使用Java标准库简单、简洁地表达“明天上午10:30”

标准API中没有方便的方法,您需要一个类似

Calendar cal = Calendar.getInstance();
Date today = cal.getTime();
cal.set(Calendar.HOUR, 10);
cal.set(Calendar.MINUTE,30);
cal.set(Calendar.SECOND,0);
cal.set(Calendar.AM_PM, Calendar.AM);

Date next = cal.getTime();
if (today.after(next)) {
    cal.add(Calendar.DAY_OF_MONTH, 1);
}
System.out.println(cal.getTime());

你应该把它放到一个实用类中。

你可能还想看看 Joda

final LocalDateTime now = new LocalDateTime().withSecondOfMinute(0).withMillisOfDay(0);
final LocalDateTime tenThirty;
if (now.getHourOfDay() <= 10 && now.getMinuteOfHour() <= 30) {
    tenThirty = now.withHourOfDay(10).withMinuteOfHour(30);
} else {
    tenThirty = now.plusDays(1).withHourOfDay(10).withMinuteOfHour(30);
}