javabank項(xiàng)目

1、Java 基礎(chǔ)實(shí)戰(zhàn)Bank 項(xiàng)目實(shí)驗(yàn)題目 1：創(chuàng)建一個(gè)簡(jiǎn)單的銀行程序包實(shí)驗(yàn)?zāi)康模篔ava 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(shí)驗(yàn)說明：在這個(gè)練習(xí)里，創(chuàng)建一個(gè)簡(jiǎn)單版本的 Account 類。將這個(gè)源文件放入 banking 程序包中。在創(chuàng)建單個(gè)帳戶的默認(rèn)程序包中，已編寫了一個(gè)測(cè)試程序 TestBanking。這個(gè)測(cè)試程序初始化帳戶余額，并可執(zhí)行幾種簡(jiǎn)單的事物處理。最后，該測(cè)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(shí)現(xiàn)上述 UML 框圖中的模型。a. 聲明一個(gè)私有對(duì)象屬性：balance，這個(gè)屬性保留了銀

2、行帳戶的當(dāng)前（或 即時(shí)）余額。b. 聲明一個(gè)帶有一個(gè)參數(shù)（init_balance）的公有構(gòu)造器，這個(gè)參數(shù)為 balance 屬性賦值。c. 聲明一個(gè)公有方法 geBalance，該方法用于獲取經(jīng)常余額。d. 聲明一個(gè)公有方法 deposit,該方法向當(dāng)前余額增加金額。e. 聲明一個(gè)公有方法 withdraw 從當(dāng)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(yùn)行 TestBanking 類。可以看到下列輸出結(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(chǔ)實(shí)戰(zhàn)Bank 項(xiàng)目實(shí)驗(yàn)題目 2：擴(kuò)展銀行項(xiàng)目，添加一個(gè) Customer 類。Customer 類將包含一個(gè) Account對(duì)象。實(shí)驗(yàn)?zāi)康模菏褂靡妙愋偷某蓡T變量。提 示：1. 在banking包下的創(chuàng)建Customer類。該類必須實(shí)現(xiàn)上面的UML圖表中的模型。a. 聲明三個(gè)私有對(duì)

6、象屬性：firstName、lastName 和 account。b. 聲明一個(gè)公有構(gòu)造器，這個(gè)構(gòu)造器帶有兩個(gè)代表對(duì)象屬性的參數(shù)（f 和 l）c. 聲明兩個(gè)公有存取器來訪問該對(duì)象屬性，方法 getFirstName 和 getLastName 返回相應(yīng)的屬性。d. 聲明 setAccount 方法來對(duì) 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(yùn)行這個(gè) TestBanking 程序。應(yīng)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(chǔ)實(shí)戰(zhàn)Bank 項(xiàng)目實(shí)驗(yàn)題目 3：修改 withdraw 方法以返回一個(gè)布爾值，指示交易是否成功。實(shí)驗(yàn)?zāi)康模菏褂糜蟹祷刂档姆椒āＬ?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(yùn)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(chǔ)實(shí)戰(zhàn)Bank 項(xiàng)目實(shí)驗(yàn)題目 4：將用數(shù)組實(shí)現(xiàn)銀行與客戶間的多重關(guān)系。實(shí)驗(yàn)?zāi)康模涸陬愔惺褂脭?shù)組作為模擬集合操

