题解 | #计算某字符出现次数#

import java.util.Scanner;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String s = scanner.nextLine();
        String a = scanner.nextLine();

        char[] chars = s.toCharArray();
        int count = 0;
        for (char aChar : chars) {
            String s1 = String.valueOf(aChar);
            if (a.equalsIgnoreCase(s1)) {
                count++;
            }
        }
        System.out.println(count);
    }
}