Java LocalDate类| minusWeeks（）方法与示例

LocalDate类minusWeeks()方法 (LocalDate Class minusWeeks() method)

minusWeeks() method is available in java.time package.
minusWeeks()方法在java.time包中可用。
minusWeeks() method is used to subtract the given weeks from this LocalDate and return the LocalDate.
minusWeeks()方法用于从此LocalDate中减去给定的星期并返回LocalDate。
minusWeeks() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.
minusWeeks()方法是一种非静态方法，只能通过类对象访问，如果尝试使用类名称访问该方法，则会收到错误消息。
minusWeeks() method may throw an exception at the time of performing subtraction.
minusWeeks()方法在执行减法时可能会引发异常。

DateTimeException: This exception may throw when the calculated result value exceeds the limit.
DateTimeException ：当计算结果值超出限制时，可能引发此异常。

Syntax:

句法：

    public LocalDate minusWeeks(long weeks_val);

Parameter(s):

参数：

long weeks_val – represents the weeks to be subtracted from this LocalDate.
long week_val –表示要从此LocalDate中减去的周数。

Return value:

返回值：

The return type of this method is LocalDate, it returns the LocalDate that holds the value subtracted the given weeks from this LocalDate.

此方法的返回类型为LocalDate ，它返回LocalDate，该LocalDate保留从此LocalDate中减去给定周数的值。

Example:

例：

// Java program to demonstrate the example 
// of minusWeeks(long weeks_val) method 
// of LocalDate
import java.time.*;
public class MinusWeeksOfLocalDate {
public static void main(String args[]) {
long weeks = 3;
// Instantiates two LocalDate
LocalDate l_da1 = LocalDate.parse("2007-04-04");
LocalDate l_da2 = LocalDate.of(2008, Month.FEBRUARY, 06);
// Display l_da1,l_da2 and weeks
System.out.println("LocalDate l_da1, l_da2: ");
System.out.println("l_da1: " + l_da1);
System.out.println("l_da2: " + l_da2);
System.out.println("weeks to subtract: " + weeks);
System.out.println();
// Here, this method subtracts the
// given weeks from this date l_da1
// i.e. here we are subtracting 3
// weeks from the date l_da1
LocalDate minus_weeks = l_da1.minusWeeks(weeks);
// Display minus_weeks
System.out.println("l_da1.minusWeeks(weeks): " + minus_weeks);
// Here, this method subtracts the 
// given weeks from this date l_da2
// i.e. here we are subtracting 3
// weeks from the date l_da2
minus_weeks = l_da2.minusWeeks(weeks);
// Display minus_weeks
System.out.println("l_da2.minusWeeks(weeks): " + minus_weeks);
}
}

Output

输出量

LocalDate l_da1, l_da2: 
l_da1: 2007-04-04
l_da2: 2008-02-06
weeks to subtract: 3l_da1.minusWeeks(weeks): 2007-03-14
l_da2.minusWeeks(weeks): 2008-01-16