[java 백준] 브론즈3/ 2445번 별찍기 -8

https://www.acmicpc.net/problem/2445

2445번: 별 찍기 - 8

import java.util.Scanner;
 
public class Main {
 
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int num = sc.nextInt();
        for (int i = 1; i <= num; i++) {
            for (int k = 1; k <= i; k++) {
                System.out.print("*");
            }
            for (int k = 1; k <= 2 * (num - i); k++) {
                System.out.print(" ");
            }
            for (int j = 1; j <= i; j++) {
 
                System.out.print("*");
            }
 
            System.out.println();
        }
        for (int j = num - 1; j >= 1; j--) {
            for (int k = 1; k <= j; k++) {
                System.out.print("*");
            }
            for (int k = 1; k <= 2 * (num - j); k++) {
                System.out.print(" ");
            }
            for (int k = 1; k <= j; k++) {
                System.out.print("*");
            }
            System.out.println();
        }
 
    }
 
}