백준 10991 별 찍기 16 JAVA

10991번: 별 찍기 - 16

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