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) {
                modelTable.setColumnCount(Integer.parseInt(this.txt_num_simbolo.getText()) + 2);
                modelTable.setRowCount(Integer.parseInt(this.txt_num_estado.getText()) + 1);
//                this.table_trans.setTableHeader();
                return true;
            }
        }
        return false;
    }