题解 | 计算某字符出现次数

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        // 获取元数据
        String s1 = sc.nextLine().trim().toLowerCase();
        // 获取 计算字符
        String s2 = sc.nextLine().trim().toLowerCase();
        // 取第一个字符
        char target = s2.charAt(0);
        int count = 0;
        for (int i = 0; i < s1.length(); i++) {
            if (s1.charAt(i) == target) {
                count++;
            }
        }
        System.out.println(count);
    }
}