Java - ArrayOutOfBoundsException帮助我 [英] Java - ArrayOutOfBoundsException help me

问题描述

  import java.util。*; 
 
 import java.util.Arrays; 
 
 public class ScoreCalc {
 
 public static void main（String [] args）{
 Scanner in = new Scanner（System.in）; 
 char [] alphabet = {'a'，'b'，'c'，'d'，'e'，'f'，'g'，'h'，'i'，'j' 'k'，'l'，'m'，'n'，'o'，'p'，'q'，'r'，'s'，'t'，'u'，'v' '，'x'，'y'，'z'}; 
 int [] score = {1,3,3,2,1,4,2,4,1,8,5,1,3,1,1,3,10,1,1,1， 1,4,4,8,4,10}; 
 System.out.println（Enter word：）; 
 String word = in.nextLine（）; 
 int totalScore = 0; 
 char [] wordArray = word.toCharArray（）; 
 for（int i = 0; i< wordArray.length; i ++）{
 System.out.println（wordArray [i]）; 
 int index = Arrays.asList（alphabet）.indexOf（wordArray [i]）; 
 System.out.println（index）; 
 totalScore = totalScore + score [index]; 
} 
 System.out.println（totalScore）; 
} 
} 
  

java.lang.ArrayIndexOutOfBoundsException：-1

因为它找不到数组字母表中的任何字符，有人可以帮助plz！

解决方案

indexOf（wordArray [i]）正在返回-1。我怀疑这是由于大写字母和/或特殊字符。首先执行此操作并添加错误检查：

  word.toLowerCase（）。toCharArray（）
  
 
 
 
无论如何，我会做这样的事情，因为它更干净：
  String alphabet =abcdefghijklmnopqrstuvwxyz; 
  
，然后
 code> int index = alphabet.indexOf（wordArray [i]）; 
 if（index == -1）{
 //处理特殊字符
} else {
 totalScore + = score [index]; 
} 
  
 
import java.util.*;

import java.util.Arrays;

public class ScoreCalc {

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        char[] alphabet = {'a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z'};
        int[] score = {1,3,3,2,1,4,2,4,1,8,5,1,3,1,1,3,10,1,1,1,1,4,4,8,4,10};
        System.out.println("Enter word: ");
        String word = in.nextLine();
        int totalScore = 0;
        char[] wordArray = word.toCharArray();
        for(int i=0; i<wordArray.length; i++) {
            System.out.println(wordArray[i]);
            int index = Arrays.asList(alphabet).indexOf(wordArray[i]);
            System.out.println(index);
            totalScore = totalScore + score[index];
        }
        System.out.println(totalScore);
    }
}
This keeps coming up with Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: -1

Because it can't find any of the characters in the array alphabet can someone help plz!
解决方案
indexOf(wordArray[i]) is returning -1. I suspect this is due to uppercase letters and/or special characters. Do this first and add error checking:
word.toLowerCase().toCharArray()
Regardless, I would do something like this instead as it's much cleaner:
String alphabet = "abcdefghijklmnopqrstuvwxyz";
and then
int index = alphabet.indexOf(wordArray[i]);
if(index == -1) {
    // handle the special character
} else {
    totalScore += score[index];
}


                        
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