The isZero() method of ChronoPeriod class in Java is used to check whether all of the three YEAR, MONTH, DAYS in this period are zero.
To check the zero periods, this function is used widely. A zero period is the period where all of the three YEAR, MONTHS and DAYS are zero.
Syntax:
boolean isZero()
Parameters: This method does not accepts any parameter.
Return Value: This method returns a boolean value True if all of the three values YEARS, MONTHS, DAYS for the given period are zero, else this will return False.
Below programs illustrate the above method:
Program 1:
// Java code to show the function isZero()// to check whether all of the three given units// YEAR, MONTH, DAY are zero.  import java.time.*;import java.time.chrono.*;import java.time.temporal.ChronoUnit;  public class ChronoPeriodDemo {      // Function to check if all    // of the three YEAR, MONTH, DAY are zero    static void ifZero(int year, int months, int days)    {        ChronoPeriod period = Period.of(year, months, days);        System.out.println(period.isZero());    }      // Driver Code    public static void main(String[] args)    {          int year = 0;        int months = 0;        int days = 0;          ifZero(year, months, days);    }} |
Output:
true
Program 2:
// Java code to show the function isZero()// to check whether all of the three given units// YEAR, MONTH, DAY are zero.  import java.time.*;import java.time.chrono.*;import java.time.temporal.ChronoUnit;  public class ChronoPeriodDemo {      // Function to check if all    // of the three YEAR, MONTH, DAY are zero    static void ifZero(int year, int months, int days)    {        ChronoPeriod period = Period.of(year, months, days);        System.out.println(period.isZero());    }      // Driver Code    public static void main(String[] args)    {          int year = 0;        int months = 0;        int days = -12;          ifZero(year, months, days);    }} |
Output:
false
Reference: https://docs.oracle.com/javase/9/docs/api/java/time/chrono/ChronoPeriod.html#isZero–
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