javabank項目

1、Java 基礎實戰(zhàn)Bank 項目實驗題目 1：創(chuàng)建一個簡單的銀行程序包實驗目的：Java 語言中面向?qū)ο蟮姆庋b性及構(gòu)造器的創(chuàng)建和使用。實驗說明：在這個練習里，創(chuàng)建一個簡單版本的 Account 類。將這個源文件放入 banking 程序包中。在創(chuàng)建單個帳戶的默認程序包中，已編寫了一個測試程序 TestBanking。這個測試程序初始化帳戶余額，并可執(zhí)行幾種簡單的事物處理。最后，該測試程 序顯示該帳戶的最終余額。提示：1創(chuàng)建 banking 包2 在 banking 包下創(chuàng)建 Account 類。該類必須實現(xiàn)上述 UML 框圖中的模型。a. 聲明一個私有對象屬性：balance，這個屬性保留了銀

2、行帳戶的當前（或 即時）余額。b. 聲明一個帶有一個參數(shù)（init_balance）的公有構(gòu)造器，這個參數(shù)為 balance 屬性賦值。c. 聲明一個公有方法 geBalance，該方法用于獲取經(jīng)常余額。d. 聲明一個公有方法 deposit,該方法向當前余額增加金額。e. 聲明一個公有方法 withdraw 從當前余額中減去金額。3打開TestBanking.java文件，按提示完成編寫，并編譯 TestBanking.java 文件。4 運行 TestBanking 類?？梢钥吹较铝休敵鼋Y(jié)果：Creating an account with a 500.00 balanceWithdraw

3、 150.00Deposit 22.50Withdraw 47.62The account has a balance of 324.88/TestBanking.java 文件/* This class creates the program to test the banking classes.* It creates a new Bank, sets the Customer (with an initial balance),* and performs a series of transactions with the Account object.*/package test;i

4、mport banking.*;public class TestBanking public static void main(String args) Account account; / Create an account that can has a 500.00 balance. System.out.println(Creating an account with a 500.00 balance.); /code System.out.println(Withdraw 150.00); /code System.out.println(Deposit 22.50); /code

5、System.out.println(Withdraw 47.62); /code / Print out the final account balance System.out.println(The account has a balance of + account.getBalance(); Java 基礎實戰(zhàn)Bank 項目實驗題目 2：擴展銀行項目，添加一個 Customer 類。Customer 類將包含一個 Account對象。實驗目的：使用引用類型的成員變量。提 示：1. 在banking包下的創(chuàng)建Customer類。該類必須實現(xiàn)上面的UML圖表中的模型。a. 聲明三個私有對

6、象屬性：firstName、lastName 和 account。b. 聲明一個公有構(gòu)造器，這個構(gòu)造器帶有兩個代表對象屬性的參數(shù)（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。2. 在 exercise2 主目錄里，編譯運行這個 TestBanking 程序。應該看到如下輸出結(jié)果:Creating the customer Jane Smith.Creating her ac

7、count with a 500.00 balance.Withdraw 150.00Deposit 22.50Withdraw 47.62Customer Smith, Jane has a balance of 324.88/TestBanking.java 文件/* This class creates the program to test the banking classes.* It creates a new Bank, sets the Customer (with an initial balance),* and performs a series of transact

8、ions with the Account object.*/import banking.*;public class TestBanking public static void main(String args) Customer customer; Account account; / Create an account that can has a 500.00 balance. System.out.println(Creating the customer Jane Smith.); /code System.out.println(Creating her account wi

9、th a 500.00 balance.); /code System.out.println(Withdraw 150.00); /code System.out.println(Deposit 22.50);/code System.out.println(Withdraw 47.62); /code / Print out the final account balance System.out.println(Customer + customer.getLastName() + , + customer.getFirstName() + has a balance of + acco

