java - 我不断收到 'Exception in thread "main"java.lang.ArrayIndexOutOfBoundsException : 30?

Question

这是一个附加类，当我使用 Eclipse 编译器时它工作得很好。但由于某种原因，当我将其输入 edhesive 的编译器时，错误不断弹出。

import java.util.Scanner;

class Main {

    public static void main(String[] args) {

        Scanner scan = new Scanner(System.in);

        System.out.println("What month were you born in? (number)");
        int month = scan.nextInt();

        System.out.println("What day? (number)");
        int day = scan.nextInt();

        String[] arrayM = {
                "January", "February", "March", "April", "June", "July", "August", "September", "October", "November", "December"
        };
        String[] arrayD = {
                "first", "second", "third", "fourth", "fifth", "sixth", "seventh", "eight", "ninth", "tenth", "eleventh", "twelvth", "thirteenth",
                "fourteenth", "fifteenth", "sixteenth", "seventeenth", "eighteenth", "nineteenth", "twentieth", "twenty-first",
                "twenty-second", "twenty-third", "twenty-fourth", "twenty-fifth", "twenty-sixth", "twenty-seventh",
                "twenty-ninth", "thirtieth", "thirty-first"
        };

        System.out.println("Your birthday is: " + arrayM[month - 1] + " " + arrayD[day - 1]);

        if (month == 1) {
            if (day >= 1 && day <= 19)
                System.out.println("Capricorn");
            else if (day >= 20 && day <= 31)
                System.out.println("Aquarius");
        } else if (month == 2) {
            if (day >= 1 && day <= 18)
                System.out.println("Aquarius");
            else if (day >= 19 && day <= 31)
                System.out.println("Pisces");
        } else if (month == 3) {
            if (day >= 1 && day <= 20)
                System.out.println("Pisces");
            else if (day >= 21 && day <= 31)
                System.out.println("Aries");
        } else if (month == 4) {
            if (day >= 1 && day <= 21)
                System.out.println("Aries");
            else if (day >= 22 && day <= 31)
                System.out.println("Taurus");
        } else if (month == 5) {
            if (day >= 1 && day <= 20)
                System.out.println("Taurus");
            else if (day >= 21 && day <= 31) ;
            System.out.println("Gemini");
        } else if (month == 6) {
            if (day >= 1 && day <= 20)
                System.out.println("Gemini");
            else if (day >= 21 && day <= 31)
                System.out.println("Cancer");
        } else if (month == 7) {
            if (day >= 1 && day <= 22)
                System.out.println("Gemini");
            else if (day >= 23 && day <= 31)
                System.out.println("Leo");
        } else if (month == 8) {
            if (day >= 1 && day <= 22)
                System.out.println("Leo");
            else if (day >= 23 && day <= 31)
                System.out.println("Virgo");
        } else if (month == 9) {
            if (day >= 1 && day <= 22)
                System.out.println("Virgo");
            else if (day >= 1 && day <= 31)
                System.out.println("Libra");
        } else if (month == 10) {
            if (day >= 1 && day <= 22)
                System.out.println("Libra");
            else if (day >= 23 && day <= 31)
                System.out.println("Scorpio");
        } else if (month == 11) {
            if (day >= 1 && day <= 21)
                System.out.println("Scorpio");
            else if (day <= 22 && day <= 31)
                System.out.println("Sagittarius");
        } else if (month == 12) {
            if (day >= 1 && day <= 21)
                System.out.println("Sagittarius");
            else if (day >= 22 && day <= 31)
                System.out.println("Capricorn");
        } else {
            System.out.println("error");
        }


    }
}

Answer 1

看起来 arrayD 中缺少“twenty-eighth”，因此只有 30 个元素。