题解 | #计算某字符出现次数#

package com.company.niuke;

import java.util.Scanner;

/**
 * @ProjectName: leetcode
 * @Package: com.company.niuke
 * @ClassName: Main
 * @Author: Administrator
 * @Description: 牛客网测试
 * @Date: 2022/2/11 20:30
 * @Version: 1.0
 */
public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String str = scanner.nextLine().toLowerCase();
        String ch = scanner.nextLine().toLowerCase();

        System.out.println(str.length() - str.replaceAll(ch,"").length());
    }
}