&引用；这是一个月的第三个星期四吗Java库？

我有几十个待办事项请求正在处理中，比如

'I need this functionality to run on the third Thursday of every month, and the first Wednesday of every other month...'

我已经有了一个每天运行的函数，我只需要将：

isThirdSundayOfMonth（date）

位附加到end

我花在考虑公历和时区的细微差别上的时间越少，我的生活就越好

有人知道简化这种计算的Java库吗？没有xml配置、框架或任何东西。只要一个.Jar和一个文档化的、可读的API就可以了

---

任何帮助都将不胜感激

所有与日期和时间相关的事物的规范库都是。采用它并清除所有标准java类，如

Date

，

Calendar

等

它会让你的生活变得更好

至于“我如何利用乔达的时间来找到一个月的第三个星期四”，还有一个问题。我建议使用提问者发布的代码，然后回答“现在是本月的第三个星期四吗？”

LocalDate today = new LocalDate();
if (today.equals(calcDayOfWeekOfMonth(DateTimeConstants.THURSDAY, 3, today))) {
    // do special third-Thursday processing here
}

---

所有与日期和时间相关的事物的规范库都是。采用它并清除所有标准java类，如

Date

，

Calendar

等

它会让你的生活变得更好

至于“我如何利用乔达的时间来找到一个月的第三个星期四”，还有一个问题。我建议使用提问者发布的代码，然后回答“现在是本月的第三个星期四吗？”

LocalDate today = new LocalDate();
if (today.equals(calcDayOfWeekOfMonth(DateTimeConstants.THURSDAY, 3, today))) {
    // do special third-Thursday processing here
}

---

所有与日期和时间相关的事物的规范库都是。采用它并清除所有标准java类，如

Date

，

Calendar

等

它会让你的生活变得更好

至于“我如何利用乔达的时间来找到一个月的第三个星期四”，还有一个问题。我建议使用提问者发布的代码，然后回答“现在是本月的第三个星期四吗？”

LocalDate today = new LocalDate();
if (today.equals(calcDayOfWeekOfMonth(DateTimeConstants.THURSDAY, 3, today))) {
    // do special third-Thursday processing here
}

---

所有与日期和时间相关的事物的规范库都是。采用它并清除所有标准java类，如

Date

，

Calendar

等

它会让你的生活变得更好

至于“我如何利用乔达的时间来找到一个月的第三个星期四”，还有一个问题。我建议使用提问者发布的代码，然后回答“现在是本月的第三个星期四吗？”

LocalDate today = new LocalDate();
if (today.equals(calcDayOfWeekOfMonth(DateTimeConstants.THURSDAY, 3, today))) {
    // do special third-Thursday processing here
}

完整概述： 在Java-8（新标准）中：

LocalDate input = LocalDate.now(); // using system timezone
int ordinal = 3;
DayOfWeek weekday = DayOfWeek.SUNDAY;

LocalDate adjusted = 
  input.with(TemporalAdjusters.dayOfWeekInMonth(ordinal, weekday));
boolean isThirdSundayInMonth = input.equals(adjusted);

LocalDate input = new LocalDate(); // using system timezone
int ordinal = 3;
int weekday = DateTimeConstants.SUNDAY;

LocalDate start = new LocalDate(input.getYear(), input.getMonthOfYear(), 1);
LocalDate date = start.withDayOfWeek(weekday);
LocalDate adjusted = (
  date.isBefore(start)) 
  ? date.plusWeeks(ordinal) 
  : date.plusWeeks(ordinal - 1);
boolean isThirdSundayInMonth = input.equals(adjusted);

SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
GregorianCalendar input = new GregorianCalendar();
int ordinal = 3;
int weekday = Calendar.SUNDAY;

