《java语言程序设计》泽勒一致性问题

import java.util.Scanner;

/**
* Created by longforus on 4:52 PM 5/8/2016 .
* IDEA-Test .
*/
public class Chapter3_21 {
public static void main (String[] args) {
Scanner in = new Scanner(System.in);
System.out.println ("Enter year:(e.g., 2008):");
int year = in.nextInt ();
System.out.println ("Enter month : 1-12 :");
int month = in.nextInt ();
System.out.println ("Enter the day of the month : 1-31 :");
int day = in.nextInt ();
switch (month){
case 1:month = 13;
year--;
break;
case 2:month = 14;
year--;
break;
}
int j = Math.abs (year/100),k = year%100;
int h = (day+(int)(26*(month+1)/10)+k+(int)(k/4)+(int)(j/4)+5*j)%7;
String dayOfweek = null;
switch (h){
case 2:dayOfweek = "Monday";
break;
case 3:dayOfweek = "Tuesday";
break;
case 4:dayOfweek = "Wednesday";
break;
case 5:dayOfweek = "Thursday";
break;
case 6:dayOfweek = "Friday";
break;
case 0:dayOfweek = "Saturday";
break;
case 1:dayOfweek = "Sunday";
break;
}
System.out.println ("Day of the week is "+dayOfweek);
}
}