Java programming that can count Friday the 13th?

Answer 1

To count the occurrences of Friday the 13th in Java, you can use the java.time package. You can loop through the desired range of years and months, checking if the 13th day of each month falls on a Friday. Here's a simple example:

import java.time.LocalDate;
import java.time.DayOfWeek;

public class FridayThe13thCounter {
    public static void main(String[] args) {
        int count = 0;
        for (int year = 1900; year <= 2100; year++) {
            for (int month = 1; month <= 12; month++) {
                LocalDate date = LocalDate.of(year, month, 13);
                if (date.getDayOfWeek() == DayOfWeek.FRIDAY) {
                    count++;
                }
            }
        }
        System.out.println("Number of Friday the 13ths: " + count);
    }
}

This program counts and prints the number of Friday the 13ths from the year 1900 to 2100.