GregorianCalendar start =
    new GregorianCalendar(input.get(Calendar.YEAR), input.get(Calendar.MONTH), 1);
int dow = start.get(Calendar.DAY_OF_WEEK); // Sun=1, Mon=2, ...
int delta = (weekday - dow);
if (delta < 0) {
    delta += 7;
}
start.add(Calendar.DAY_OF_MONTH, delta + (ordinal - 1) * 7);
String comp1 = sdf.format(input.getTime());
String comp2 = sdf.format(start.getTime());
boolean isThirdSundayInMonth = comp1.equals(comp2);

PlainDate input = 
  SystemClock.inLocalView().today(); // using system timezone
Weekday weekday = Weekday.SUNDAY;

PlainDate adjusted = 
  input.with(PlainDate.WEEKDAY_IN_MONTH.setToThird(weekday));
boolean isThirdSundayInMonth = input.equals(adjusted);

在Joda时代（流行的第三方库）：

LocalDate input = LocalDate.now(); // using system timezone
int ordinal = 3;
DayOfWeek weekday = DayOfWeek.SUNDAY;

LocalDate adjusted = 
  input.with(TemporalAdjusters.dayOfWeekInMonth(ordinal, weekday));
boolean isThirdSundayInMonth = input.equals(adjusted);

LocalDate input = new LocalDate(); // using system timezone
int ordinal = 3;
int weekday = DateTimeConstants.SUNDAY;

LocalDate start = new LocalDate(input.getYear(), input.getMonthOfYear(), 1);
LocalDate date = start.withDayOfWeek(weekday);
LocalDate adjusted = (
  date.isBefore(start)) 
  ? date.plusWeeks(ordinal) 
  : date.plusWeeks(ordinal - 1);
boolean isThirdSundayInMonth = input.equals(adjusted);

SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
GregorianCalendar input = new GregorianCalendar();
int ordinal = 3;
int weekday = Calendar.SUNDAY;

GregorianCalendar start =
    new GregorianCalendar(input.get(Calendar.YEAR), input.get(Calendar.MONTH), 1);
int dow = start.get(Calendar.DAY_OF_WEEK); // Sun=1, Mon=2, ...
int delta = (weekday - dow);
if (delta < 0) {
    delta += 7;
}
start.add(Calendar.DAY_OF_MONTH, delta + (ordinal - 1) * 7);
String comp1 = sdf.format(input.getTime());
String comp2 = sdf.format(start.getTime());
boolean isThirdSundayInMonth = comp1.equals(comp2);

PlainDate input = 
  SystemClock.inLocalView().today(); // using system timezone
Weekday weekday = Weekday.SUNDAY;

PlainDate adjusted = 
  input.with(PlainDate.WEEKDAY_IN_MONTH.setToThird(weekday));
boolean isThirdSundayInMonth = input.equals(adjusted);

使用

java.util.GregorianCalendar

（旧标准）：

LocalDate input = LocalDate.now(); // using system timezone
int ordinal = 3;
DayOfWeek weekday = DayOfWeek.SUNDAY;

LocalDate adjusted = 
  input.with(TemporalAdjusters.dayOfWeekInMonth(ordinal, weekday));
boolean isThirdSundayInMonth = input.equals(adjusted);

LocalDate input = new LocalDate(); // using system timezone
int ordinal = 3;
int weekday = DateTimeConstants.SUNDAY;

LocalDate start = new LocalDate(input.getYear(), input.getMonthOfYear(), 1);
LocalDate date = start.withDayOfWeek(weekday);
LocalDate adjusted = (
  date.isBefore(start)) 
  ? date.plusWeeks(ordinal) 
  : date.plusWeeks(ordinal - 1);
boolean isThirdSundayInMonth = input.equals(adjusted);

SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
GregorianCalendar input = new GregorianCalendar();
int ordinal = 3;
int weekday = Calendar.SUNDAY;

