输入年、月、日，计算其为星期几

/*Enter year:(e.g., 2012): 2015Enter month: 1-12: 1Enter the day of the month: 1-31: 25Day of the week is Sunday.Enter year:(e.g., 2012): 2012Enter month: 1-12: 5Enter the day of the month: 1-31: 12Day of the week is Saturday.*/import java.util.Scanner;public class DayOfTheWeek {    public static void main (String[] args) {        Scanner input = new Scanner(System.in);        int h, q, m, j, k;        /******************************************************         * h: is the day of the week.         * q: is the day of month.         * m: is the month.         * j: is the century.         * k: is the year of the century.         ******************************************************/        System.out.print("Enter year:(e.g., 2012): ");        j = input.nextInt();                System.out.print("Enter month: 1-12: ");        m = input.nextInt();        if (m == 1 || m == 2) {            if (m == 1)                 m = 13;            else                m = 14;            k = (j - 1) % 100;            j /= 100;        }        else {            k = j % 100;            j /= 100;        }           System.out.print("Enter the day of the month: 1-31: ");        q = input.nextInt();        h = (q + 26 * (m + 1) / 10 + k + k / 4 + j / 4 + 5 * j) % 7;        System.out.print("Day of the week is ");        switch (h) {            case 0: System.out.println("Saturday.");  break;            case 1: System.out.println("Sunday.");  break;            case 2: System.out.println("Monday.");  break;            case 3: System.out.println("Tuesday."); break;            case 4: System.out.println("Wednesday.");   break;            case 5: System.out.println("Thursday.");    break;            case 6: System.out.println("Friday.");  break;        }    }}