题解 | #计算某字符出现次数#

import java.util.Scanner;

import java.io.InputStreamReader;
import java.io.BufferedReader;
import java.io.IOException;


// 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) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        //首先将字符串的字母大小统一转为大写，计算每个字符的大小
        String str = br.readLine().toUpperCase();
        //取出查询字符
        char c = br.readLine().toUpperCase().charAt(0);
        int count = 0;
        for (char cc : str.toCharArray()) {
            if (cc == c) {
                count ++;
            }
        }
        System.out.println(count);
    }
}