GregorianCalendar start =
    new GregorianCalendar(input.get(Calendar.YEAR), input.get(Calendar.MONTH), 1);
int dow = start.get(Calendar.DAY_OF_WEEK); // Sun=1, Mon=2, ...
int delta = (weekday - dow);
if (delta < 0) {
    delta += 7;
}
start.add(Calendar.DAY_OF_MONTH, delta + (ordinal - 1) * 7);
String comp1 = sdf.format(input.getTime());
String comp2 = sdf.format(start.getTime());
boolean isThirdSundayInMonth = comp1.equals(comp2);

PlainDate input = 
  SystemClock.inLocalView().today(); // using system timezone
Weekday weekday = Weekday.SUNDAY;

PlainDate adjusted = 
  input.with(PlainDate.WEEKDAY_IN_MONTH.setToThird(weekday));
boolean isThirdSundayInMonth = input.equals(adjusted);

完整概述： 在Java-8（新标准）中：

LocalDate input = LocalDate.now(); // using system timezone
int ordinal = 3;
DayOfWeek weekday = DayOfWeek.SUNDAY;

LocalDate adjusted = 
  input.with(TemporalAdjusters.dayOfWeekInMonth(ordinal, weekday));
boolean isThirdSundayInMonth = input.equals(adjusted);

LocalDate input = new LocalDate(); // using system timezone
int ordinal = 3;
int weekday = DateTimeConstants.SUNDAY;

LocalDate start = new LocalDate(input.getYear(), input.getMonthOfYear(), 1);
LocalDate date = start.withDayOfWeek(weekday);
LocalDate adjusted = (
  date.isBefore(start)) 
  ? date.plusWeeks(ordinal) 
  : date.plusWeeks(ordinal - 1);
boolean isThirdSundayInMonth = input.equals(adjusted);

SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
GregorianCalendar input = new GregorianCalendar();
int ordinal = 3;
int weekday = Calendar.SUNDAY;

GregorianCalendar start =
    new GregorianCalendar(input.get(Calendar.YEAR), input.get(Calendar.MONTH), 1);
int dow = start.get(Calendar.DAY_OF_WEEK); // Sun=1, Mon=2, ...
int delta = (weekday - dow);
if (delta < 0) {
    delta += 7;
}
start.add(Calendar.DAY_OF_MONTH, delta + (ordinal - 1) * 7);
String comp1 = sdf.format(input.getTime());
String comp2 = sdf.format(start.getTime());
boolean isThirdSundayInMonth = comp1.equals(comp2);

PlainDate input = 
  SystemClock.inLocalView().today(); // using system timezone
Weekday weekday = Weekday.SUNDAY;

PlainDate adjusted = 
  input.with(PlainDate.WEEKDAY_IN_MONTH.setToThird(weekday));
boolean isThirdSundayInMonth = input.equals(adjusted);

在Joda时代（流行的第三方库）：

LocalDate input = LocalDate.now(); // using system timezone
int ordinal = 3;
DayOfWeek weekday = DayOfWeek.SUNDAY;

LocalDate adjusted = 
  input.with(TemporalAdjusters.dayOfWeekInMonth(ordinal, weekday));
boolean isThirdSundayInMonth = input.equals(adjusted);

LocalDate input = new LocalDate(); // using system timezone
int ordinal = 3;
int weekday = DateTimeConstants.SUNDAY;

LocalDate start = new LocalDate(input.getYear(), input.getMonthOfYear(), 1);
LocalDate date = start.withDayOfWeek(weekday);
LocalDate adjusted = (
  date.isBefore(start)) 
  ? date.plusWeeks(ordinal) 
  : date.plusWeeks(ordinal - 1);
boolean isThirdSundayInMonth = input.equals(adjusted);

SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
GregorianCalendar input = new GregorianCalendar();
int ordinal = 3;
int weekday = Calendar.SUNDAY;