15、作。提示：對(duì)銀行來說，可添加 Bank 類。 Bank 對(duì)象跟蹤自身與其客戶間的關(guān)系。用 Customer 對(duì)象的數(shù)組實(shí)現(xiàn)這個(gè)集合化的關(guān)系。還要保持一個(gè)整數(shù)屬性來跟蹤銀 行當(dāng)前有多少客戶。a. 創(chuàng)建 Bank 類b. 為 Bank 類 增 加 兩 個(gè) 屬 性 ： customers(Customer對(duì)象的數(shù)組 ) 和 numberOfCustomers(整數(shù)，跟蹤下一個(gè) 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(gè)新的 Customer對(duì)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(guān)的客戶。g. 編譯并運(yùn)行 TestBanking 程序。可以看到下列輸出結(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(chǔ)實(shí)戰(zhàn)Bank 項(xiàng)目實(shí)驗(yàn)題目 5：在銀行項(xiàng)目中創(chuàng)建 Account 的兩個(gè)子類：SavingAccount 和 CheckingAccount實(shí)驗(yàn)?zāi)康模豪^承、多態(tài)、方法的重寫。提 示：創(chuàng)建 Account 類的兩個(gè)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(gè)類型為 double 的 interestRate 屬性d. 該類必須包括帶有兩個(gè)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(shí)現(xiàn) CheckingAccount 類1 CheckingAccount 類必須擴(kuò)展 Account 類2 該類必須包含一個(gè)類型為 double 的 overdraftProtection 屬性。3 該類必須包含一個(gè)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(gè)帶有兩個(gè)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(shè)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(dāng)前余額足夠彌補(bǔ)取款 amount,則正常進(jìn)行。如果不夠彌補(bǔ)但是存在透支 保護(hù)，則嘗試用 overdraftProtection 得值來彌補(bǔ)該差值（balance-amount）. 如果彌補(bǔ)該透支所需要的金額大于當(dāng)前的保護(hù)級(jí)別。則整個(gè)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(yīng)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(shí)驗(yàn)題目：5_續(xù)1創(chuàng)建客戶賬戶實(shí)驗(yàn)?zāi)康模篿nstanceof 運(yùn)算符的應(yīng)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(gè)Customer可以有多個(gè)Account。（聲明至少有5個(gè)）2 完成TestBanking程序該程序創(chuàng)建一個(gè)客戶和賬戶的集合，并生成這些客戶及其賬戶余額的報(bào)告。在TestBanking.Java文件中，你會(huì)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(cè)試擁有的賬戶類型，并且將account_type設(shè)置為適當(dāng)?shù)闹担纾骸癝avingsAccount”或“CheckingAccount”。4 編譯并運(yùn)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(shí)驗(yàn)題目：5_續(xù)2實(shí)現(xiàn)更為復(fù)雜的透支保護(hù)機(jī)制注釋-這是練習(xí)1的選擇練習(xí)。它包括了更為復(fù)雜的透支保護(hù)機(jī)制模型。它使用客戶儲(chǔ)蓄。它使用客戶儲(chǔ)蓄賬戶完成透支保護(hù)。本練習(xí)必須在完成上述兩個(gè)練習(xí)后進(jìn)行。實(shí)驗(yàn)?zāi)康模豪^承、多態(tài)、方法的重寫。說明：修改SavingAccount類1.仿照練習(xí)1“Account類的兩個(gè)子類”一節(jié)實(shí)現(xiàn)SavingsAccount類。2.SavingAccou

49、nt類必須擴(kuò)展Account類。3.該類必須包含一個(gè)類型為double的interestRate屬性4.該類必須包括一個(gè)帶有兩個(gè)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(xí)1“Account類的兩個(gè)子類”一節(jié)實(shí)現(xiàn)CheckingAccount類。2.CheckingAccount類必須擴(kuò)展Account類3.該類必須包括一個(gè)關(guān)聯(lián)屬性，稱作protectedBy，表示透支保護(hù)。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(gè)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(dāng)前余額足夠彌補(bǔ)取款amount，則正常進(jìn)行。如果不夠彌補(bǔ)但是存在透支保護(hù)則嘗試用儲(chǔ)蓄賬戶來彌補(bǔ)這個(gè)差值（bala

51、nce-amount）。如果后一個(gè)交易失敗，則整個(gè)交易一定失敗，但余額未受影響。修改Customer類，使其擁有兩個(gè)賬戶：一個(gè)儲(chǔ)蓄賬戶和一個(gè)支票賬戶：兩個(gè)都是可選的。1.在練習(xí)5_續(xù)1修改，原來的Customer類包含一個(gè)稱作account的關(guān)聯(lián)屬性，可用該屬性控制一個(gè)Account對(duì)象。重寫這個(gè)類，使其包含兩個(gè)關(guān)聯(lián)屬性：savingAccount和checkingAccount，這兩個(gè)屬性的缺省值是null2.包含兩個(gè)訪問方法：getSaving和getChecking，這兩個(gè)方法分別返回儲(chǔ)蓄和支票總數(shù)。3. 包含兩個(gè)相反的方法：SetSaving和setChecking，這兩個(gè)方法分別為savingAccount和checkingAccount這兩個(gè)關(guān)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