CifradoCesar

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package Entregable;

import java.io.File;
import java.io.FileWriter;
import java.util.Scanner;
import Entregable.exception.TooHighNumberException;

/**
 *
 * @author javie
 */
public class CifradoCesar {

    public static void main(String[] args) {
        FileWriter fw = null;
        Scanner scFile = null;
        String nombreFichero = args[0];
        int des = Integer.parseInt(args[1]);

        char[] linea;
        String texto = "";

        File f = new File(nombreFichero);
        File fe = new File("./" + nombreFichero + ".cfr");

        if (!f.exists()) {
            System.out.println("El fichero no existe");

        } else {
            try {


                scFile = new Scanner(f);
                fw = new FileWriter(fe);
                while (scFile.hasNextLine()) {
                    linea = scFile.nextLine().toCharArray();
                    for (char letra : linea) {
                        texto = texto + cifrado.cifrar(letra, des, false);
                    }
                    fw.write(texto + "\n");
                    texto = "";
                }
                System.out.println("Fichero cifrado");
            } catch (TooHighNumberException e) {
                System.out.println("Desplazamiento fuera del limite");
            } catch (Exception e) {
                System.out.println("Se ha producido un error");
            } finally {
                if (scFile != null) {
                    scFile.close();
                }
                if (fw != null) {
                    try {
                        fw.close();
                    } catch (Exception e) {
                        System.out.println("Error al cerrar");
                    }
                }
            }

        }
    }
}