT12H30M，PT12H45M，PT13H，PT13H15M，PT13H30M，PT13H45M，PT14H，PT14H15M，PT14H30M，PT14H45M，PT15H，PT15H15M，PT15H30M，PT15H45M，PT16H，PT16H15M，PT16H30M，PT16H45M，PT17H，PT17H15M，PT17H30M，PT17H45M，PT18H，PT18H15M，PT18H30M ，PT18H45M，PT19H，PT19H15M，PT19H30M，PT19H45M，PT20H，PT20H15M，PT20H30M，PT20H45M，PT21H，PT21H15M，PT21H30M，PT21H45M，PT22H，PT22H15M，PT22H30M，PT22H45M，PT23H，PT23H15M，PT23H30M，PT23H45M，PT24H，PT24H15M，PT24H30M，PT24H45M，PT25H，PT25H15M，PT25H30M，PT25H45M，PT26H，PT26H15M，PT26H30M，PT26H45M，PT27H，PT27H15M，PT27H30M，PT27H45M，PT28H，PT28H15M，PT28H30M，PT28H45M，PT29H，PT29H15M，PT29H30M，PT29H45M，PT30H，PT30H15M， PT30H30M，PT30H45M，PT31H，PT31H15M，PT31H30M，PT31H45M，PT32H，PT32H15M，PT32H30M，PT32H45M，PT33H，PT33H15M，PT33H30M，PT33H45M，PT34H，PT34H15M，PT34H30M，PT34H45M，PT35H，PT35H15M，PT35H30M，PT35H45M，PT36H，PT36H15M，PT36H30M， PT36H45M，PT37H，PT37H15M，PT37H30M，PT37H45M，PT38H，PT38H15M，PT38H30M，PT38H45M，PT39H，PT39H15M，PT39H30M，PT39H45M，PT40H，PT40H15M，PT40H30M，PT40H45M，PT41H，PT41H15M，PT41H30M，PT41H45M，PT42H，PT42H15M，PT42H30M，PT42H45M， PT43H, PT43H15M, PT43H30M, PT43H45M, PT44H, PT44H15M, PT44H30M, PT44H45M, PT45H, PT45H15M, PT45H30M, PT45H45M, PT46H, PT46H15M, PT4456H30M, PTHPT47,6PT47H15M，PT47H30M，PT47H45M，PT48H，PT48H15M，PT48H30M，PT48H45M，PT49H，PT49H15M，PT49H30M，PT49H45M，PT50H，PT50H15M，PT50H30M，PT50H45M，PT51H，PT51H15M，PT51H30M，PT51H45M，PT52H，PT52H15M，PT52H30M，PT52H45M，PT53H，PT53H15M， PT53H30M，PT53H45M，PT54H，PT54H15M，PT54H30M，PT54H45M，PT55H，PT55H15M，PT55H30M，PT55H45M，PT56H，PT56H15M，PT56H30M，PT56H45M，PT57H，PT57H15M，PT57H30M，PT57H45M，PT58H，PT58H15M，PT58H30M，PT58H45M，PT59H，PT59H15M，PT59H30M， PT59H45M，PT60H，PT60H15M，PT60H30M，PT60H45M，PT61H，PT61H15M，PT61H30M，PT61H45M，PT62H，PT62H15M，PT62H30M，PT62H45M，PT63H，PT63H15M，PT63H30M，PT63H45M，PT64H，PT64H15M，PT64H30M，PT64H45M，PT65H，PT65H15M，PT65H30M，PT65H45M， PT66H, PT66H15M, PT66H30M, PT66H45M, PT67H, PT67H15M, PT67H30M, PT67H45M, PT68H, PT68H15M, PT68H30M, PT68H45M, PT69H, PT69H15M, PT465H30M, PTHPT6,9PT70H15M、PT70H30M、PT70H45M、PT71H、PT71H15M、PT71H30M、PT71H45M、PT72H]
I strongly suggest you do not present these values in clock time: 00:15 through 72:00. This format is inherently ambiguous and easily confused for being a time-of-day. Instead, use standard ISO 8601 format as seen above.
But if you insist, you can create such text.
for ( Duration d : durations )
{
String text = String.format( "d" , d.toHours() ).concat( ":" ).concat( String.format( "d" , d.toMinutesPart() ) );
System.out.println( text );
}
00:15
00:30
00:45
01:00
…
71:00
71:15
71:30
71:45
72:00
If what you really want is to to track every 15 minutes of 72 hours, knowing the date and time-of-day where each of those 15 minute increments lands. For this I would use a Map, a collection key-value pairings. In your case, the key would be a Duration object and the value would be a ZonedDateTime object to represent the date with time-of-day as seen in a particular time zone. Post another Question, if you want to pursue this route.
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