Java中的 LocalDate minusWeeks() 方法及示例
Java中LocalDate类的minusWeeks()方法用于从这个 LocalDate 中减去指定的周数,并返回一个 LocalDate 的副本。例如,2018-12-24 减去一周将得到 2018-12-17。此实例是不可变的,不受此方法调用的影响。
句法:
public LocalDate minusWeeks(long weeksToSubtract)
参数:此方法接受一个参数weeksToSubtract ,它表示要减去的周数,可能为负数。
返回值:此方法返回基于此日期减去周数的LocalDate ,而不是 null。
异常:如果结果超出支持的日期范围,此方法将引发DateTimeException 。
下面的程序说明了 minusWeeks() 方法:
方案一:
// Java program to demonstrate
// LocalDate.minusWeeks() method
import java.time.*;
public class GFG {
public static void main(String[] args)
{
// create a LocalDate object
LocalDate date
= LocalDate.parse("2018-12-26");
// print instance
System.out.println("LocalDate before"
+ " subtracting weeks: " + date);
// subtract 2 weeks
LocalDate returnvalue
= date.minusWeeks(2);
// print result
System.out.println("LocalDate after "
+ " subtracting weeks: " + returnvalue);
}
}
输出:
LocalDate before subtracting weeks: 2018-12-26
LocalDate after subtracting weeks: 2018-12-12
方案二:
// Java program to demonstrate
// LocalDate.minusWeeks() method
import java.time.*;
public class GFG {
public static void main(String[] args)
{
// create a LocalDate object
LocalDate date
= LocalDate.parse("2018-12-24");
// print instance
System.out.println("LocalDate before"
+ " subtracting weeks: " + date);
// subtract -13 weeks
LocalDate returnvalue
= date.minusWeeks(-13);
// print result
System.out.println("LocalDate after "
+ " subtracting weeks: " + returnvalue);
}
}
输出:
LocalDate before subtracting weeks: 2018-12-24
LocalDate after subtracting weeks: 2019-03-25
参考:
https://docs.oracle.com/javase/10/docs/api/java Java)