GregorianCalendar start =
    new GregorianCalendar(input.get(Calendar.YEAR), input.get(Calendar.MONTH), 1);
int dow = start.get(Calendar.DAY_OF_WEEK); // Sun=1, Mon=2, ...
int delta = (weekday - dow);
if (delta < 0) {
    delta += 7;
}
start.add(Calendar.DAY_OF_MONTH, delta + (ordinal - 1) * 7);
String comp1 = sdf.format(input.getTime());
String comp2 = sdf.format(start.getTime());
boolean isThirdSundayInMonth = comp1.equals(comp2);

PlainDate input = 
  SystemClock.inLocalView().today(); // using system timezone
Weekday weekday = Weekday.SUNDAY;

PlainDate adjusted = 
  input.with(PlainDate.WEEKDAY_IN_MONTH.setToThird(weekday));
boolean isThirdSundayInMonth = input.equals(adjusted);

使用

java.util.GregorianCalendar

（旧标准）：

LocalDate input = LocalDate.now(); // using system timezone
int ordinal = 3;
DayOfWeek weekday = DayOfWeek.SUNDAY;

LocalDate adjusted = 
  input.with(TemporalAdjusters.dayOfWeekInMonth(ordinal, weekday));
boolean isThirdSundayInMonth = input.equals(adjusted);

LocalDate input = new LocalDate(); // using system timezone
int ordinal = 3;
int weekday = DateTimeConstants.SUNDAY;

LocalDate start = new LocalDate(input.getYear(), input.getMonthOfYear(), 1);
LocalDate date = start.withDayOfWeek(weekday);
LocalDate adjusted = (
  date.isBefore(start)) 
  ? date.plusWeeks(ordinal) 
  : date.plusWeeks(ordinal - 1);
boolean isThirdSundayInMonth = input.equals(adjusted);

SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
GregorianCalendar input = new GregorianCalendar();
int ordinal = 3;
int weekday = Calendar.SUNDAY;

GregorianCalendar start =
    new GregorianCalendar(input.get(Calendar.YEAR), input.get(Calendar.MONTH), 1);
int dow = start.get(Calendar.DAY_OF_WEEK); // Sun=1, Mon=2, ...
int delta = (weekday - dow);
if (delta < 0) {
    delta += 7;
}
start.add(Calendar.DAY_OF_MONTH, delta + (ordinal - 1) * 7);
String comp1 = sdf.format(input.getTime());
String comp2 = sdf.format(start.getTime());
boolean isThirdSundayInMonth = comp1.equals(comp2);

PlainDate input = 
  SystemClock.inLocalView().today(); // using system timezone
Weekday weekday = Weekday.SUNDAY;

PlainDate adjusted = 
  input.with(PlainDate.WEEKDAY_IN_MONTH.setToThird(weekday));
boolean isThirdSundayInMonth = input.equals(adjusted);

完整概述： 在Java-8（新标准）中：

LocalDate input = LocalDate.now(); // using system timezone
int ordinal = 3;
DayOfWeek weekday = DayOfWeek.SUNDAY;

LocalDate adjusted = 
  input.with(TemporalAdjusters.dayOfWeekInMonth(ordinal, weekday));
boolean isThirdSundayInMonth = input.equals(adjusted);

LocalDate input = new LocalDate(); // using system timezone
int ordinal = 3;
int weekday = DateTimeConstants.SUNDAY;

LocalDate start = new LocalDate(input.getYear(), input.getMonthOfYear(), 1);
LocalDate date = start.withDayOfWeek(weekday);
LocalDate adjusted = (
  date.isBefore(start)) 
  ? date.plusWeeks(ordinal) 
  : date.plusWeeks(ordinal - 1);
boolean isThirdSundayInMonth = input.equals(adjusted);

SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
GregorianCalendar input = new GregorianCalendar();
int ordinal = 3;
int weekday = Calendar.SUNDAY;

GregorianCalendar start =
    new GregorianCalendar(input.get(Calendar.YEAR), input.get(Calendar.MONTH), 1);
int dow = start.get(Calendar.DAY_OF_WEEK); // Sun=1, Mon=2, ...
int delta = (weekday - dow);
if (delta < 0) {
    delta += 7;
}
start.add(Calendar.DAY_OF_MONTH, delta + (ordinal - 1) * 7);
String comp1 = sdf.format(input.getTime());
String comp2 = sdf.format(start.getTime());
boolean isThirdSundayInMonth = comp1.equals(comp2);

