2439 별 찍기 - 2

2439 별 찍기 - 2

* BufferedReader, StringBuilder, 상수

import java.io.*; public class Main { public static final String LINNER = "

"; public static final String BLANK = " "; public static void main(String[] args) throws Exception { BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); StringBuilder star = new StringBuilder(); StringBuilder result = new StringBuilder(); int num = Integer.parseInt(br.readLine()); br.close(); for(int i=1; i<=num; i++) { StringBuilder blank = new StringBuilder(); star.append("*"); for(int j=num-i; j>0; j--) { blank.append(BLANK); } result.append(blank); result.append(star); result.append(LINNER); } System.out.print(result); } }

더 빠르고 직관적인 로직

* BufferedReader, StringBuilder

- StringBuilder 생성을 적게하고 가독성이 좋다

import java.io.*; public class Main { public static void main(String[] args) throws IOException { BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); int N = Integer.parseInt(br.readLine()); br.close(); StringBuilder sb = new StringBuilder(); for (int i = 1; i <= N; i++) { for (int j = 1; j <= N - i; j++) { sb.append(' '); } for (int k = 1; k <= i; k++) { sb.append('*'); } sb.append('

'); } System.out.print(sb); } }

from http://sieghart.tistory.com/47 by ccl(A) rewrite - 2021-09-13 14:01:41