题解 | #统计大写字母个数#

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.temporal.ChronoUnit;
import java.util.*;
import java.util.stream.IntStream;
import java.util.stream.Stream;

import static java.util.Arrays.*;
import static java.util.stream.Stream.*;


public class Main {
    public static void main(String[] args) throws IOException {

        //testCompletePack();
        testTh();
    }

    private static void testTh() throws IOException {
        BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
        String str;
        while ((str = bf.readLine()) != null) {
            String reg = "[A-Z]";
            int count = 0;
            char[] chars = str.toCharArray();
            for (char aChar : chars) {
                String s = aChar + "";
                boolean matches = s.matches(reg);
                if (matches) {
                    count++;
                }
            }
            System.out.println(count);
        }

    }




}