本文介绍了实现嵌套if语句的另一种方法的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我正在尝试重构下面的代码,该代码使用多个嵌套的if语句来检查两个列表是否包含相同的项目.
I am trying to refactor this code I have below that uses several nested if statements to check if two list contains the same items.
List<Car> CarList = CarService.findCarByConfigtype(pageName);
for (int i = 0; i < CarList.size(); i++) {
System.out.println(CarRestApiController.data().getModel());
if (CarList.get(i).getModel().equals(CarRestApiController.data().getModel())) {
dataFound.add(CarList.get(i).getModel());
if (CarList.get(i).getDerivative().equals(CarRestApiController.data().getDerivative())) {
dataFound.add(CarList.get(i).getDerivative());
if (CarList.get(i).getSvp().equals(CarRestApiController.data().getSvp())) {
dataFound.add(CarList.get(i).getSvp());
if (CarList.get(i).getEngine().equals(CarRestApiController.data().getEngine())) {
dataFound.add(CarList.get(i).getEngine());
if (CarList.get(i).getFueltype().equals(CarRestApiController.data().getFueltype())) {
dataFound.add(CarList.get(i).getFueltype());
if (CarList.get(i).getBodystyle().equals(CarRestApiController.data().getBodystyle())) {
dataFound.add(CarList.get(i).getBodystyle());
if (CarList.get(i).getTransmission().equals(CarRestApiController.data().getTransmission())) {
dataFound.add(CarList.get(i).getTransmission());
if (CarList.get(i).getSalescategory().equals(CarRestApiController.data().getSalescategory())) {
dataFound.add(CarList.get(i).getSalescategory());
}
}
}
}
}
}
}
}
}
推荐答案
我首先按照@ T.J.Crowder的建议将CarList.get(i)
和CarRestApiController.data()
的结果保存到变量中.然后,我将翻转if-checks并使用continue
摆脱嵌套.像这样:
I would first save the result of CarList.get(i)
and CarRestApiController.data()
to variables as @T.J.Crowder suggested. Then I would flip the if-checks and use continue
to get rid of the nesting. Like this:
List<Car> carList = CarService.findCarByConfigtype(pageName);
for (int i = 0; i < carList.size(); i++) {
Car apiData = CarRestApiController.data();
Car carListData = carList.get(i);
System.out.println(CarRestApiController.data().getModel());
if (!carListData.getModel().equals(apiData.getModel())) {
continue;
}
dataFound.add(carListData.getModel());
if (!carListData.getDerivative().equals(apiData.getDerivative())) {
continue;
}
dataFound.add(carListData.getDerivative());
if (!carListData.getSvp().equals(apiData.getSvp())) {
continue;
}
dataFound.add(carListData.getSvp());
// ... and so on.
}
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