java - 无法读取重复字符

Question

我正在编写代码来读取字符串并计算重复组

public int countRepeatedCharacters()
{
    int c = 0;
    for (int i = 1; i < word.length() - 1; i++)
    {
        if (word.charAt(i) == word.charAt(i + 1)) // found a repetition
        {
            if ( word.charAt(i - 1) != word.charAt(i)) {

                c++;

            }
        }
    }     
    return c;
}

如果我尝试输入 aabbcdaaaabb 我应该有 4 组重复小数 啊| BB |啊啊| BB

我知道我没有读取第一组 aa，因为我的索引从 1 开始。我尝试将其修复为读取零，但随后我尝试修复整个循环以处理更改，但我失败了，是吗？关于如何更改索引或循环有什么建议吗？

Answer 1

试试这个代码:

public int countRepeatedCharacters(String word)
{
    int c = 0;
    Character last = null;
    bool counted = false;
    for (int i = 0; i < word.length(); i++)
    {
        if (last != null && last.equals(word.charAt(i))) {  // same as previous characted
            if (!counted) {  // if not counted this character yet, count it
                c++;
                counted = true;
            }
        }
        else {      // new char, so update last and reset counted to false
            last = word.charAt(i);
            counted = false
        }
    }     
    return c;
}

编辑 - 将 aaaa 计为 4，固定为计为 1