[백준] - 단계별로 풀어보기(반복문) 2439

백준 2439번

별 찍기 - 2

문제 출처 https://www.acmicpc.net/problem/2439

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내가 작성한 코드

import java.io.IOException;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;

public class Main {

	public static void main(String[] args) throws IOException{
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
		int n = Integer.parseInt(br.readLine()); //int형 변환
		
		for(int i=1; i<=n; i++) {
			String s = "*";
			String m =" "; //공백 문자열
			bw.write(m.repeat(n-i)+s.repeat(i)+"\n");
		}
		bw.flush();
		bw.close();
	}
}

BufferedReader / BufferedWriter 설명 참고