PlainDate input = 
  SystemClock.inLocalView().today(); // using system timezone
Weekday weekday = Weekday.SUNDAY;

PlainDate adjusted = 
  input.with(PlainDate.WEEKDAY_IN_MONTH.setToThird(weekday));
boolean isThirdSundayInMonth = input.equals(adjusted);

在Joda时代（流行的第三方库）：

LocalDate input = LocalDate.now(); // using system timezone
int ordinal = 3;
DayOfWeek weekday = DayOfWeek.SUNDAY;

LocalDate adjusted = 
  input.with(TemporalAdjusters.dayOfWeekInMonth(ordinal, weekday));
boolean isThirdSundayInMonth = input.equals(adjusted);

LocalDate input = new LocalDate(); // using system timezone
int ordinal = 3;
int weekday = DateTimeConstants.SUNDAY;

LocalDate start = new LocalDate(input.getYear(), input.getMonthOfYear(), 1);
LocalDate date = start.withDayOfWeek(weekday);
LocalDate adjusted = (
  date.isBefore(start)) 
  ? date.plusWeeks(ordinal) 
  : date.plusWeeks(ordinal - 1);
boolean isThirdSundayInMonth = input.equals(adjusted);

SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
GregorianCalendar input = new GregorianCalendar();
int ordinal = 3;
int weekday = Calendar.SUNDAY;

GregorianCalendar start =
    new GregorianCalendar(input.get(Calendar.YEAR), input.get(Calendar.MONTH), 1);
int dow = start.get(Calendar.DAY_OF_WEEK); // Sun=1, Mon=2, ...
int delta = (weekday - dow);
if (delta < 0) {
    delta += 7;
}
start.add(Calendar.DAY_OF_MONTH, delta + (ordinal - 1) * 7);
String comp1 = sdf.format(input.getTime());
String comp2 = sdf.format(start.getTime());
boolean isThirdSundayInMonth = comp1.equals(comp2);

PlainDate input = 
  SystemClock.inLocalView().today(); // using system timezone
Weekday weekday = Weekday.SUNDAY;

PlainDate adjusted = 
  input.with(PlainDate.WEEKDAY_IN_MONTH.setToThird(weekday));
boolean isThirdSundayInMonth = input.equals(adjusted);

使用

java.util.GregorianCalendar

（旧标准）：

LocalDate input = LocalDate.now(); // using system timezone
int ordinal = 3;
DayOfWeek weekday = DayOfWeek.SUNDAY;

LocalDate adjusted = 
  input.with(TemporalAdjusters.dayOfWeekInMonth(ordinal, weekday));
boolean isThirdSundayInMonth = input.equals(adjusted);

LocalDate input = new LocalDate(); // using system timezone
int ordinal = 3;
int weekday = DateTimeConstants.SUNDAY;

LocalDate start = new LocalDate(input.getYear(), input.getMonthOfYear(), 1);
LocalDate date = start.withDayOfWeek(weekday);
LocalDate adjusted = (
  date.isBefore(start)) 
  ? date.plusWeeks(ordinal) 
  : date.plusWeeks(ordinal - 1);
boolean isThirdSundayInMonth = input.equals(adjusted);

SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
GregorianCalendar input = new GregorianCalendar();
int ordinal = 3;
int weekday = Calendar.SUNDAY;

GregorianCalendar start =
    new GregorianCalendar(input.get(Calendar.YEAR), input.get(Calendar.MONTH), 1);
int dow = start.get(Calendar.DAY_OF_WEEK); // Sun=1, Mon=2, ...
int delta = (weekday - dow);
if (delta < 0) {
    delta += 7;
}
start.add(Calendar.DAY_OF_MONTH, delta + (ordinal - 1) * 7);
String comp1 = sdf.format(input.getTime());
String comp2 = sdf.format(start.getTime());
boolean isThirdSundayInMonth = comp1.equals(comp2);

