如何计算“+”和“++”在Java中出现的频率？

public class FrequencyCalculator {
    public static void main(String[] args) {
        String str = "Java++ is a powerful language+";
        char[] charArray = str.toCharArray();
        int count = 0;

        for (int i = 0; i < charArray.length; i++) {
            if (charArray[i] == '+') {
                if (i < charArray.length - 1 && charArray[i + 1] == '+') {
                    count += 2;
                    i++;
                } else {
                    count++;
                }
            }
        }

        System.out.println("频率：" + count);
    }
}