1
因此，我正在完成一項試圖輸出房屋內電器能耗的作業。我創建了名爲ElectricCooker的Appliance和名爲ElectricShower的Appliance。除了不同的變量名稱之外，它們都具有完全相同的代碼，但一些如何產生不同的輸出。方法輸出的值不正確？
下面是相關的代碼：（抱歉的代碼量，這個再現程序）
ElectricCooker
public class ElectricCooker extends Appliance
{
public int isOn = -1;
public int isOff = 0;
public int incrementTime;
public int varPass = -1;
@Override
public int currentState()
{
if (varPass == 0)
return isOff;
else
{
return isOn;
}
//returns isOn;
}
@Override
public void useTime(int defaultTime)
{
defaultTime = 15;
incrementTime = 4;
}
public void cook()
{
//add code
}
@Override
public void timePasses()
{
if(varPass == isOff)
varPass = 0;
else
{
ElectricMeter.getInstance().incrementConsumed(electricityUse);
ElectricMeter.getInstance().incrementConsumed(5);
int getCookerConsumed = ElectricMeter.getInstance().getElectricityUsed();
System.out.println("Electric cooker electricity consumption = " + getCookerConsumed);
}
}
ElectricCooker(int electricityUse, int gasUse, int waterUse, int timeOn)
{
super(electricityUse, gasUse, waterUse, timeOn);
this.electricityUse = 5 * incrementTime;
this.gasUse = 0 * incrementTime;
this.waterUse = 0 * incrementTime;
this.timeOn = 15 * incrementTime;
}
}
ElectricShower
public class ElectricShower extends Appliance
{
public int isOn = -1;
public int isOff = 0;
public int incrementTime;
public int varPass = -1;
@Override
public int currentState()
{
if (varPass == 0)
return isOff;
else
{
return isOn;
}
//returns isOn;
}
@Override
public void useTime(int defaultTime)
{
defaultTime = 15;
incrementTime = 4;
}
@Override
public void timePasses()
{
if(varPass == isOff)
varPass = 0;
else
{
ElectricMeter.getInstance().incrementConsumed(electricityUse);
ElectricMeter.getInstance().incrementConsumed(5);
int getShowerConsumed = ElectricMeter.getInstance().getElectricityUsed();
System.out.println("Electric shower electricity consumption = " + getShowerConsumed);
}
}
ElectricShower(int electricityUse, int gasUse, int waterUse, int timeOn)
{
super(electricityUse, gasUse, waterUse, timeOn);
this.electricityUse = 5 * incrementTime;
this.gasUse = 0 * incrementTime;
this.waterUse = 0 * incrementTime;
this.timeOn = 15 * incrementTime;
}
}
電器
abstract public class Appliance
{
public int varPass;
public int isOn;
public int isOff;
public int electricityUse, gasUse, waterUse, timeOn;
public abstract void useTime(int defaultTime);
public int currentState()
{
if (varPass == 0)
return isOff;
else
{
return isOn;
}
//returns isOn;
}
public abstract void timePasses();
Appliance(int electricityUse,int gasUse,int waterUse,int timeOn)
{
electricityUse = 0;
gasUse = 0;
waterUse = 0;
timeOn = 0;
}
}
ElectricMeter
public class ElectricMeter
{
ElectricMeter() {}
private static ElectricMeter instance = new ElectricMeter();
public static ElectricMeter getInstance() { return instance; }
private int electricityUsed = 0;
public void incrementConsumed(int value)
{
electricityUsed += value;
}
public int getElectricityUsed()
{
return electricityUsed;
}
}
家
import java.util.ArrayList;
public class House
{
ArrayList<Appliance> applianceList = new ArrayList<>();
ElectricShower calleShower = new ElectricShower(1, 1, 1, 1);
ElectricCooker calleCooker = new ElectricCooker(1, 1, 1, 1);
public void addAppliance()
{
applianceList.add(calleShower);
applianceList.add(calleCooker);
}
public void timePasses()
{
calleShower.timePasses();
calleCooker.timePasses();
//this method is called as part of the simulation to trigger a new fifteen minute period
//in the house. When it is called, it will in turn call timePasses() on all the Appliances in the House.
}
}
public class CourseworkTest {
public static void main(String[] args)
{
House callHouse = new House();
callHouse.timePasses();
}
}
輸出
Electric shower electricity consumption = 5
Electric cooker electricity consumption = 10
我一直在這個小時工作，我只是不明白如何完全相同的代碼可以產生不同的結果？我看不出10和其他5當他們做完全相同的事情，並通過相同的過程。非常感謝任何幫助，謝謝。
您擁有的另一個問題是妨礙您理解您的代碼，因爲您到處都有重複。刪除設備的子類，並將不同的參數傳遞給其構造函數以創建新的設備實例。同時刪除Meter類。這是沒有必要的，也使你的代碼複雜化。最後，這是展示問題所需的最少代碼。編輯出所有不相關的東西（例如，所有不相關的字段和方法）。學習使用調試器也會有所幫助。 – Bohemian