如果语句运算符被忽略？

我认为&你需要&&在你的if语句中加倍.

改变这个:

if (typeOfCarCost.equals("Electric") || (typeOfCarCost.equals("electric") & (SolarPanelCost.equals("No") || (SolarPanelCost.equals("no")))))

对此:

if (typeOfCarCost.equals("Electric") || (typeOfCarCost.equals("electric") &&(SolarPanelCost.equals("No") || (SolarPanelCost.equals("no")))))

同样在你的其他if陈述中.改变那个!

在旁注:

正如RhinoFeeder在下面评论的那样,重要的是要了解&和&&之间的区别.所以区别很简单:

&&是合乎逻辑的.它评估操作的左侧,如果是,则继续并评估右侧.

&是按位AND.它评估操作的两个方面.

编辑:-

即使你的编辑后你错过了&在这里

& SolarPanelSelected.equals("Yes")

尝试更改if else块,如下所示:

if ((typeOfCarCost.equals("Electric") || typeOfCarCost.equals("electric")) && ((SolarPanelCost.equals("No") || SolarPanelCost.equals("no")))
{
    total = basicPrice + ElectricModel;
    System.out.println("Basic Price:" + basicPrice);
    System.out.println("Electric Model:" + ElectricModel);
    System.out.println("Total:" + total);
}
else if ((typeOfCarCost.equals("Electric") || typeOfCarCost.equals("electric")) && (SolarPanelCost.equals("Yes") || SolarPanelCost.equals("yes")))
{
    total = basicPrice + ElectricModel + SolarPanel;
    System.out.println("Basic Price:" + basicPrice);
    System.out.println("Electric Model:" + ElectricModel);
    System.out.println("Solar Panel:" + SolarPanel);
    System.out.println("Total:" + total);
}
else 
{
    total += basicPrice;
    System.out.println("Basic Price:" + basicPrice);
    System.out.println("Total:" + total);
}