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 in = new Scanner(System.in);
        String str1 = in.nextLine().toUpperCase();
        String str2 = in.nextLine().toUpperCase();
        String str3 = str1.replace(str2,"");
        System.out.println(str1.length()-str3.length());
    }
}