Java纵横字谜2d数组 包分配2； 导入java.util.Random； 导入java.util.Scanner； 公共类test2{ 公共静态void main（字符串[]args）{ int-wordAmount=wordAmount（）； String[]words=wordArray（wordAmount）； 显示单词（单词、单词数量）； char[][]puzzleGrid=generatePuzzleGrid（words，wordAmount）； //System.out.println（Arrays.deepToString（拼图网格））；//只需使用它来测试 打印拼图网格（拼图网格，字数）； } 公共静态int-wordAmount（）{ 扫描仪输入=新扫描仪（System.in）； System.out.print（“您希望在单词搜索（5-15）中输入多少单词）：”； int wordAmount=input.nextInt（）； 而（字数20）{ System.out.println（“您请求的数字要么太大，要么太小。”）； System.out.print（“您希望在单词搜索中输入多少单词（5-20）：”； wordAmount=input.nextInt（）； } 返回字数； } 公共静态字符串[]字数组（int-wordAmount）{ String[]words=新字符串[wordAmount]； 扫描仪输入=新扫描仪（System.in）； for（int i=0；i

看来我上一个问题已经解决了，但现在我面临一个新问题

错误：线程“main”java.lang.ArrayIndexOutOfBoundsException中出现异常：5 在assignment2.test2.generatePuzzleGrid处（test2.java:63） 位于assignment2.test2.main（test2.java:10） C:\Users\Higle\AppData\Local\NetBeans\Cache\8.2\executor snippets\run.xml:53:Java返回：1

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生成失败（总时间：9秒）

看起来您正在使用少于5个字符的字符串调用charAt（5）。你可以这样做

package assignment2;
import java.util.Random;
import java.util.Scanner;

public class test2 {
public static void main(String[] args) {
    int wordAmount = wordAmount();
    String[] words = wordArray(wordAmount);
    displayWords(words, wordAmount);
    char[][] puzzleGrid = generatePuzzleGrid(words, wordAmount);
    //System.out.println(Arrays.deepToString(puzzleGrid)); //just using this to test
    printPuzzleGrid(puzzleGrid, wordAmount);
}

public static int wordAmount(){
    Scanner input = new Scanner(System.in);
    System.out.print("How many words would you like in the word search(5-15): ");
    int wordAmount = input.nextInt();
    while(wordAmount < 5 || wordAmount > 20){
        System.out.println("The number you've requested is either to large or to small.");
        System.out.print("How many words would you like in the word search(5-20): ");
        wordAmount = input.nextInt();
    }
    return wordAmount;
}

public static String[] wordArray(int wordAmount){
    String[] words = new String[wordAmount];
    Scanner input = new Scanner(System.in);
    for(int i = 0; i < wordAmount; i++){
        System.out.print("Enter a word: ");
        words[i] = (input.nextLine().toUpperCase());
        for(int j = 0; j < wordAmount; j++){
            if(j == i) break;
            while(words[i].contains(words[j])){
                System.out.print("The word you entered has already been entered, enter a new word: ");
                words[i] = (input.nextLine().toUpperCase());
            }
        }
        while(words[i].length() > 10 || words[i].length() <= 2 || words[i].contains(" ")){
            System.out.print("The word you entered has been rejected, enter a new word: ");
            words[i] = (input.nextLine().toUpperCase());
        }
    }
    return words;
}

public static void displayWords(String[] words, int wordAmount){
    System.out.print("The words you must find are: ");
    for(int w = 0; w < wordAmount; w++){
        System.out.print(words[w] + "  ");
    }
    System.out.println("");
}

public static char[][] generatePuzzleGrid(String[] words, int wordAmount){
    char[][] puzzleGrid = new char[wordAmount][wordAmount];
    Random rand = new Random();
    for(int across = 0; across < wordAmount; across++){
        for(int down = 0; down < words[across].length(); down++){
            puzzleGrid[across][down] = words[across].charAt(down);
            for(int filler = wordAmount; filler >= words[across].length(); filler--){
                puzzleGrid[across][filler] = (char)(rand.nextInt(26) + 'A'); //this is the line with the problem
            }
        }
    }
    return puzzleGrid;
}

public static void printPuzzleGrid(char[][] puzzleGrid, int wordAmount){
    for(int across = 0; across < wordAmount; across++){
        for(int down = 0; down < wordAmount; down++){
            System.out.print(" " + puzzleGrid[down][across]);
        }
        System.out.println("");
    }
}    
}

if（单词[cross].length（）<（down-1））{
继续；
}

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为了确保你不会犯那个特别的错误。。。另外，您可能想知道charAt（）从0->length（）-1返回字符的索引，应用程序运行时不会出现任何问题。唯一的问题是，如果用户提供的单词数量（网格中的字符数）大于他提供的单词数量，会发生什么情况。因此，最好使用单词长度对wordAmount进行验证，如下所示

if(words[across].length() < (down-1)){ 
    continue;
}

publicstaticchar[]generatePuzzleGrid（字符串[]个字，int-wordAmount）{
如果（单词数量>单词长度）{
wordAmount=words.length；
}
char[][]拼图网格=新字符[wordAmount][wordAmount]；
for（int-cross=0；cross

您能解释一下

wordAmount

和

words

到底是什么，以及您在内部循环中试图实现什么吗？当您询问异常时，请始终发布准确完整的堆栈跟踪。它确切地告诉我们异常是什么，以及它是从哪个代码抛出的。您是否阅读了ArrayIndexOutOfBoundsException的文档？您是否使用调试器来找出它的来源？您正在尝试访问[跨]的单词。单词是否包含足够的元素？wordAmount是从用户处获得的整数，words是从用户处获得的字符串数组。什么可以防止单词从网格的右边缘跑掉？当您获得此异常（word和wordAmount值）时，您传递了哪些参数？否。这将抛出StringIndexOutOfBoundsException。

public static char[][] generatePuzzleGrid(String[] words, int wordAmount) {
    if(wordAmount>words.length){
        wordAmount = words.length;
    }
    char[][] puzzleGrid = new char[wordAmount][wordAmount];
    for (int across = 0; across < wordAmount; across++) {
        for (int down = 0; down < words[across].length(); down++) {
            puzzleGrid[across][down] = words[across].charAt(down);/////////////////
        }
    }
    return puzzleGrid;
}