Need help implementing this Java class

(Science: day of the week) Zeller's congruence is an algorithm developed by Christian Zeller to calculate the day of the week. The formula is h = (q + (26 * (m + 1)) / 10 + k + k / 4 + j / 4 + 5 * j) % 7 where

h is the day of the week (0: Saturday, 1: Sunday, 2: Monday, 3: Tuesday, 4: Wednesday, 5: Thursday, 6: Friday).

q is the day of the month.

m is the month (3: March, 4: April, ..., 12: December). January and February are counted as months 13 and 14 of the previous year.

j is the century (i.e., year/100).

k is the year of the century (i.e., year%100).

Note that the division in the formula performs an integer division. Write a program that prompts the user to enter a year, month, and day of the month, and displays the name of the day of the week. Here are some sample runs:

Enter year (e.g., 2012): 2015 Enter month (1-12): 1 Enter the day of the month (1-31): 25 Day of the week is Sunday!

and

Enter year (e.g., 2012): 2012 Enter month (1-12): 5 Enter the day of the month (1-31): 12 Day of the week is Saturday!