Java从同一对象的不同HashMap中获取最终计算结果

Question

我想根据用户输入计算相机的评级系统。实际上有3种评级机制，最后必须进行计算才能得到最终评级。我将每个结果保存在不同的 HashMap 中

下面的 HashMap 有 Camera 对象和 Double=Rating 值，表示特定相机在该特定机制上具有该评级。

//Portalibility Rating Mechanism
1. Map<Camera,Double> portabilityRatedCameraList= 
   PriorityRate.getPortabillityRate(cameralist,portabillity)

//Ease Of Use Rating Mechanism
2. Map<Camera,Double> easeofdCameraList=
PriorityRate.getEaseOfUser(cameralist, easeofuse, manualcontrol);

//UsageRating Mechanism
3. Map<Camera,Double> usageRatedCameraList=
PriorityRate.getUsageRate(cameralist, portabillity, props, manualcontrol);

现在最终评级算法类似于

Final rate of a camera= portabillityrate + easeofrate + usagerate

那么，如何获得特定相机的最终评级？如何从 HashMap 1、2、3 中获取该特定相机的值？

在此行之后我无法继续

for(int i=0; i<cameralist.size(); i++)
{
 Camera camera=cameralist.get(i)
//How can I get the rating value for the Camera object from above 3 HashMap?

}

提前致谢!

Answer 1

由于我们拥有所有 3 个 Maps 的键，即 Camera 对象，因此我们可以通过键获取值并将其总计。当您不指定要做什么时结果是我在下面的代码中打印了它。

  for(int i=0; i<cameralist.size(); i++)
    {
     Camera camera=cameralist.get(i)
     Object cameraTotal = portabilityRatedCameraList.get(camera) + easeofdCameraList.get(camera) + usageRatedCameraList.get(camera)
     System.out.println("The total rating of the camera "+camera+" is "+(Double)cameraTotal);
    }