public ArrayList<String> capturaOperacaoMatematica() {

        criaListaBotoesOperacoes();

        if (todasOperacoesSelecionadas()) {
            return operacoes();
        }
        ArrayList<String> operacoes = new ArrayList<String>();
        for (int i = 0; i < 4; i++) {
            if (selectedOperacoes.get(i).isSelected()) {
                if (selectedOperacoes.get(i) == jCBAdicao) {
                    operacoes.add("+");
                }
                if (selectedOperacoes.get(i) == jCBSubtracao) {
                    operacoes.add("-");
                }
                if (selectedOperacoes.get(i) == jCBMultiplicacao) {
                    operacoes.add("*");
                }
                if (selectedOperacoes.get(i) == jCBDivisao) {
                    operacoes.add("/");
                }

            }
        }

        for (String i : operacoes) {
            System.out.println("Operacoes selecionado(s): " + i);
        }
        return operacoes;
    }