public static void excluiContato(String nome) throws FileNotFoundException, IOException {
        StringBuilder sb = new StringBuilder();
        InputStream is = new FileInputStream("Contatos.txt");
        PrintStream qs = new PrintStream("Auxiliar.txt");
        Scanner entrada = new Scanner(is);
        String l, texto;
        while (entrada.hasNextLine()) {
            l = entrada.nextLine();
            String vetor[] = l.split("@");
            if (!vetor[0].equals(nome)) {
                sb.append(String.format("%s@%s@%s", vetor[0], vetor[1], vetor[2]));
                qs.println(sb.toString());
                sb.setLength(0);
            }
        }
        PrintStream ps = new PrintStream("Contatos.txt");
        InputStream es = new FileInputStream("Auxiliar.txt");
        Scanner entrada2 = new Scanner(es);
        while (entrada2.hasNextLine()) {
            ps.println(entrada2.nextLine());
        }
        ps.close();
        es.close();
        is.close();

    }