Java中的 LocalDate plusWeeks() 方法及示例
Java中LocalDate类的plusWeeks()方法用于在这个LocalDate中加上指定的周数,并返回一个LocalDate的副本。例如,2018-12-24加一周会得到2018-12-31。此实例是不可变的,不受此方法调用的影响。
句法:
public LocalDate plusWeeks(long weeksToAdd)
参数:此方法接受单个参数weekToAdd ,它表示要添加的周数,可能为负数。
返回值:此方法基于此日期返回一个LocalDate并添加周数,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 plusWeeks() 方法:
方案一:
// Java program to demonstrate
// LocalDate.plusWeeks() 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"
+ " adding weeks: " + date);
// add 5 weeks
LocalDate returnvalue
= date.plusWeeks(5);
// print result
System.out.println("LocalDate after "
+ " adding weeks: " + returnvalue);
}
}
输出:
LocalDate before adding weeks: 2018-12-26
LocalDate after adding weeks: 2019-01-30
方案二:
// Java program to demonstrate
// LocalDate.plusWeeks() 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"
+ " adding weeks: " + date);
// add -3 weeks
LocalDate returnvalue
= date.plusWeeks(-3);
// print result
System.out.println("LocalDate after "
+ " adding weeks: " + returnvalue);
}
}
输出:
LocalDate before adding weeks: 2018-12-24
LocalDate after adding weeks: 2018-12-03
参考 :
https://docs.oracle.com/javase/10/docs/api/java Java)