擴展銀行項目，添加一個（客戶類）Customer類。Customer類將包含一個Account對象。

練習目標－使用引用類型的成員變量：在本練習中，將擴展銀行項目，添加一個（客戶類）Customer類。Customer類將包含一個Account對象。

 

任務

1. 在banking包下的創建Customer類。該類必須實現上面的UML圖表中的模型。

 

a. 聲明三個私有對象屬性：firstName、lastName和account。

b. 聲明一個公有構造器，這個構造器帶有兩個代表對象屬性的參數（f和l）

c. 聲明兩個公有存取器來訪問該對象屬性，方法getFirstName和getLastName返回相應的屬性。

d. 聲明setAccount 方法來對account屬性賦值。

e. 聲明getAccount 方法以獲取account屬性。

                        

 

1. 在exercise2主目錄里，編譯運行這個TestBanking程序。應該看到如下輸出結果:

Creating the customer Jane  Smith.

Creating her account  with  a  500.00  balance.

Withdraw 150.00

Deposit 22.50

Withdraw 47.62

Customer [Smith, Jane] has a balance of 324.88

 

package banking;

import java.util.List;

public class Customer extends Account
{
    //成員屬性
    private String firstName ;
    private String lastName ;
    private double account ;
    
    //構造方法
    public Customer() 
    {
    
    }
    //構造方法
    public Customer(String f , String l) 
    {
        this.firstName = f ;
        this.lastName = l ;
    }
    
    //get set 
    public String getFirstName() {
        return firstName;
    }

    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }

    public String getLastName() {
        return lastName;
    }

    public void setLastName(String lastName) {
        this.lastName = lastName;
    }

    public double getAccount() {
        return account;
    }

    public void setAccount(double account) {
        this.account = account;
    }
    
    public String toString() {
        return  firstName + ", " + lastName ;
    }

    
}

package banking;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

public class TestBanking {

    public static void main(String[] args) 
    {
        System.out.println("————————————————————————");
        
        //實例化顧客
        Customer cr = new Customer( ) ;
    
        cr.setFirstName("Jane");
        cr.setLastName("Smith");
        cr.setBalance(500);
        System.out.println("Creating the customer "+cr.getFirstName() +" "+cr.getLastName());
        System.out.println("Creating her account  with  a " +cr.getBalance()+" balance");
        System.out.println("Withdraw "+(cr.getBalance()-cr.withdraw(150)) );
        double x1 = cr.getBalance( ) ;
        System.out.println("Deposit "+(cr.deposit(22.5)-x1));
        System.out.println("Withdraw "+(cr.getBalance()-cr.withdraw(47.62)));
        System.out.println("Customer "+cr.getLastName()+" "+cr.getFirstName()+
                                    " has a balance of "+cr.getBalance());
    
        System.out.println("————————————————————————");
        
        
    }

}