题解 | #统计大写字母个数#

public class Main{
   public static void main(String[] str){
        Scanner sc =new Scanner(System.in);
        String start = sc.nextLine();
        char[] chars = start.toCharArray();
        ArrayList<Character> characters = new ArrayList<>();
        characters.add('A');
        characters.add('B');
        characters.add('C');
        characters.add('D');
        characters.add('E');
        characters.add('F');
        characters.add('G');
        characters.add('H');
        characters.add('I');
        characters.add('J');
        characters.add('K');
        characters.add('L');
        characters.add('M');
        characters.add('N');
        characters.add('O');
        characters.add('P');
        characters.add('Q');
        characters.add('R');
        characters.add('S');
        characters.add('T');
        characters.add('U');
        characters.add('V');
        characters.add('W');
        characters.add('X');
        characters.add('Y');
        characters.add('Z');
        int count =0;
        for(int i=0;i<chars.length;i++){
            if(characters.contains(chars[i])){
                count++;
            }
        }
        System.out.println(count);
    }
}