The isNegative() method of Period class in Java is used to check whether any of the three YEAR, MONTH, DAYS in period is negative or not.
Syntax:
public 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.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);    }} |
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.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);    }} |
Output:
false
Reference: https://docs.oracle.com/javase/8/docs/api/java/time/Period.html#isNegative–
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