Problema na hora da execução

import java.io.FileNotFoundException;

import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Scanner;

public class ArrayOfGuns implements Runnable {
	List<armas> ArrayOfGuns = new ArrayList<armas>();
	Map<String, armas> locationOfGuns = new HashMap<String, armas>();
	Scanner fA = new Scanner(System.in);

	CriaArma c = new CriaArma();
	ImprimeTabela t = new ImprimeTabela();

	public void adiciona(armas g) {
		ArrayOfGuns.add(g);
		locationOfGuns.put(g.nome, g);
	}

	public void pega(int i) {
		ArrayOfGuns.get(i).mostra();
	}

	public void totalDeArmas(int i) {
		if (i == 1) {
			System.out.println("Total de armas: " + ArrayOfGuns.size());
		} else {

			ArrayOfGuns.size();
		}
	}

	public void ordena() {
		Collections.sort(ArrayOfGuns);
	}

	public void mostraTudo() {
		System.out.println("Armas Disponíveis: " + ArrayOfGuns);
	}

	public void localizaArma(String nome) {
		locationOfGuns.get(nome).mostra();
	}

	public void NovaArma() {
		this.adiciona(c.leitor());

	}

	public void imprime() throws FileNotFoundException {
		t.imprime(this.ArrayOfGuns);

	}

	public void run() {
		System.out
				.println("O que deseja verificar? \n1-Adicionar Armas;\n2-Imprimir Arsena;");
		int i = fA.nextInt();

		if (i == 1) {
			this.NovaArma();
		}
		if (i == 2) {
			try {
				this.imprime();
			} catch (FileNotFoundException e) {
				e.printStackTrace();
			}
		}

		System.out.print("Deseja algo mais?(1 = y/ 2 = n)");
		int d = fA.nextInt();

		if (d == 1) {
			this.run();
		}
		if (d == 2) {
			System.out.println("Obrigado!");
		}

	}

}

public class TesteArray {
	public static void main(String[] args) throws IOException  {

		Scanner arm = new Scanner(System.in);

		ArrayOfGuns s = new ArrayOfGuns();
		s.run();
}
}