10、unt.getBalance(); Java 基礎實戰(zhàn)Bank 項目實驗題目 3：修改 withdraw 方法以返回一個布爾值，指示交易是否成功。實驗目的：使用有返回值的方法。提 示：1 修改 Account 類a. 修改 deposit 方法返回 true（意味所有存款是成功的）。b. 修改 withdraw 方法來檢查提款數(shù)目是否大于余額。如果amt小于 balance, 則從余額中扣除提款數(shù)目并返回 true，否則余額不變返回 false。2 在 exercise3 主目錄編譯并運行 TestBanking 程序，將看到下列輸出;Creating the customer Jane Sm

11、ith.Creating her account with a 500.00 balance. Withdraw 150.00: trueDeposit 22.50: true Withdraw 47.62: true Withdraw 400.00: falseCustomer Smith, Jane has a balance of 324.88/TestBanking.java 文件/* This class creates the program to test the banking classes.* It creates a new Bank, sets the Customer

12、 (with an initial balance),* and performs a series of transactions with the Account object.*/import banking.*;public class TestBanking public static void main(String args) Customer customer; Account account; / Create an account that can has a 500.00 balance. System.out.println(Creating the customer

13、Jane Smith.);/code System.out.println(Creating her account with a 500.00 balance.); /code / Perform some account transactions 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.withd

14、raw(47.62); System.out.println(Withdraw 400.00: + account.withdraw(400.00); / Print out the final account balance System.out.println(Customer + customer.getLastName() + , + customer.getFirstName() + has a balance of + account.getBalance(); Java 基礎實戰(zhàn)Bank 項目實驗題目 4：將用數(shù)組實現(xiàn)銀行與客戶間的多重關系。實驗目的：在類中使用數(shù)組作為模擬集合操

15、作。提示：對銀行來說，可添加 Bank 類。 Bank 對象跟蹤自身與其客戶間的關系。用 Customer 對象的數(shù)組實現(xiàn)這個集合化的關系。還要保持一個整數(shù)屬性來跟蹤銀 行當前有多少客戶。a. 創(chuàng)建 Bank 類b. 為 Bank 類 增 加 兩 個 屬 性 ： customers(Customer對象的數(shù)組 ) 和 numberOfCustomers(整數(shù)，跟蹤下一個 customers 數(shù)組索引)c. 添加公有構(gòu)造器，以合適的最大尺寸（至少大于 5）初始化 customers 數(shù)組。d. 添加 addCustomer 方法。該方法必須依照參數(shù)（姓，名）構(gòu)造一個新的 Customer對象然后

16、把它放到 customer 數(shù)組中。還必須把 numberofCustomers 屬性的值加 1。e. 添加 getNumOfCustomers 訪問方法，它返回 numberofCustomers 屬性值。f. 添加 getCustomer方法。它返回與給出的index參數(shù)相關的客戶。g. 編譯并運行 TestBanking 程序?？梢钥吹较铝休敵鼋Y(jié)果：Customer 1 is Simms,JaneCustomer 2 is Bryant,OwenCustomer 3 is Soley,TimCustomer 4 is Soley,Maria/TestBanking.java 文件/* T

17、his class creates the program to test the banking classes.* It creates a new Bank, sets the Customer (with an initial balance),* and performs a series of transactions with the Account object.*/import banking.*;public class TestBanking public static void main(String args) Bank bank = new Bank(); / Ad

18、d Customer Jane, Simms/code /Add Customer Owen, Bryant/code / Add Customer Tim, Soley/code / Add Customer Maria, Soley/code for ( int i = 0; i bank.getNumOfCustomers(); i+ ) Customer customer = bank.getCustomer(i); System.out.println(Customer + (i+1) + is + customer.getLastName()+ , + customer.getFi

19、rstName(); Java 基礎實戰(zhàn)Bank 項目實驗題目 5：在銀行項目中創(chuàng)建 Account 的兩個子類：SavingAccount 和 CheckingAccount實驗目的：繼承、多態(tài)、方法的重寫。提 示：創(chuàng)建 Account 類的兩個子類：SavingAccount 和 CheckingAccount 子類a. 修改 Account 類；將 balance 屬性的訪問方式改為 protectedb. 創(chuàng)建 SavingAccount 類，該類繼承 Account 類c. 該類必須包含一個類型為 double 的 interestRate 屬性d. 該類必須包括帶有兩個參數(shù)（bal

