题解 | #计算某字符出现次数#

import java.util.Scanner;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Main {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        String string = scanner.nextLine();

        String character = scanner.nextLine();

        Pattern compile = Pattern.compile(character, Pattern.CASE_INSENSITIVE);
        Matcher matcher = compile.matcher(string);
        int count = 0;
        while (matcher.find()) {
            count++;
        }
        System.out.println(count);
    }

}