백준~문풀 후 최적화 추가~/단계별로 풀어보기
15552 빠른 A+B
elesis
2021. 9. 10. 16:55
* BufferedReader, BufferedWriter, StringTokenizer
package baek;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.util.StringTokenizer;
public class Main {
public static void main(String[] args) throws Exception {
// Scanner와 System.out.println 대신 BufferedReader와 BufferedWriter를 사용
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
int num = Integer.parseInt(br.readLine());
StringTokenizer token;
for(int i=0; i<num; i++) {
token = new StringTokenizer(br.readLine(), " ");
bw.write((Integer.parseInt(token.nextToken()) + Integer.parseInt(token.nextToken())) + "\n");
}
br.close();
bw.flush();
bw.close();
}
}
*BufferedReader, StringBuilder, StringTokenizer
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
int N = Integer.parseInt(br.readLine());
StringTokenizer st;
StringBuilder sb = new StringBuilder();
for (int i = 0; i < N; i++) {
st = new StringTokenizer(br.readLine()," ");
sb.append(Integer.parseInt(st.nextToken()) + Integer.parseInt(st.nextToken())).append('\n');
}
br.close();
System.out.println(sb);
둘다 자바어플리케이션에서 실행했을때는 NumberFormatException이 일어나며 동작을 안한다. 왜그렇지...