public Boolean pretarate() {
        if (this.txt_num_estado.getText().matches("[1-9][0-9]*") && this.txt_num_simbolo.getText().matches("[1-9][0-9]*")) {
            if (this.txt_num_estado.getText().length() != 0 && this.txt_num_simbolo.getText().length() != 0) {
                this.prTable(Integer.parseInt(this.txt_num_estado.getText()), Integer.parseInt(this.txt_num_simbolo.getText()));
                return true;
            }
        }
        return false;
    }