Arrow Shape

import java.util.Scanner;
public class Main
{
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        System.out.print("Enter a number bigger than 3 but smaller than 80: ");
        int n = Integer.parseInt(sc.nextLine());
        String firstLineDots = generateFrom(".", n/2);
        String firstHashtag = generateFrom("#",n);
        String firstLine = firstLineDots + firstHashtag + firstLineDots;
        System.out.println(firstLine);
        String insideDots = generateFrom(".",(n-2));

        String loopLines1 = firstLineDots + "#" + insideDots + "#" + firstLineDots;
        for(int i = 0;i<n-2;i++){
            System.out.println(loopLines1);
        }
        String middleHash = generateFrom("#",n/2+1);
        System.out.println(middleHash + insideDots + middleHash);

        int num1 = 1;
        String outsideDots = "";
        int num2 = n*2-5;
        String insideDots2 = "";
        for(int i=0;i<n-1;i++){
            if(i==n-2){
                num1=(2*n-1)/2;
                num2=0;

            }
            outsideDots = generateFrom(".",num1);
            insideDots2 = generateFrom(".",num2);
            if(i==n-2){
               System.out.println(outsideDots + "#"  + outsideDots);
            }
            else{
            System.out.println(outsideDots + "#" + insideDots2 + "#" + outsideDots);
            num1++;
            num2-=2;
            }

        }

    }

    public static String generateFrom(String symbol,int number){
        StringBuffer builder = new StringBuffer();
        for(int i=0;i<number;i++){
            builder.append(symbol);
        }
        return builder.toString();
    }
}