Java中的ChronoPeriod类的isNegative()方法用于检查期间中的YEAR,MONTH,DAYS三个时间段中的任何一个是否为负。
用法:
boolean isNegative()
参数:此方法不接受任何参数。
返回值:如果给定期间的三值YEAR,MONTHS,DAYS中的任何一个为负,则此方法返回True。否则将返回false。
以下程序说明了Java中的isNegative()方法:
程序1:
// Java code to show the function isNegative()
// to check whether any of the three given units
// YEAR, MONTH, DAY is negative
import java.time.*;
import java.time.chrono.*;
import java.time.temporal.ChronoUnit;
public class ChronoPeriodDemo {
// Function to check if any of the three
// YEAR, MONTH, DAY is negative
static void ifNegative(int year, int months, int days)
{
ChronoPeriod period = Period.of(year, months, days);
System.out.println(period.isNegative());
}
// Driver Code
public static void main(String[] args)
{
int year = -12;
int months = 3;
int days = 31;
ifNegative(year, months, days);
}
}
输出:
true
程序2:
// Java code to show the function isNegative()
// to check whether any of the three given units
// YEAR, MONTH, DAY is negative
import java.time.*;
import java.time.chrono.*;
import java.time.temporal.ChronoUnit;
public class ChronoPeriodDemo {
// Function to check if any of the three
// YEAR, MONTH, DAY is negative
static void ifNegative(int year, int months, int days)
{
ChronoPeriod period = Period.of(year, months, days);
System.out.println(period.isNegative());
}
// Driver Code
public static void main(String[] args)
{
int year = 12;
int months = 3;
int days = 31;
ifNegative(year, months, days);
}
}
输出:
false
参考: https://docs.oracle.com/javase/9/docs/api/java/time/chrono/ChronoPeriod.html#isNegative–
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注:本文由纯净天空筛选整理自srinam大神的英文原创作品 ChronoPeriod isNegative() method in Java with Examples。非经特殊声明,原始代码版权归原作者所有,本译文未经允许或授权,请勿转载或复制。