Question

我正在构建一个程序，我必须逐字扫描文档，解析这些单词以删除非法字符，然后将每个单词分配给哈希映射。为此，我将单词中的每个字母添加到字符arraylist中，然后使用增强的for循环将该arraylist转换为数组，然后将该数组转换为String。问题是，每当我尝试使用我的数组列表的大小初始化字符数组时，它会抛出一个可能的精度损失错误，并且似乎要我输入值作为字符而不是整数。如何解决此问题并使我的阵列工作？请帮忙！

  while ( in .hasNext()) {
    String input = in .next();
    Scanner characterizer = new Scanner(input);
    characterizer.useDelimiter("");
    int counter = 0;

    ArrayList < Character > placeHolder = new ArrayList < Character > ();

    while (counter < input.length()) {
        char character = characterizer.next().charAt(counter);
        if (character != '(' && character != ')' && character != '.' && character != '-' && character != '$' && character != '?' & character != '!' && character != ';' && character != ':' && character != '"' && character != '&' && character != '#' && character != '*') {
            placeHolder.add(character);
        }
        counter++;
    }
    final int LENGTH = placeHolder.size();
    char[] word = new char[] {
        LENGTH
    };
    //this code will used the enhanced for loop to copy the contents of placeHolder into word and then convert it to a string
  }

Answer 1

您正在以错误的方式初始化char数组。

char[] word = new char[LENGTH];

花括号用于数组的内容。

初始化字符数组时丢失精度错误

1 个答案: