백준 10820번 문자열 분석 [ Java ]

10820번: 문자열 분석

import java.io.*;
import java.util.*;

public class Main {
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

        String input = "";
        while ((input = br.readLine()) != null) {
            char str[] = input.toCharArray();
            int small = 0, capital = 0, num = 0, blank = 0;
            for (char ch : str) {
                if ('a' <= ch && ch <= 'z')
                    small++;
                else if ('A' <= ch && ch <= 'Z')
                    capital++;
                else if ('0' <= ch && ch <= '9')
                    num++;
                else
                    blank++;
            }
            System.out.printf("%d %d %d %d\n", small, capital, num, blank);
        }
    }
}