东北大学 面向对象程序设计ssd3考试试卷A

1、封:o:线总分二三四五东北大学考试试卷（A 卷）2012 2013 学年第 一 学期课程名称：面向对象程序设计| I.Single Choice (20 points,2 points each) TOC o 1-5 h z From within a child class, its parent class is referred to via the keyword?()(A) this (B)Base(C) Super(D)parentClasses from which of the following packages are implicitly imported into ev

2、ery Javaprogram?()(A) java.lang (B) java.util (C) java.awt (D) java.ioIn Java, the default layout manager for a JPanel component is ()BorderLayout (B) GridLayout (C) GridBagLayout (D) FlowLayoutThe Strategy design pattern is likely to be useful when implementing which of the following?()An applicati

3、on that offers several alternate sorting algorithmsA simple class to store the address of an organization of which only one instance can be instantiatedNone(B) I only (C) II only(D) I and IIIf the length of a particular array is the value of LIMIT, what is the index of the last item in thatarray?()L

4、IMIT (B) 0(C) LIMIT / 2(D) LIMIT - 1Which of the following statements is not true of the class java.util.ArrayList?()An instance of ArrayList can grow to accommodate new items when the collection is full.Once an object is inserted into an instance of ArrayList, it can never be removed.Items stored b

5、y an instance of ArrayList can be accessed using integer indexes.The constructor of the ArrayList class, when called with no arguments, causes an empty ArrayList to be constructed.If a file opened for reading does not exist, which of the following events will occur in Java?()A NullPointerException w

6、ill be raised.A new file will be createdA run-time error will occurA FileNotFoundException will be raised.A design pattern is typically used to ()allow the use of object-orientated concepts in a language that is not object-orientedreduce the number of classes in the design of a programensure that co

7、de executes at optimal speed during runtimedescribe a practical solution to a common design problemWhich of the following statements is (are) true in Java?()I Classes that contain abstract methods must be declared abstract.Classes that contain protected methods must be declared abstract.(A) I and II

8、 (B) I only (C) II only (D) None| II. Fill in blanks. (10 points, 1 point each )A design pattern can sure to make only one object in the software system.In a UML class diagrams representation of a class, the top, middle, and lower rectangular compartments respectively describe the , and of the class

9、.In an object model, the data that an object is responsible for maintaining are representedby.The data in a interface must be and .7 A collection typically models a relationship?()(A) many-to-many(B) zero-to-one(C) one-to-many(D)one-to-one , and are the base characters of Object-Oriented Programming

10、.III. Design a simple Book Seller System with strategy pattern. (25 points)You dont care all the functions of the system.There are three kinds of client which include VIPMember(0.9*price), NormalMember(1*price), SuperMember(0.8*price). They have the different discount when they buy book from the sys

11、tem.You must use strategy pattern when you design the system.Firstly, you should give the UML class diagram with the strategy pattern. (5 points)Secondly, you should write the code for each class you design in the UML. (15 points)Thirdly, you should write a class named Test which include a main() me

12、thod, we support there are three clients named Tom(VIPMember), John(NormalMember) and Mike(SuperMember). The class you write can sell a book to the three clients. We support the price of the book is 150.(5 points) Your UML is here.o:线 Place your code here. (You can write the codes in the back surfac

13、e of the paper or the next paper, but you must write your code clearly.)Fig 1 Student Information Management Applicationo:线IV. Create an Student information Management application as shownFig. 1 using Swing GUI. Part of the work has been done. You should finish the code. (30 points)import java.awt.*

14、;import java.awt.event.ActionListener;import java.awt.event.ActionEvent;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.PrintWriter;import javax.swing.*;/*Demonstrates the component link JTextField. This class extendsclass link JPanel.*/public class StudentManagem

15、ent extends JPanel private JLabel labelName;private JLabel labelNo;private JLabel labelGender;private JTextField textFieldName;private JTextField textFieldNo;private JTextField textFieldGender;JButton addStudentButton;JButton submitButton;public static void main(String args) JFrame frame = new JFram

16、e(学生信息增加”)；frame.setContentPane(new StudentManagement();frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);frame.pack();frame.setVisible(true);Creates three link JLabel components , three link JTextField班级O学号姓名components, one textArea and two buttons here.*/public S tudentManagement() setLayout(ne

17、w GridLayout(5, 1);setB ackground(Color.white);/Place your code here, Create the components. (5 points)封:/ Place your code here, Add components to the container. (5 points)class AddStudentListener implements ActionListener(public void actionPerformed(ActionEvent event)(/ Place your code here, add st

18、udent information into textarea. (6 points)/ Place your code here, regist the AddStudentListener to addStudentButton. (4 points) class storeStudentListener implements ActionListener(public void actionPerformed(ActionEvent event)(/ Place your code here. Store the Students which in the textarea into f

19、ile output.txt. Try to catch the Exception. (6 points)/ Place your code hereegist the storeStudentListener to submitButton. (4 points)In the car rental system, the user should be able to: V. Read the following Car Rental System Specification and Create a UML class Diagram for this System. （15 points

20、）Car Rental System SpecificationThe car rental system maintains customers, cars and rental records.New customers may register as users of a car rental company by providing their personal information such as name, address and telephone number. For each new customer, the system provides a rental card

21、with a bar code（条形码）representing their his/her unique identification number. Each car also has a bar code representing its unique identification number. When a customer wants to rent a car, he/she presents his/her rental card, together with the chosen car. A rental record then is added to the system

22、. When a car is returned by a customer, the cars bar code is scanned so that the systems records can be updated as necessary. The system can add cars to, or withdraw cars from （报废的车辆不再出租，收回）, the recorded stock by supplying appropriate details. In addition, the system can generate a management report, on request