PlainDate input = 
  SystemClock.inLocalView().today(); // using system timezone
Weekday weekday = Weekday.SUNDAY;

PlainDate adjusted = 
  input.with(PlainDate.WEEKDAY_IN_MONTH.setToThird(weekday));
boolean isThirdSundayInMonth = input.equals(adjusted);

完整概述： 在Java-8（新标准）中：

LocalDate input = LocalDate.now(); // using system timezone
int ordinal = 3;
DayOfWeek weekday = DayOfWeek.SUNDAY;

LocalDate adjusted = 
  input.with(TemporalAdjusters.dayOfWeekInMonth(ordinal, weekday));
boolean isThirdSundayInMonth = input.equals(adjusted);

LocalDate input = new LocalDate(); // using system timezone
int ordinal = 3;
int weekday = DateTimeConstants.SUNDAY;

LocalDate start = new LocalDate(input.getYear(), input.getMonthOfYear(), 1);
LocalDate date = start.withDayOfWeek(weekday);
LocalDate adjusted = (
  date.isBefore(start)) 
  ? date.plusWeeks(ordinal) 
  : date.plusWeeks(ordinal - 1);
boolean isThirdSundayInMonth = input.equals(adjusted);

SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
GregorianCalendar input = new GregorianCalendar();
int ordinal = 3;
int weekday = Calendar.SUNDAY;

GregorianCalendar start =
    new GregorianCalendar(input.get(Calendar.YEAR), input.get(Calendar.MONTH), 1);
int dow = start.get(Calendar.DAY_OF_WEEK); // Sun=1, Mon=2, ...
int delta = (weekday - dow);
if (delta < 0) {
    delta += 7;
}
start.add(Calendar.DAY_OF_MONTH, delta + (ordinal - 1) * 7);
String comp1 = sdf.format(input.getTime());
String comp2 = sdf.format(start.getTime());
boolean isThirdSundayInMonth = comp1.equals(comp2);

PlainDate input = 
  SystemClock.inLocalView().today(); // using system timezone
Weekday weekday = Weekday.SUNDAY;

PlainDate adjusted = 
  input.with(PlainDate.WEEKDAY_IN_MONTH.setToThird(weekday));
boolean isThirdSundayInMonth = input.equals(adjusted);

在Joda时代（流行的第三方库）：

LocalDate input = LocalDate.now(); // using system timezone
int ordinal = 3;
DayOfWeek weekday = DayOfWeek.SUNDAY;

LocalDate adjusted = 
  input.with(TemporalAdjusters.dayOfWeekInMonth(ordinal, weekday));
boolean isThirdSundayInMonth = input.equals(adjusted);

LocalDate input = new LocalDate(); // using system timezone
int ordinal = 3;
int weekday = DateTimeConstants.SUNDAY;

LocalDate start = new LocalDate(input.getYear(), input.getMonthOfYear(), 1);
LocalDate date = start.withDayOfWeek(weekday);
LocalDate adjusted = (
  date.isBefore(start)) 
  ? date.plusWeeks(ordinal) 
  : date.plusWeeks(ordinal - 1);
boolean isThirdSundayInMonth = input.equals(adjusted);

SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
GregorianCalendar input = new GregorianCalendar();
int ordinal = 3;
int weekday = Calendar.SUNDAY;

GregorianCalendar start =
    new GregorianCalendar(input.get(Calendar.YEAR), input.get(Calendar.MONTH), 1);
int dow = start.get(Calendar.DAY_OF_WEEK); // Sun=1, Mon=2, ...
int delta = (weekday - dow);
if (delta < 0) {
    delta += 7;
}
start.add(Calendar.DAY_OF_MONTH, delta + (ordinal - 1) * 7);
String comp1 = sdf.format(input.getTime());
String comp2 = sdf.format(start.getTime());
boolean isThirdSundayInMonth = comp1.equals(comp2);

