凯撒密码 史上最难的问题(呃,这是编程题目的名字,不是真的最难.....)

START
NS BFW, JAJSYX TK NRUTWYFSHJ FWJ YMJ WJXZQY TK YWNANFQ HFZXJX
END
START
N BTZQI WFYMJW GJ KNWXY NS F QNYYQJ NGJWNFS ANQQFLJ YMFS XJHTSI NS WTRJ
END
START
IFSLJW PSTBX KZQQ BJQQ YMFY HFJXFW NX RTWJ IFSLJWTZX YMFS MJ
END
ENDOFINPUT

IN WAR, EVENTS OF IMPORTANCE ARE THE RESULT OF TRIVIAL CAUSES
I WOULD RATHER BE FIRST IN A LITTLE IBERIAN VILLAGE THAN SECOND IN ROME
DANGER KNOWS FULL WELL THAT CAESAR IS MORE DANGEROUS THAN HE

Code:

import java.util.ArrayList;
import java.util.Scanner;

public class Main {

    public static void printPass(ArrayList<String> password) {
        for (int i = 0; i < password.size(); i++) {
            if ("START".equalsIgnoreCase(password.get(i)) || "END".equalsIgnoreCase(password.get(i))) {
                System.out.print("");
            } else {
                System.out.println(translate(password.get(i)));
            }

        }
    }

    public static String translate(String password) {
        char[] ch = password.toCharArray();
        // A 65 V86 U 85 Z 90
        for (int i = 0; i < ch.length; i++) {
            if (ch[i]>='A'&&ch[i]<='Z') {
                if ((char) (ch[i] - 5) < 'A') {
                    ch[i] = (char) (ch[i] + 21);
                } else {
                    ch[i] = (char) (ch[i] - 5);
                }
            }
        }
        return new String(ch);
    }

    public static void main(String[] args) {
        Scanner cin = new Scanner(System.in);
        String password = "";
        ArrayList<String> pass = new ArrayList<String>();
        while (cin.hasNext()) {
            password = cin.nextLine();
            if ("ENDOFINPUT".equalsIgnoreCase(password)) {
                printPass(pass);
            } else {
                pass.add(password);
            }
        }
    }
}

注:在ACM提交Code的时候,类名必须为Main,否则编译不通过.