题解 | #计算某字符出现次数#

public class HJ2 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String firstWold = scanner.nextLine();
        String secondWold = scanner.nextLine();

        System.out.println(statisticalFrequency(firstWold, secondWold));
    }

    public static Integer statisticalFrequency(String firstWold, String secondWold) {
        Integer count = 0;
        char[] chars = firstWold.toCharArray();
        for (char aChar : chars) {
            if (secondWold.equalsIgnoreCase(String.valueOf(aChar))) {
                count++;
            }
        }
        return count;
    }
}