父 - 車。小類：電或化石。孩子：私家車或出租車

我最近在接OOP，這讓我非常困惑。我想做一個超級汽車和電動或化石汽車作爲其子類。父 - 車。小類：電或化石。孩子：私家車或出租車

`abstract class Electric extends Car`.

問題是我只想製作Private或Taxi的實例。我怎樣組織這一點，這樣我就非常被允許發言的

Taxi cab1 = new Fossil()

我意識到這是一個明顯的答案的問題，但看着泛型和接口，直到我的眼睛瞪得痛之後，挫折感一直在增長。

如果有人能夠提醒我如何做到這一點，我將不勝感激，因爲我積極的認識並忘記了自己。

來源

2017-01-26 user2005142

之前制定你的類層次結構，還明確你想要這些對象爲* *做什麼，因爲這會決定什麼可以使意義，因爲一個接口或抽象類，以及它們的關係應該是什麼。例如，Taxi有不同於Private的方法嗎？ – Lagerbaer

好點。私人和出租車將有一些他們不分享的方法，而電動出租車則需要繼承Electric的所有方法，然後繼承Car。出租車也可以是化石，在這種情況下，它將需要繼承所有化石方法，而不是電子方法。 Car和Fossil的常用方法將在Car中找到。 – user2005142

您可能想要將引擎類型分成單獨的類並用它來組合自定義類型，例如'出租車cab1 =新出租車（新ElectricMotor（））;'。 – shmosel

車類：

public class Car{ 

private int yearOfManufacture; 
private String brand; 
private String model; 

private boolean forRent; 


public Car(String pBrand, String pModel, int pYearOfManufacture, boolean pForRent){ 
    this.yearOfManufacture = pYearOfManufacture; 
    this.brand = pBrand; 
    this.model = pModel; 
    this.forRent = pForRent; 
} 


public boolean isPrivate(){ 
    return (!forRent); 
} 

public int getYear()     
    { 
     return this.yearOfManufacture; 
    } 

public String getBrand() 
    { 
     return this.brand; 
    } 

public void setYear(int year) 
    { 
     this.yearOfManufacture = year; 
    } 

public void setBrand(String carBrand) 
    { 
     this.brand = carBrand; 
    } 

public void setModel(String model)       
    { 
     this.model = model; 

public String getModel() 
    { 
     return this.model; 
    } 

}

電動車類：

public class ElectricCar extends Car{ 

    private int electricPowerOutput; 

    public ElectricCar(String pBrand, String pModel, int pYearOfManufacture, int pElectricPowerOutput, boolean pForRent){ 
     super(pBrand,pModel,pYearOfManufacture,pForRent); 
     this.electricPowerOutput = pElectricPowerOutput; 
    } 

    public int getElectricPowerOutput(){ 
     return this.electricPowerOutput; 
    } 

    public void setElectricPowerOutput(int electricPower){ 
     this.electricPowerOutput = electricPower; 
    } 

}

化石車：

public class FossilCar extends Car{ 

    private int emissionRating; 

    public ElectricCar(String pBrand, String pModel, int pYearOfManufacture, int pEmissionRating, boolean pForRent){ 
     super(pBrand,pModel,pYearOfManufacture,pForRent); 
     this.emissionRating = pEmissionRating; 
    } 

    public int getEmissionRating(){ 
     return this.emissionRating; 
    } 

    public void setElectricPowerOutput(int emissionRating){ 
     this.emissionRating = emissionRating; 
    } 

}

希望這有助於！

來源

2017-01-26 18:11:15

謝謝你的努力。這雖然不是問題本身。我遇到的問題是試圖將出租車變成延伸汽車的化石。 – user2005142

你在想這樣的事嗎？

車類：

public class Car{ 

private int yearOfManufacture; 
private String brand; 
private String model; 
private Engine engine; 

public Car(String pBrand, String pModel, int pYearOfManufacture, Engine pEngine){ 
    this.yearOfManufacture = pYearOfManufacture; 
    this.brand = pBrand; 
    this.model = pModel; 
    this.engine = pEngine; 
} 

}

引擎類：

public class Engine { 

private int power; 
private int emission; 

public Engine(int power, int emission) { 
    this.power = power; 
    this.emission = emission; 
} 
}

IC引擎類：

public class ICEngine extends Engine { 

private int numOfValves; 

public ICEngine(int power, int emission, int numOfValves) { 
    super(int power, int emission); 
    this.numOfValves = numOfValves; 
} 
}

電動引擎類：

public class ElectricEngine extends Engine { 

private int wattage; 

public ICEngine(int power, int emission, int wattage) { 
    super(int power, int emission); 
    this.wattage = wattage; 
} 
}

出租車等級：

public class Taxi extends Car{ 

    private String driverName; 

    public Taxi(String driverName, String pBrand, String pModel, int pYearOfManufacture, Engine engine){ 
     super(pBrand, pModel, pYearOfManufacture, engine); 
     this.driverName = driverName; 
    } 
}

私家車類：

public class PrivateCar extends Car { 

private String ownerName; 

public PrivateCar(String ownerName, String pBrand, String pModel, int pYearOfManufacture, Engine engine) { 
    super(pBrand, pModel, pYearOfManufacture, engine); 
    this.ownerName = ownerName; 
} 


}

消費應用類：

public class MyApp { 

public static void main(String[] args) { 

    Engine eEngine1 = new ElectricEngine(100, 10, 10000); 
    Car myElectricTaxi = new Taxi("Driver1", "Honda", "Accord", 2013, eEngine1); 

    Engine icEngine1 = new ICEngine(100, 10, 6); 
    Car myICTaxi = new Taxi("Driver2", "Honda", "Accord", 2013, icEngine1); 

    Engine eEngine2 = new ElectricEngine(100, 10, 10000); 
    Car myElectricPrivateCar = new PrivateCar("Owner1", "Honda", "Accord", 2013, eEngine2); 

    Engine icEngine2 = new ICEngine(100, 10, 4); 
    Car myICPrivateCar = new PrivateCar("Owner2", "Honda", "Accord", 2013, icEngine2); 

} 

}

來源

2017-01-27 01:44:11

父 - 車。小類：電或化石。孩子：私家車或出租車

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