字符规则匹配Java

package com.patience.interview.huawei;

import java.util.Scanner;


public class FindWordByRule {

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        // 注意 hasNext 和 hasNextLine 的区别
        while (in.hasNextLine()) { // 注意 while 处理多个 case
            String line = in.nextLine();
            int count = 0;
            int i = 0;
            while(i < line.length()){
                char c = line.charAt(i++);
                if(c >= 'A' && c<= 'Z'){
                    count++;
                }
            }
            System.out.println(count);
        }
    }
}