Java Calendar method getWeeksInWeekYear() to get number of weeks in the week year

Date

Calendar.getWeeksInWeekYear() Number of weeks in the year .

Returns the number of weeks .
Getting current year ( number of weeks )

package my_proj;
 
import java.util.Calendar;
 
public class my_first {
public static void main(String[] args) {
Calendar my_cal = Calendar.getInstance();// created calendar
System.out.println(my_cal.getWeeksInWeekYear());//52
}
}

For any input year ( Number of weeks )

package my_proj;
 
import java.util.Calendar;
 
public class my_first {
public static void main(String[] args) {
Calendar my_cal = Calendar.getInstance();// created calendar
my_cal.set(2016, 1, 25); // Year, month, date
System.out.println(my_cal.getWeeksInWeekYear());//53
}
}

Using for loop we can check years in a range

package my_proj;
 
import java.util.Calendar;
 
public class my_first {
public static void main(String[] args) {
Calendar my_cal = Calendar.getInstance();// created calendar
my_cal.set(2016, 1, 25); // Year, month, date
System.out.println(my_cal.getWeeksInWeekYear());//53

for (int i=2000; i<2030; i++) {
	 System.out.println(i);
	 my_cal.set(i, 1, 25); // Year, month, date
	 System.out.println(my_cal.getWeeksInWeekYear());//53
}

}
}

We will get number of weeks as 53 for the years 2000, 2005,2011, 2016,2022 & 2028, for other years output will be 52.

By changing first day of week by using setFirstDayOfWeek() we can change the output of getWeeksInWeekYear()

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Calendar.getWeeksInWeekYear()

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