java--Bank项目 5

Account类

package banking5;

public class Account {
      protected double balance;//账户余额
      
      public Account (double init_balance) {//构造器
    	  balance = init_balance;
      }
      
      public double getBalance() {//获取账户余额
    	  return balance;
      }
      public boolean deposit(double amt) {//存钱
    	  balance+=amt;
    	  return true;
      }
      public boolean withdraw(double amt) {//取钱
    	  if(balance>=amt) {
    		  balance-=amt;
    		  return true;
    	  }else {
    		  System.out.println("余额不足！");
    		  return false;
    	  }
      }
}

Customer类

package banking5;

public class Customer {
   private String firstName;
   private String lastName;
   private Account account;
  
   public Customer(String f,String l) {
	   firstName=f;
	   lastName=l;
   }
   
   public String getFirstName() {
	   return firstName;
   }
   
   public String getLastName() {
	   return lastName;
   }
   
   public Account getAccount() {
	   return account;
   }
   
   public void setAccount(Account acct) {
	   account = acct;
   }
}

Bank类

package banking5;

public class Bank {
   private Customer[] customers;//用于存放客户
   private int numberOfCustomers;//记录Customer的个数
   
   public Bank() {
	   customers = new Customer[5]; 
   }
   
   public void addCustomer(String f,String l) {
	   Customer cust = new Customer(f,l);
	   customers[numberOfCustomers] = cust;
	   numberOfCustomers++;
   }
   
   public int getNumberOfCustomers() {
	   return numberOfCustomers;
   }
   
   public Customer getCustomer(int index) {
	   return customers[index];
   }
}

SavingAccount类

package banking5;

public class SavingAccount extends Account{
   private double interestRate;
   
   public SavingAccount(double balance,double init_rate) {
	   super(balance);
	   this.interestRate=init_rate;
   }
}

CheckingAccount类

package banking5;

public class CheckingAccount extends Account{
	private double overdraftProtection;
	
	public CheckingAccount(double balance) {
		super(balance);
	}
    public CheckingAccount(double balance,double protect) {
    	super(balance);
    	this.overdraftProtection=protect;
    }
	public double getOverdraftProtection() {
		return overdraftProtection;
	}
	public void setOverdraftProtection(double overdraftProtection) {
		this.overdraftProtection = overdraftProtection;
	}
	public boolean withdraw(double amt) {
		if(balance>=amt) {
			balance-=amt;
			return true;
		}else if(overdraftProtection>=amt-balance) {
			overdraftProtection-=(amt-balance);
			balance=0;
			return true;
		}else {
			return false;
		}
	}
}

测试代码

package testbanking;

import banking5.*;

public class testBanking5 {

	public static void main(String[] args) {
		Bank bank = new Bank();
		Customer customer;
		Account account;
		
		System.out.println("creating the customer Jane Smith.");
		bank.addCustomer("Jane", "Smith");
		account = new SavingAccount(500.00,0.03);
		customer = bank.getCustomer(0);
		customer.setAccount(account);
		System.out.println("Creating her Saving Account with a 500.00 balance and 3% interest.");
		
		System.out.println("Creating the customer Owen Bryant.");
		bank.addCustomer("Owen", "Bryant");
		customer = bank.getCustomer(1);
		account = new CheckingAccount(500.00);
		customer.setAccount(account);
		System.out.println("Creating his checking Account with a 500.00 balance and no overdraft protection.");
		
		System.out.println("Creating the customer Tim Soley.");
		bank.addCustomer("Tim", "Soley");
		customer = bank.getCustomer(2);
		account = new CheckingAccount(500.00,500.00);
		System.out.println("Creating his checking Account with a 500.00 balance and 500.00 overdraft protection.");
        
		System.out.println("Creating the customer Maria Soley.");
		bank.addCustomer("Maria", "Soley");
		customer = bank.getCustomer(3);
		System.out.println("Maria shares her Checking Account with her huaband Tim.");
		customer.setAccount(bank.getCustomer(2).getAccount());
		System.out.println();
		
		System.out.println("Retrieving the customer Jane Smith with her saving account");
		customer=bank.getCustomer(0);
		account = customer.getAccount();
		System.out.println("Withdraw 150.00:"+account.withdraw(150.00));
		System.out.println("Deposit 22.50:"+account.deposit(22.50));
		System.out.println("Withdraw 47.62:"+account.withdraw(47.62));
		System.out.println("Withdraw 400.00:"+account.withdraw(400.00));
		System.out.println("Customer["+customer.getLastName()+","+customer.getFirstName()+"] has a balance of "+account.getBalance());
		System.out.println();
		
		System.out.println("Retrieving the customer Owen Bryant with his checking account with no overdraft protection.");
		customer=bank.getCustomer(1);
		account = customer.getAccount();
		System.out.println("Withdraw 150.00:"+account.withdraw(150.00));
		System.out.println("Deposit 22.50:"+account.deposit(22.50));
		System.out.println("Withdraw 47.62:"+account.withdraw(47.62));
		System.out.println("Withdraw 400.00:"+account.withdraw(400.00));
		System.out.println("Customer["+customer.getLastName()+","+customer.getFirstName()+"] has a balance of "+account.getBalance());
		System.out.println();
		
		System.out.println("Retrieving the customer Tim Soley with his checking account that has overdraft protection.");
		customer=bank.getCustomer(2);
		account = customer.getAccount();
		System.out.println("Withdraw 150.00:"+account.withdraw(150.00));
		System.out.println("Deposit 22.50:"+account.deposit(22.50));
		System.out.println("Withdraw 47.62:"+account.withdraw(47.62));
		System.out.println("Withdraw 400.00:"+account.withdraw(400.00));
		System.out.println("Customer["+customer.getLastName()+","+customer.getFirstName()+"] has a balance of "+account.getBalance());
		System.out.println();
		
		System.out.println("Retrieving the customer Maria Soley with her joint checking accout with husband Tim.");
		customer=bank.getCustomer(3);
		account = customer.getAccount();
		System.out.println("Deposit 150.00:"+account.deposit(150.00));
		System.out.println("Withdraw 750.00:"+account.withdraw(750.00));
		System.out.println("Customer["+customer.getLastName()+","+customer.getFirstName()+"] has a balance of "+account.getBalance());
		System.out.println();
	}

}