20、ance 和 interest_rate）的公有構(gòu)造器。該構(gòu) 造器必須通過調(diào)用 super(balance)將 balance 參數(shù)傳遞給父類構(gòu)造器。實現(xiàn) CheckingAccount 類1 CheckingAccount 類必須擴展 Account 類2 該類必須包含一個類型為 double 的 overdraftProtection 屬性。3 該類必須包含一個帶有參數(shù)（balance）的共有構(gòu)造器。該構(gòu)造器必須通過調(diào) 用 super(balance)將 balance 參數(shù)傳遞給父類構(gòu)造器。4 給類必須包括另一個帶有兩個參數(shù)（balance 和 protect）的公有構(gòu)造器。該 構(gòu)造器必

21、須通過調(diào)用 super(balance)并設置 overdragtProtection 屬性，將 balance 參數(shù)傳遞給父類構(gòu)造器。5 CheckingAccount 類必須覆蓋 withdraw 方法。此方法必須執(zhí)行下列檢查。如 果當前余額足夠彌補取款 amount,則正常進行。如果不夠彌補但是存在透支 保護，則嘗試用 overdraftProtection 得值來彌補該差值（balance-amount）. 如果彌補該透支所需要的金額大于當前的保護級別。則整個交易失敗，但余 額未受影響。6 在主 exercise1 目錄中，編譯并執(zhí)行 TestBanking 程序。輸出應為：Creat

22、ing the customer Jane Smith.Creating her Savings Account with a 500.00 balance and 3% interest.Creating the customer Owen Bryant.Creating his Checking Account with a 500.00 balance and no overdraft protection.Creating the customer Tim Soley.Creating his Checking Account with a 500.00 balance and 500

23、.00 in overdraft protection.Creating the customer Maria Soley.Maria shares her Checking Account with her husband Tim.Retrieving the customer Jane Smith with her savings account.Withdraw 150.00: trueDeposit 22.50: trueWithdraw 47.62: trueWithdraw 400.00: falseCustomer Simms, Jane has a balance of 324

24、.88Retrieving the customer Owen Bryant with his checking account with no overdraft protection.Withdraw 150.00: trueDeposit 22.50: trueWithdraw 47.62: trueWithdraw 400.00: falseCustomer Bryant, Owen has a balance of 324.88Retrieving the customer Tim Soley with his checking account that has overdraft

25、protection.Withdraw 150.00: trueDeposit 22.50: trueWithdraw 47.62: trueWithdraw 400.00: trueCustomer Soley, Tim has a balance of 0.0Retrieving the customer Maria Soley with her joint checking account with husband Tim.Deposit 150.00: trueWithdraw 750.00: falseCustomer Soley, Maria has a balance of 15

26、0.0/TestBanking 程序/* This class creates the program to test the banking classes.* It creates a new Bank, sets the Customer (with an initial balance),* and performs a series of transactions with the Account object.*/import banking.*;public class TestBanking public static void main(String args) Bank b

27、ank = new Bank(); Customer customer; Account account; / / Create bank customers and their accounts / System.out.println(Creating the customer Jane Smith.); bank.addCustomer(Jane, Simms); /code System.out.println(Creating her Savings Account with a 500.00 balance and 3% interest.); /code System.out.p

28、rintln(Creating the customer Owen Bryant.); /code customer = bank.getCustomer(1); System.out.println(Creating his Checking Account with a 500.00 balance and no overdraft protection.); /code System.out.println(Creating the customer Tim Soley.); bank.addCustomer(Tim, Soley); customer = bank.getCustome

29、r(2); System.out.println(Creating his Checking Account with a 500.00 balance and 500.00 in overdraft protection.); /code System.out.println(Creating the customer Maria Soley.); /code customer = bank.getCustomer(3); System.out.println(Maria shares her Checking Account with her husband Tim.); customer

30、.setAccount(bank.getCustomer(2).getAccount(); System.out.println(); / / Demonstrate behavior of various account types / / Test a standard Savings Account System.out.println(Retrieving the customer Jane Smith with her savings account.); customer = bank.getCustomer(0); account = customer.getAccount();

