字符串消消乐

遇到3个一样的就标记

 public static void test(String s) {
        boolean modify = false;
        int len = 0;
        char[] re = new char[s.length()];
        for (int i = 0; i < s.length(); i++) {
            if (s.charAt(i) != '*') {
                re[len++] = s.charAt(i);
            }
        }
        char[] res = new char[len];
        System.arraycopy(re, 0, res, 0, len);
        char slow = 0;
        char fast = 1;
        while (fast < len) {
            if (fast + 1 < len && res[fast] == res[fast + 1] && res[fast] == res[slow]) {
                char temp = res[slow];
                while (fast < len && res[fast] == temp) {
                    modify = true;
                    res[slow] = '*';
                    res[fast] = '*';
                    fast++;
                }
            }
            slow = fast;
            fast++;
        }
        if (modify) {
            test(new String(res));
        } else
            System.out.println(Arrays.toString(res));
    }