import java.time.DayOfWeek;
import java.time.LocalDateTime;
import java.time.temporal.TemporalAdjusters;
import java.util.ArrayList;
import java.util.Comparator;
import java.util.List;
public class Main {
public static void main(String[] argv) {
DayOfWeek d = DayOfWeek.FRIDAY;
List<DayOfWeek> l = new ArrayList<>();
l.add(d);
System.out.println(getNextClosestDateTime(l,22,20));
}
/**
* Gets the next or same closest date from the specified days in
* {@code daysOfWeek List} at specified {@code hour} and {@code min}.
*
* @param daysOfWeek
* the days of week
* @param hour
* the hour
* @param min
* the min
* @return the next or same date from the days of week at specified time
* @throws IllegalArgumentException
* if the {@code daysOfWeek List} is empty.
*/
public static LocalDateTime getNextClosestDateTime(
List<DayOfWeek> daysOfWeek, int hour, int min)
throws IllegalArgumentException {
if (daysOfWeek.isEmpty()) {
throw new IllegalArgumentException("daysOfWeek should not be empty.");
}
final LocalDateTime dateNow = LocalDateTime.now();
final LocalDateTime dateNowWithDifferentTime = dateNow.withHour(hour)
.withMinute(min).withSecond(0);
// @formatter:off
return daysOfWeek
.stream()
.map(
d -> dateNowWithDifferentTime.with(TemporalAdjusters.nextOrSame(d)))
.filter(d -> d.isAfter(dateNow))
.min(Comparator.naturalOrder())
.orElse(
dateNowWithDifferentTime.with(TemporalAdjusters.next(daysOfWeek
.get(0))));
// @formatter:on
}
}
/*
* Copyright (C) 2004-2015 L2J Server
*
* This file is part of L2J Server.
*
* L2J Server is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* L2J Server is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
【date】
