字符串中的无效字符

Question

我正在尝试将包含连字符和下划线的字符串输入运行sform 成驼峰式大小写。

示例：

the-stealth-warrior

应该变成

theStealthWarrior

我以为我完全理解了这个问题，直到我运行在我运行代码时遇到一些奇怪的无效输出问题。

我的代码：

public class Application {
    public static void main(String[] args) {
        System.out.println(toCamelCase("the-stealth-warrior"));
    }

    public static String toCamelCase(String s) {
        int sLength = s.length();

        char[] camelCaseWord = new char[sLength];
        int camelCaseIndex = 0;

        for (int i = 0; i < sLength; i++) {
            if (s.charAt(i) == '-' || s.charAt(i) == '_') {
                char upper = Character.toUpperCase(s.charAt(i + 1));
                camelCaseWord[camelCaseIndex] = upper;
                camelCaseIndex++;
                i++;
            } else {
                camelCaseWord[i] = s.charAt(i);
                camelCaseIndex++;
            }
        }
        return new String(camelCaseWord);
    }
}

我的输出：

theS tealtW  arrior

有谁知道可能是什么问题？谢谢

Answer 1

改为

camelCaseWord[camelCaseIndex] = s.charAt(i);

你也应该检查这个

char upper = Character.toUpperCase(s.charAt(i + 1));

确保在连字符或下划线位于字符串末尾的情况下不超过字符串的边界

Answer 2

你也可以这样做（我认为它不那么复杂）：

   private static void covertToCamelCase(String s) {
    String camelCaseString = "";
    for(int i = 0; i < s.length(); i++){
        if(s.charAt(i) == '_' || s.charAt(i) == '-'){
            
            // if  hyphen or underscore is at the beggining
            if(i == 0) {
                camelCaseString += s.toLowerCase().charAt(i+1);
            }  // if  hyphen or underscore is at the end
            else if(i != s.length()-1) {
                camelCaseString += s.toUpperCase().charAt(i + 1);
            }

            i++;
        }else{
            camelCaseString += s.charAt(i);
        }
    }

    System.out.println(camelCaseString);
}

当你运行代码

 public static void main(String[] args) {
    covertToCamelCase("test_test");
    covertToCamelCase("some-new-string-word");
    covertToCamelCase("hyphen-at-end-");
    covertToCamelCase("-hyphen-at-beginning-");
}

输出将是：

testTest
someNewStringWord
hyphenAtEnd
hyphenAtBeginning

字符串中的无效字符

Invalid characters in String

java

arrays

string

indexoutofboundsexception