31、 / Perform some account transactions 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); / Print out t

32、he final account balance System.out.println(Customer + customer.getLastName() + , + customer.getFirstName() + has a balance of + account.getBalance(); System.out.println(); / Test a Checking Account w/o overdraft protection System.out.println(Retrieving the customer Owen Bryant with his checking acc

33、ount with no overdraft protection.); customer = bank.getCustomer(1); account = customer.getAccount(); / Perform some account transactions 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: + a

34、ccount.withdraw(47.62); System.out.println(Withdraw 400.00: + account.withdraw(400.00); / Print out the final account balance System.out.println(Customer + customer.getLastName() + , + customer.getFirstName() + has a balance of + account.getBalance(); System.out.println(); / Test a Checking Account

35、with overdraft protection System.out.println(Retrieving the customer Tim Soley with his checking account that has overdraft protection.); customer = bank.getCustomer(2); account = customer.getAccount(); / Perform some account transactions System.out.println(Withdraw 150.00: + account.withdraw(150.00

36、); 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); / Print out the final account balance System.out.println(Customer + customer.getLastName() + , + customer.getFi

37、rstName() + has a balance of + account.getBalance(); System.out.println(); / Test a Checking Account with overdraft protection System.out.println(Retrieving the customer Maria Soley with her joint checking account with husband Tim.); customer = bank.getCustomer(3); account = customer.getAccount(); /

38、 Perform some account transactions System.out.println(Deposit 150.00: + account.deposit(150.00); System.out.println(Withdraw 750.00: + account.withdraw(750.00); / Print out the final account balance System.out.println(Customer + customer.getLastName() + , + customer.getFirstName() + has a balance of

39、 + account.getBalance(); 實驗題目：5_續(xù)1創(chuàng)建客戶賬戶實驗目的：instanceof 運算符的應用提示：修改Customer類1 修改Customer類來處理具有多種類型的聯(lián)合賬戶。（例如用數(shù)組表示多重性一節(jié)所作的，該類必須包括以下的公有方法：addAccount(Account)，getAccount(int)和getNumOfAccounts()。每個Customer可以有多個Account。（聲明至少有5個）2 完成TestBanking程序該程序創(chuàng)建一個客戶和賬戶的集合，并生成這些客戶及其賬戶余額的報告。在TestBanking.Java文件中，你會發(fā)現(xiàn)注釋塊

40、以/*/來開頭和結(jié)尾。這些注釋只是必須提供的代碼的位置。3 使用instanceof操作符測試擁有的賬戶類型，并且將account_type設置為適當?shù)闹?，例如：“SavingsAccount”或“CheckingAccount”。4 編譯并運行該程序，將看到下列結(jié)果CUSTOMERS REPORT=Customer: Simms, JaneSavings Account: current balance is ￥500.00Checking Account: current balance is ￥200.00Customer: Bryant, OwenChecking Account: c

41、urrent balance is ￥200.00Customer: Soley, TimSavings Account: current balance is ￥1,500.00Checking Account: current balance is ￥200.00Customer: Soley, MariaChecking Account: current balance is ￥200.00Savings Account: current balance is ￥150.00/TestBanking程序/* This class creates the program to test t

42、he banking classes.* It creates a set of customers, with a few accounts each,* and generates a report of current account balances.*/import banking.*;import java.text.NumberFormat;public class TestBanking public static void main(String args) NumberFormat currency_format = NumberFormat.getCurrencyInst

43、ance(); Bank bank = new Bank(); Customer customer; / Create several customers and their accounts bank.addCustomer(Jane, Simms); customer = bank.getCustomer(0); customer.addAccount(new SavingAccount(500.00, 0.05); customer.addAccount(new CheckingAccount(200.00, 400.00); bank.addCustomer(Owen, Bryant)

44、; customer = bank.getCustomer(1); customer.addAccount(new CheckingAccount(200.00); bank.addCustomer(Tim, Soley); customer = bank.getCustomer(2); customer.addAccount(new SavingAccount(1500.00, 0.05); customer.addAccount(new CheckingAccount(200.00); bank.addCustomer(Maria, Soley); customer = bank.getC

