Java Period isNegative()方法及示例

来源：这里教程网时间：2026-02-17 21:05:41 作者：

Java Period isNegative()方法及示例

Java中Period类的isNegative()方法用于检查周期中的YEAR, MONTH, DAYS三者是否为负数。

语法

public boolean isNegative()

参数： 该方法不接受任何参数。

返回值： 如果给定时期的年、月、日三个数值中的任何一个为负值，则该方法返回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.Period;import java.time.temporal.ChronoUnit;  public class PeriodDemo {      // Function to check if any of the three     // YEAR, MONTH, DAY is negative    static void ifNegative(int year, int months, int days)    {        Period 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.Period;import java.time.temporal.ChronoUnit;  public class PeriodDemo {      // Function to check if any of the three    // YEAR, MONTH, DAY is negative    static void ifNegative(int year, int months, int days)    {        Period 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: