题解 | #统计大写字母个数#

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 sc = new Scanner(System.in);
        while (sc.hasNext()){
            String in = sc.nextLine();
            String up = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
            int count = 0;
            for (int i = 0; i < in.length(); i++) {
                if (up.contains(in.substring(i,i+1))){
                    count++;
                }
            }
            System.out.println(count);
        }
    }
}