Refactor_Triangle

import java.util.Scanner;

public class Numbers_Triangle {
    public static void main(String[] args){

        Scanner sc = new Scanner(System.in);

        System.out.print("Enter n: ");
        int n = Integer.parseInt(sc.nextLine());

        for (int i = 1; i <= n ; i++) {
            printLine(i);
        }
        for (int i = n - 1; i >= 1 ; i--) {
            printLine(i);
        }
    }

    private static void printLine(int i) {
        for (int j = 1; j <= i; j++) {
            System.out.print(j + " ");
        }
        System.out.println();
    }
}