PlainDate input = 
  SystemClock.inLocalView().today(); // using system timezone
Weekday weekday = Weekday.SUNDAY;

PlainDate adjusted = 
  input.with(PlainDate.WEEKDAY_IN_MONTH.setToThird(weekday));
boolean isThirdSundayInMonth = input.equals(adjusted);

使用

java.util.GregorianCalendar

（旧标准）：

LocalDate input = LocalDate.now(); // using system timezone
int ordinal = 3;
DayOfWeek weekday = DayOfWeek.SUNDAY;

LocalDate adjusted = 
  input.with(TemporalAdjusters.dayOfWeekInMonth(ordinal, weekday));
boolean isThirdSundayInMonth = input.equals(adjusted);

LocalDate input = new LocalDate(); // using system timezone
int ordinal = 3;
int weekday = DateTimeConstants.SUNDAY;

LocalDate start = new LocalDate(input.getYear(), input.getMonthOfYear(), 1);
LocalDate date = start.withDayOfWeek(weekday);
LocalDate adjusted = (
  date.isBefore(start)) 
  ? date.plusWeeks(ordinal) 
  : date.plusWeeks(ordinal - 1);
boolean isThirdSundayInMonth = input.equals(adjusted);

SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
GregorianCalendar input = new GregorianCalendar();
int ordinal = 3;
int weekday = Calendar.SUNDAY;

GregorianCalendar start =
    new GregorianCalendar(input.get(Calendar.YEAR), input.get(Calendar.MONTH), 1);
int dow = start.get(Calendar.DAY_OF_WEEK); // Sun=1, Mon=2, ...
int delta = (weekday - dow);
if (delta < 0) {
    delta += 7;
}
start.add(Calendar.DAY_OF_MONTH, delta + (ordinal - 1) * 7);
String comp1 = sdf.format(input.getTime());
String comp2 = sdf.format(start.getTime());
boolean isThirdSundayInMonth = comp1.equals(comp2);

PlainDate input = 
  SystemClock.inLocalView().today(); // using system timezone
Weekday weekday = Weekday.SUNDAY;

PlainDate adjusted = 
  input.with(PlainDate.WEEKDAY_IN_MONTH.setToThird(weekday));
boolean isThirdSundayInMonth = input.equals(adjusted);

---

试试

java.util.Calendar

也许是java 8的新api或Joda Time，尽管要求一个库实际上被认为是离题的。但问题是“我如何做到这一点，我愿意使用一个额外的库”。这完全是关于SO的话题。@DanielMartin:同意。试试

java.util.Calendar

可能是java 8的新api或Joda Time，尽管要求一个库实际上被认为是离题的。但问题是“我如何做到这一点，我愿意使用额外的库”。这完全是关于SO的话题。@DanielMartin:同意。试试

java.util.Calendar

可能是java 8的新api或Joda Time，尽管要求一个库实际上被认为是离题的。但问题是“我如何做到这一点，我愿意使用额外的库”。这完全是关于SO的话题。@DanielMartin:同意。试试

java.util.Calendar

可能是java 8的新api或Joda Time，尽管要求一个库实际上被认为是离题的。但问题是“我如何做到这一点，我愿意使用额外的库”。DanielMartin：同意。我投了赞成票，但要补充的是，规范库现在是java 8中的

java.time

API，这是一个经过修改的Joda time。我投了赞成票，但要补充的是，规范库现在是java 8中的

java.time

API，这是一个返工的Joda时间。我投了更高的票，但要补充的是，规范库现在是java 8中的

java.Time

API，这是一个返工的Joda时间。我投了更高的票，但要补充的是，规范库现在是java 8中的

java.Time

API，这是一个返工的Joda时间。