Question

我正在尝试编写接收单词并将其字母存储在多维数组中的代码。现在，我得到一个数组索引超出范围的异常，我不知道为什么。我正在使用以下输入进行测试：

2
SEND
MORE
MONEY

（我只想在阵列中输入'SEND'和'MORE'的字母。）

我在指示的行处得到一个ArrayIndexOutOfBoundsException：2。这是我的代码：

Scanner keyboard = new Scanner(System.in);
int n = keyboard.nextInt();
keyboard.nextLine();
String[] addends = new String[n];
for (int i = 0; i < n; i++) {
    addends[i] = keyboard.nextLine();
}
String sum = keyboard.nextLine();

int maxWordLength = 0;
for (int i = 0; i < n; i++)
    if (addends[i].length() > maxWordLength)
        maxWordLength = addends[i].length();

char[][] letters = new char[maxWordLength][n];
for (int i = 0; i < n; i++) 
    for (int j = 0; j < addends[i].length(); j++)
        letters[i][j] = addends[i].charAt(j);       //Getting exception here.

//Test that letters were added correctly
for (int i = 0; i < n; i++)
    for (int j = 0; j < addends[i].length(); j++)
        System.out.print(letters[i][j]);

Answer 1

char[][] letters = new char[maxWordLength][n];
for (int i = 0; i < n; i++) 
    for (int j = 0; j < addends[i].length(); j++)
        letters[i][j] = addends[i].charAt(j);

通过检查显而易见，第一行应该是

char[][] letters = new char[n][maxWordLength];

或者您在以下循环中混淆了i和j。

Answer 2

char[][] letters = new char[maxWordLength][n];
for (int i = 0; i < n; i++) 
    for (int j = 0; j < addends[i].length(); j++)
        letters[i][j] = addends[i].charAt(j);

你对i和j的条件不匹配;我应该停在加数[i] .length（）和j应该停止

Java - 我的ArrayIndexOutOfBoundsException来自哪里？

2 个答案: