D3 7675. 통역사 성경이

https://www.swexpertacademy.com/main/code/problem/problemDetail.do?contestProbId=AWqPvqoqSLQDFAT_

SW Expert Academy

 

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.StringReader;
import java.util.Arrays;
import java.util.StringTokenizer;

public class Solution {
	static int T;
	public static void main(String[] args) throws NumberFormatException, IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		br = new BufferedReader(new StringReader(src));
		T = Integer.parseInt(br.readLine());
		for(int t=1; t<=T; t++) {
			StringBuilder sb = new StringBuilder("#"+t+" ");
			int line = Integer.parseInt(br.readLine());
			String data = "";
			while((data+=br.readLine()).split("[.?!]").length<line) {
				//data+=br.readLine();
			}
			String [] splited = data.split("[.?!]");
			System.out.println(Arrays.toString(splited));
			for(String s: splited) {
				StringTokenizer tokens = new StringTokenizer(s);
				int cnt = 0;
				while(tokens.hasMoreTokens()) {
					if(isName(tokens.nextToken())) {
						cnt++;
					}
				}
				sb.append(cnt).append(" ");
			}
			System.out.println(sb);
		}
	}

	public static boolean isName(String word) {
		return word.matches("^[A-Z][a-z]{0,}$");
	}

	static String src = "3\r\n" +
			"2\r\n" +
			"Annyung Hasae Yo! LoL!\r\n" +
			"3\r\n" +
			"my name is Hye Soo. my id is\r\n" +
			"Rhs0266. what your id Bro?\r\n"
			+ "1\r\n"
			+ "Aa!";
}

 

초창기 코드의 문제점

String data = "";
while(data.split("[.?!]").length<line) {
   data+=br.readLine();
}

"".split("[.?!]")는 length가 0인 문자열을 가지는 배열 리턴!! 따라서 1 문장인 경우 처리하지 못하는 문제 발생