Java 在检查数组时遇到问题

我应该在一个字符数组中搜索另一个字符数组。我遇到的问题是，我应该检查单词是否匹配。此外，当搜索词比原始字符串长时，我不断得到一个越界异常

public int indexOf(String parameter) { //does same thing as previous method but with a String instead
    int index = -1;
    char charArray[] = parameter.toCharArray();
    int counter = 0;

    for (int i = 0; i < indexArray.length; i++) { //goes through the array and find which array element is = to the char

        if (indexArray[i] == charArray[0]) { //checks if the index is equal to the first AND second letter of the word

            for (int j = i; j < charArray.length; j++) {
                if (indexArray[j] == charArray[j]) {// this is where the Exception java.lang.ArrayIndexOutOfBoundsException: 14 error happens
                    counter++;
                }

                if (counter == charArray.length) {
                    index = i;
                    return index;
                }

            }
        }


    }
    return index;
}

charArray

是搜索词的数组。 索引数组是原始字符串的字符数组

public int indexOf(String parameter) { //does same thing as previous method but with a String instead
    int index = -1;
    char charArray[] = parameter.toCharArray();
    int counter = 0;

    for (int i = 0; i < indexArray.length; i++) { //goes through the array and find which array element is = to the char

        if (indexArray[i] == charArray[0]) { //checks if the index is equal to the first AND second letter of the word

            for (int j = i; j < charArray.length; j++) {
                if (indexArray[j] == charArray[j]) {// this is where the Exception java.lang.ArrayIndexOutOfBoundsException: 14 error happens
                    counter++;
                }

                if (counter == charArray.length) {
                    index = i;
                    return index;
                }

            }
        }


    }
    return index;
}

public int indexOf（String参数）{//执行与前面方法相同的操作，但使用的是字符串
int指数=-1；
char charArray[]=parameter.toCharArray（）；
int计数器=0；
for（inti=0；i

说出indexArray是“葡萄”还是charArray是“菠萝”。在

i=3

，

indexArray[i]==charArray[0]

返回true。现在设置

j=3

并检查直到

j<9

，显然

indexArray[j]

会给您一个

ArrayIndexOutOfBoundsException

您应该将其更改为：

// There is no point to check indices that the subsequent string is shorter than the search string.
for (int i = 0; i < indexArray.length - charArray.length; i++) { 
    if (indexArray[i] == charArray[0]) {
        for (int j = 0; j < charArray.length; j++) {
            if (indexArray[i + j] == charArray[j]) {
                // ...
            }
        }
    }
}

//没有必要检查后续字符串是否比搜索字符串短。
对于（inti=0；i

Post stacktrace of.exception，以及在线程“main”java.lang.ArrayIndexOutOfBoundsException中抛出exceptionException的字符串：14完整stacktrace及其引用的行。线程“main”java.lang.ArrayIndexOutOfBoundsException中的异常：14位于MyString.indexOf（MyString.java:53）位于MyString.startsWith（MyString.java:74）mainsignment7.searchString（mainsignment7.java:108）和mainsignment7.main（mainsignment7.java:70）