在以下方法中，当输入窗口出现时，它没有正确地为SolarPanel进行添加。
当我输入“Electric”，然后输入“Yes / yes”时，我得到以下信息
基本价格:20000
电气型号:2000
合计:22000
但是当我做“电动” +“是/是”时，我得到
基本价格:20000
电气型号:2000
太阳能板:5000
总计:27000
怎么会？
public static int CalculateCost()
{
String typeOfCarCost = askCarType();
String SolarPanelCost = askSolarPanel();
int basicPrice = 20000;
int ElectricModel = 2000;
int SolarPanel = 5000;
int total = 0;
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);
}
return total;
}//ends CalculateCost
例如，它要求:
电动或混合动力(我选择了电动，这将使总成本增加2000)
电动
太阳能电池板(是或否，我选择是。这将使总成本增加5000)
是
控制台窗口将显示此内容，但是不会对Solar Panel进行添加。
基本价格:20000
电气型号:2000
合计:22000
此外，当同时选择“电气模型”和“太阳能电池板”时，我如何考虑总折扣的-500。
整个代码如下。
有什么建议吗？
import javax.swing.*;
public class short7 {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
PrintOptions();
}//ends main
public static String askCarType()
{
String typeOfCar;
typeOfCar = JOptionPane.showInputDialog("Electric or Hybrid?");
if (!typeOfCar.equals("Electric") && (!typeOfCar.equals("electric") && (!typeOfCar.equals("Hybrid") && (!typeOfCar.equals("hybrid")))))
{
JOptionPane.showMessageDialog(null, "You have to choose either an Electric or Hybrid type of car.");
typeOfCar = JOptionPane.showInputDialog("Electric or Hybrid?");
}
return typeOfCar;
}//ends askCarType
public static String askSolarPanel()
{
String wantSolarPanel;
wantSolarPanel = JOptionPane.showInputDialog("Do you want a Solar Panel?");
if (!wantSolarPanel.equals("Yes") && (!wantSolarPanel.equals("yes") && (!wantSolarPanel.equals("No") && (!wantSolarPanel.equals("no")))))
{
JOptionPane.showMessageDialog(null, "You have to enter either Yes or No");
wantSolarPanel = JOptionPane.showInputDialog("Do you want a Solar Panel?");
}
return wantSolarPanel;
}//ends askSolarPanel
public static int calculateDiscount()
{
String typeOfCarSelected = askCarType();
String SolarPanelSelected = askSolarPanel();
int Discount = 0;
if (typeOfCarSelected.equals("Electric") && (typeOfCarSelected.equals("electric") && (typeOfCarSelected.equals("Hybrid") && (typeOfCarSelected.equals("hybrid") & SolarPanelSelected.equals("Yes") || SolarPanelSelected.equals("yes")))))
{
Discount = 500;
}
else
{
Discount = 0;
}
return Discount;
}//ends calculateDiscount
public static int CalculateCost()
{
String typeOfCarCost = askCarType();
String SolarPanelCost = askSolarPanel();
int basicPrice = 20000;
int ElectricModel = 2000;
int SolarPanel = 5000;
int total = 0;
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);
}
return total;
}//ends CalculateCost
public static void PrintOptions()
{
int printTotal = CalculateCost();
}//ends PrintOptions
}//ends class short7
最佳答案
您需要使用双括号和“&&”，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);
}
关于java - 如果语句运算符被忽略？，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/20291656/