Java中的ChronoPeriod類的isNegative()方法用於檢查期間中的YEAR,MONTH,DAYS三個時間段中的任何一個是否為負。
用法:
boolean isNegative()
參數:此方法不接受任何參數。
返回值:如果給定期間的三值YEAR,MONTHS,DAYS中的任何一個為負,則此方法返回True。否則將返回false。
以下程序說明了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);
}
}
輸出:
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);
}
}
輸出:
false
參考: https://docs.oracle.com/javase/9/docs/api/java/time/chrono/ChronoPeriod.html#isNegative–
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注:本文由純淨天空篩選整理自srinam大神的英文原創作品 ChronoPeriod isNegative() method in Java with Examples。非經特殊聲明,原始代碼版權歸原作者所有,本譯文未經允許或授權,請勿轉載或複製。