this worked for me, with kotlin
fun formatToDigitalClock(miliSeconds: Long): String {
val hours = TimeUnit.MILLISECONDS.toHours(miliSeconds).toInt() % 24
val minutes = TimeUnit.MILLISECONDS.toMinutes(miliSeconds).toInt() % 60
val seconds = TimeUnit.MILLISECONDS.toSeconds(miliSeconds).toInt() % 60
return when {
hours > 0 -> String.format("%d:%02d:%02d", hours, minutes, seconds)
minutes > 0 -> String.format("%02d:%02d", minutes, seconds)
seconds > 0 -> String.format("00:%02d", seconds)
else -> {
"00:00"
}
}
}