스캐너를 받지 않고

public class Main {
    public int solution(String str, char t) {
        int answer = 0;
        str = str.toUpperCase();
        t = Character.toUpperCase(t);
        for (int i = 0; i < str.length(); i++) {
            if (str.charAt(i) == t) answer++;
        }
        return answer;
    }
    public static void main(String[] args) {
        Main T = new Main();
        String str = "Computercooler";
        char c = 'c';
        System.out.println(T.solution(str, c));

    }