ChronoPeriod isNegative() method in Java with Examples

Last Updated : 27 Jun, 2019
The isNegative() method of ChronoPeriod class in Java is used to check whether any of the three YEAR, MONTH, DAYS in period is negative or not. Syntax: 
boolean isNegative()
Parameters: This method does not accepts any parameter. Return Value: This method returns True if any of the three-valued YEARs, MONTHS, DAYS for the given period is negative, else this will return false. Below programs illustrate the isNegative() method in Java: Program 1: Java 
// 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);
    }
}
Output: 
true
Program 2: Java 
// 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);
    }
}
Output: 
false
Reference: https://docs.oracle.com/javase/9/docs/api/java/time/chrono/ChronoPeriod.html#isNegative--
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