Java Month adjustInto()方法
java.time.Month ENUM的adjustInto()方法是Java中的一个内置函数，它接收一个指定日期的Temporal对象，并返回一个与输入的可观察类型相同的新Temporal对象，其中的月份被替换成这个年月。
方法声明 :
public Temporal adjustInto(Temporal temporal)
语法:
Temporal newLocalDate = Month.ANYMONTH.adjustInto(Temporal temporal)
参数 ：该方法以temporal为参数，其中。
temporal – 是要调整的指定日期。ANYMONTH – 是指定的要调整的日期的月份，例如，一月，二月，等等。newLocalDate – 是修改后的日期。返回值 ：该函数返回一个调整后的时间对象，它是根据指定的月份调整的日期。
异常情况
DateTimeException : 如果不可能进行调整，该方法会抛出这个异常。ArithmeticException ：如果发生数字溢出，则抛出此异常。下面的程序说明了上述方法。
程序1 :
import java.time.*;import java.time.Month;import java.time.temporal.Temporal; class DayOfWeekExample { public static void main(String[] args) { // Set a Local Date whose month is found LocalDate localDate1 = LocalDate.of(1947, Month.AUGUST, 15); // Find the month from the Local Date Month monthOfYear1 = Month.from(localDate1); // Printing the Local Date System.out.println(localDate1 + " which is " + monthOfYear1.name()); // Adjust the month to JANUARY from AUGUST Temporal localDate2 = Month.JANUARY .adjustInto(localDate1); // Find the day from the new Local date Month monthOfYear2 = Month.from(localDate2); // Printing the new Local Date System.out.println(localDate2 + " which is " + monthOfYear2.name()); }}
输出。
1947-08-15 which is AUGUST1947-01-15 which is JANUARY
程序2 :
import java.time.*;import java.time.Month;import java.time.temporal.Temporal; class DayOfWeekExample { public static void main(String[] args) { // Set a Local Date whose month is found LocalDate localDate1 = LocalDate.of(2019, Month.MARCH, 18); // Find the month from the Local Date Month monthOfYear1 = Month.from(localDate1); // Printing the Local Date System.out.println(localDate1 + " which is " + monthOfYear1.name()); // Adjust the month to December from March Temporal localDate2 = Month.DECEMBER .adjustInto(localDate1); // Find the day from the new Local date Month monthOfYear2 = Month.from(localDate2); // Printing the new Local Date System.out.println(localDate2 + " which is " + monthOfYear2.name()); }}输出。
2019-03-18 which is MARCH2019-12-18 which is DECEMBER
参考资料 : https://docs.oracle.com/javase/8/docs/api/java/time/Month.html#adjustInto-java.time.temporal.Temporal-
