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 nextLine = in.nextLine().toUpperCase();
        String secondLine = in.nextLine().toUpperCase();
        int count = 0;
        String substring = "";


        while (true){

            if (nextLine.length() > 1) {
                substring = nextLine.substring(0, 1);
                if (secondLine.equals(substring)) {
                    count++;
                }
            } else {
                if (secondLine.equals(nextLine)) {
                    count++;
                }
                break;
            }

            if (nextLine.length() > 1) {
                nextLine = nextLine.substring(1);
            }


        }


        System.out.println(count);
    }
}