將類作爲參數傳遞到另一個類方法

-2

我試圖將AirlineTicket傳遞到類客戶中的方法addPoints。我想Customer.addPoints（）方法能夠訪問AirlineTicket.getPrice（）將類作爲參數傳遞到另一個類方法

Customer.java

public class Customer { 

private String name; 
private String address; 
private int membershipNumber; 
private int membershipPoints; 

public void applyPoints(Class AirlineTicket){ 
    int ticketPrice = AirlineTicket.getPrice(); 

} 

//zero-argument constructor 
public Customer() { 
    super(); 
} 

//3-argument constructor with points set to 0 
public Customer(String name, String address, int membershipNumber) { 
    this.name = name; 
    this.address = address; 
    this.membershipNumber = membershipNumber; 
    membershipPoints = 0; 
} 

//to-string 
@Override 
public String toString() { 
    return "Customer [name=" + name + ", address=" + address + ", membershipNumber=" + membershipNumber 
      + ", membershipPoints=" + membershipPoints + "]"; 
} 

//public getters protected setters 
public String getName() { 
    return name; 
} 
protected void setName(String name) { 
    this.name = name; 
} 
public String getAddress() { 
    return address; 
} 
protected void setAddress(String address) { 
    this.address = address; 
} 
public int getMembershipNumber() { 
    return membershipNumber; 
} 
protected void setMembershipNumber(int membershipNumber) { 
    this.membershipNumber = membershipNumber; 
} 
public int getMembershipPoints() { 
    return membershipPoints; 
} 
protected void setMembershipPoints(int membershipPoints) { 
    this.membershipPoints = membershipPoints; 
} 



}

AirlineTicket.java的價值

public class AirlineTicket { 

private Customer passenger; 
private Flight flight; 
private double price; 

//zero-argument constructor 
public AirlineTicket() { 
    super(); 
} 

//3-argument constructor 
public AirlineTicket(Customer passenger, Flight flight, double price) { 
    super(); 
    this.passenger = passenger; 
    this.flight = flight; 
    this.price = price; 
} 
//to-string 
@Override 
public String toString() { 
    return "AirlineTicket [passenger=" + passenger + ", flight=" + flight + ", price=" + price + "]"; 
} 

//public getters and protected setters 
public Customer getPassenger() { 
    return passenger; 
} 
protected void setPassenger(Customer passenger) { 
    this.passenger = passenger; 
} 
public Flight getFlight() { 
    return flight; 
} 
protected void setFlight(Flight flight) { 
    this.flight = flight; 
} 
public double getPrice() { 
    return price; 
} 
protected void setPrice(double price) { 
    this.price = price; 
}

}

來源

2017-01-22 salty_coffee

你實際上是試圖通過一個Class類型的變量？或者是一個ClassA類型的變量？ –

遵循Java命名約定並使用有意義的描述性名稱，您會發現代碼變得更容易理解。目前，您有一個名爲'ClassA'類的'ClassA'的變量。你沒有向我們展示一個名爲'Class'的類，所以我們不知道它有什麼getters/setters。但是命名與另一個類同名的變量不會使其成爲另一個類的實例。 – David

非常好。現在究竟是什麼問題？ –

public void applyPoints(Class AirlineTicket){

一個問題是，這不是01型變量。您有一個類型爲Class的變量。我想你會想是這樣的：

public void applyPoints(AirlineTicket ticket){

然後你就可以做

int ticketPrice = ticket.getPrice();

來源

2017-01-22 21:26:43

將類作爲參數傳遞到另一個類方法

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