Только Ромб

import java.util.Scanner;
import java.util.ArrayList;

public class Main {

    public static void main (String[] args) {
        Scanner in = new Scanner(System.in);
        System.out.print("Введите число и символ: ");
        ArrayList<String> tmpAllM = new ArrayList<>();
        String symbol = in.nextLine();
        tmpAllM = numberLiter(symbol);
        int number = Integer.parseInt(tmpAllM.get(0));
        String liter = tmpAllM.get(1);
        for (int i =0 ; i < (number*2+1); i ++){
            System.out.print(liter);
        }
        System.out.println();
        for (int g = 1; g <(number-1)*2; g=g+2) {
            System.out.print(liter);
            for(int f = 0; f <(number-1)*2-(g-1) ; f=f+2) {
                System.out.print(".");
            }
            for(int f = 0; f < g; f++){
                System.out.print(liter);
            }
            for(int f = 0; f < (number-1)*2-(g-1) ; f=f+2) {
                System.out.print(".");
            }
            System.out.print(liter);
            System.out.println();
        }
        for (int i =0 ; i < (number*2+1); i ++) {
            System.out.print(liter);
        }
        System.out.println();
        for (int g = (number-1)*2; g >1; g=g-2) {
            System.out.print(liter);
            for(int f = (number-1)*2-(g-1); f >0 ;f=f-2) {
                System.out.print(".");
            }
            for(int f = g-1; f > 0; f--){
                System.out.print(liter);
            }
            for(int f = (number-1)*2-(g-1); f >0 ; f=f-2) {
                System.out.print(".");
            }
            System.out.print(liter);
            System.out.println();
        }
        for (int i =0 ; i < (number*2+1); i ++){
            System.out.print(liter);
        }
    }
    public static ArrayList<String> numberLiter (String str){
        ArrayList<String> tmpM = new ArrayList<>();
        for(String s: str.split(" ")){
            tmpM.add(s);
        }
        return tmpM;
    }

}