Java 中的 LocalDate minusWeeks()方法，示例
原文:https://www . geesforgeks . org/local date-mins weeks-method-in-Java-with-examples/
Java 中一个 LocalDate 类的mins weeks()方法用于从这个 LocalDate 中减去指定的周数，并返回 LocalDate 的副本。例如，2018-12-24 减去一周将导致 2018-12-17。此实例是不可变的，不受此方法调用的影响。
语法:
public LocalDate minusWeeks(long weeksToSubtract)
参数:该方法接受单个参数周减去，代表要减去的周，可以是负数。
返回值:该方法返回基于该日期减去周数的本地日期，不为空。
异常:如果结果超出支持的日期范围，该方法抛出日期时间异常。
以下程序说明了负周()方法:
程序 1:
// 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);
}
}
Output:
LocalDate before subtracting weeks: 2018-12-26
LocalDate after subtracting weeks: 2018-12-12
程序 2:
// 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);
}
}
Output:
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/time/local date . html # mins weeks(长)
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