1、精選優質文檔-傾情為你奉上EXP2課題(項目)名稱: 實驗二 面向對象程序設計計劃學時:2 實驗類型: 1.演示性 2.驗證性 3.綜合性 4.設計性 5.其它授課日期: 年 月 日 第 周 星期 第 節實驗目的1. 驗證面向對象三大特性2. 學習封裝的實現3. 學習繼承的實現4. 編寫多態實例5. 學習抽象類的使用6. 學習接口的使用實驗要求1. 掌握封裝的實現方法2. 掌握繼承的編程方式和思想3. 理解多態現象4. 掌握抽象類和接口的使用實驗內容與步驟1. 封裝的實現（1） 編寫程序模擬個人銀行賬號類?？紤]個人銀行的特點，建立類模型（注意屬性和方法的訪問權限修飾符）參考代碼public c

2、lass BankAccount private String accountID;private String password;private int balance;public BankAccount(String accountID,String password,String operator)this.accountID=accountID;this.password=password;this.balance=0;System.out.println("Create a BankAccount");System.out.println("Accou

3、ntID:"+this.accountID);System.out.println("Current Balance:"+this.balance);System.out.println("Operator:"+operator);System.out.println("Save Account info to Database");public void queryBalance(String password)if(password=this.password)System.out.println("Passw

4、ord OK");System.out.println("Current Account Balance:"+this.balance);elseSystem.out.println("Password Erro");public void changePassword(String oldPassword,String newPassword)if(oldPassword=this.password)System.out.println("Password OK");this.password=newPassword;Sy

5、stem.out.println("Change Passord OK");elseSystem.out.println("Password Erro");public void deposit(int money,String operator)this.balance+=money;System.out.println("add balance OK.Operator:"+operator);System.out.println("Save Account change to database");public

6、 void withdraw(String password,int money,String operator)if(password=this.password)System.out.println("Password OK");if(this.balance>money)this.balance-=money;System.out.println("withdraw:"+money+" ok, Operator:"+operator );System.out.println("Current Account Ba

7、lance:"+this.balance);System.out.println("Save Account change to database");elseSystem.out.println("withdraw:"+money+" erro. Because of not enough balance");elseSystem.out.println("Password Erro");（2） 編寫測試類，完成如下（1）中類方法的測試實現如下業務：開戶，存款100，查詢余額，取款50，查詢余額，取款2

8、00，查詢余額public class Test1 public static void main(String args) BankAccount bankaccount =new BankAccount("", "", "TOM");bankaccount.queryBalance("");bankaccount.changePassword("","");bankaccount.deposit(100,"TOM");bankaccount.withd

9、raw("",50,"TOM");2. 繼承的實現（1） 按如下類圖編寫代碼 參考代碼class Person String id;String name;String age;public void sleep() System.out.println("I am Person,I am sleeping");public void eat() System.out.println("I am Person,I am eating");class Student extends Person String sno

10、;public void study() System.out.println("I am Student,I am studying");class Teacher extends Person String tid;public void tech() System.out.println("I am Student,I am taching");（2） 編寫測試類并創建main()方法，完成如下操作A 分別創建Person、Student、Teacher對象，完成屬性和每個方法的調用測試B 在Student和Teacher中完成eat()方法的重寫

11、C 編寫類型轉化示例（向上類型轉化、向下類型轉化）3. 多態現象 在完成（2）中Student、Teacher類eat()方法重寫后，在測試類中編寫如下代碼并在main()方法中調用static void askAllToEat(Person ps) for(int i=0;i<ps.length;i+) psi.eat(); psi.sleep(); 從以上代碼中體會多態現象。public class Test2 public static void main(String args) Person person = new Person();person.sleep();person

12、.eat();Student student = new Student();student.sleep();student.eat();student.study();Teacher teacher = new Teacher();teacher.sleep();teacher.eat();teacher.tech();static void askAllToEat(Person ps) for (int i = 0; i < ps.length; i+) psi.eat();psi.sleep();4. 抽象類的使用編寫以上類圖所示類，并編寫測試代碼測試抽象類的使用參考代碼abstr

13、act class Printerprivate String printerType;Printer(String printerType)this.printerType=printerType;abstract void print(String txt);void showMyType()System.out.println("My Type is:"+printerType);class InkPrinter extends PrinterInkPrinter(String inkPrinterType)super(inkPrinterType);void pri

14、nt(String txt)System.out.println("I am Ink Printer");System.out.println("Start to Print:"+txt);class LasertPrinter extends PrinterLasertPrinter(String laserPrinterType)super(laserPrinterType);void print(String txt)System.out.println("I am Lasert Printer");System.out.pri

15、ntln("Start to Print:"+txt);編寫測試類及main() 方法，完成如下操作A. 創建Printer,InkPrinter,LaserPrinter類的對象。B. 設計并編寫演示多態現象的代碼5. 接口的使用編寫以上類圖的代碼，并編寫測試類測試接口的使用參考代碼interface IScanvoid scan();abstract class Printerprivate String printerType;Printer(String printerType)this.printerType=printerType;abstract void p

16、rint(String txt);void showMyType()System.out.println("My Type is:"+printerType);abstract class InkPrinter extends PrinterInkPrinter(String inkPrinterType)super(inkPrinterType);void print(String txt)System.out.println("I am Ink Printer");System.out.println("Start to Print:"+txt);class LasertPrinter extends PrinterLasert