45、ustomer(3); / Maria and Tim have a shared checking account customer.addAccount(bank.getCustomer(2).getAccount(1); customer.addAccount(new SavingAccount(150.00, 0.05); / Generate a report System.out.println(tttCUSTOMERS REPORT); System.out.println(ttt=); for ( int cust_idx = 0; cust_idx bank.getNumOf

46、Customers(); cust_idx+ ) customer = bank.getCustomer(cust_idx); System.out.println(); System.out.println(Customer: + customer.getLastName() + , + customer.getFirstName(); for ( int acct_idx = 0; acct_idx customer.getNumOfAccounts(); acct_idx+ ) Account account = customer.getAccount(acct_idx);String

47、account_type = ;/ Determine the account type/* Step 1:* Use the instanceof operator to test what type of account* we have and set account_type to an appropriate value, such* as Savings Account or Checking Account.*/ Print the current balance of the account/* Step 2:* Print out the type of account an

48、d the balance.* Feel free to use the currency_format formatter* to generate a currency string for the balance.*/ 實驗題目：5_續(xù)2實現(xiàn)更為復雜的透支保護機制注釋-這是練習1的選擇練習。它包括了更為復雜的透支保護機制模型。它使用客戶儲蓄。它使用客戶儲蓄賬戶完成透支保護。本練習必須在完成上述兩個練習后進行。實驗目的：繼承、多態(tài)、方法的重寫。說明：修改SavingAccount類1.仿照練習1“Account類的兩個子類”一節(jié)實現(xiàn)SavingsAccount類。2.SavingAccou

49、nt類必須擴展Account類。3.該類必須包含一個類型為double的interestRate屬性4.該類必須包括一個帶有兩個參數(shù)（balance和interest_rate）的公有構(gòu)造器。該構(gòu)造器必須通過調(diào)用super（balance）來將balance參數(shù)傳遞給父類構(gòu)造器修改CheckingAccount類1.仿照練習1“Account類的兩個子類”一節(jié)實現(xiàn)CheckingAccount類。2.CheckingAccount類必須擴展Account類3.該類必須包括一個關聯(lián)屬性，稱作protectedBy，表示透支保護。該屬性的類型為SavingAccount，缺省值必須是null。除此

50、之外該類沒有其他的數(shù)據(jù)屬性。4.該類必須包括一個帶有參數(shù)（balance）的公有構(gòu)造器，該構(gòu)造器必須通過調(diào)用super(balance)將balance參數(shù)傳遞到父類構(gòu)造器。5.修改構(gòu)造器為CheckingAccount(double balance,SavingAccount protect)構(gòu)造器。該構(gòu)造器必須通過調(diào)用super（balance）將balance參數(shù)傳遞給父類構(gòu)造器。6. CheckingAccount類必須覆蓋withdraw方法。該類必須執(zhí)行下面的檢查：如果當前余額足夠彌補取款amount，則正常進行。如果不夠彌補但是存在透支保護則嘗試用儲蓄賬戶來彌補這個差值（bala

51、nce-amount）。如果后一個交易失敗，則整個交易一定失敗，但余額未受影響。修改Customer類，使其擁有兩個賬戶：一個儲蓄賬戶和一個支票賬戶：兩個都是可選的。1.在練習5_續(xù)1修改，原來的Customer類包含一個稱作account的關聯(lián)屬性，可用該屬性控制一個Account對象。重寫這個類，使其包含兩個關聯(lián)屬性：savingAccount和checkingAccount，這兩個屬性的缺省值是null2.包含兩個訪問方法：getSaving和getChecking，這兩個方法分別返回儲蓄和支票總數(shù)。3. 包含兩個相反的方法：SetSaving和setChecking，這兩個方法分別為savingAccount和checkingAccount這兩個關聯(lián)屬性賦值。完成TestBanking程序Customer Simms, Jane has a checking balance of 200.0 and a savings balance of500.0Checking Acct Jane Simms : withdraw 150.00 succe