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 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 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–
