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 line = scanner.nextLine().toLowerCase();
        char cha = scanner.next().toLowerCase().charAt(0);
        int count = 0;
        for (int i = 0; i < line.length(); i++) {

            char c = line.charAt(i);
            if (cha == c) {
                count++;
            }

        }
        System.out.println(count);
    }
}