M257 TMA Spring 13-14 Page 1 Faculty of Computer Studies Course Code: M257 Course Title: Putting Java to Work Tutor Marked Assignment – Spring 13-14 Cut-off Date May 6, 2014 Total Marks:100 converted to be out of 20 Contents: TMA Instructions …………………….………… 2 Question 1 ……………………………………… 3 Question 2 ……………………………………… 6 Plagiarism Warning: As per AOU rules and regulations, all students are required to submit their own TMA work and avoid plagiarism. The AOU has implemented sophisticated techniques for plagiarism detection. You must provide all references in case you use and quote another persons work in your TMA. You will be penalized for any act of plagiarism as per the AOUs rules and regulations. Declaration of No Plagiarism by Student (to be signed and submitted by student with TMA work): I hereby declare that this submitted TMA work is a result of my own efforts and I have not plagiarized any other persons work. I have provided all references of information that I have used and quoted in my TMA work. Name of Student: Signature: Date: M257 TMA Spring 13-14 Page 2 TMA Instructions This TMA assesses your work on Units 1-7 of M257. The marks allocated to each part of a question are indicated in the margin. The total marks for each question are shown at the beginning of each question. For TMA questions that require coding, a number of marks may be awarded for the style of your Java code. This means that we expect you to be consistent and to follow good practice in the naming of identifiers and layout In all questions that require coding Question 1 Part 1 & Question 2, you should do the following: 1- You should develop the required programs in NetBeans. 2- You must create ONE project for all TMA questions in one package, the default location for NetBeans projects under Windows 7 are: Documents/NetBeansProjects. You are required to create a Word file named M257_TMA_Spring13-14_ID_Name. Then you are required to do the following: Question1 Part 1: copy and paste the code and add one snap-shot for the results Question1 Part 2: write the answers of the questions. Question1 Part 1: copy and paste the code and add 3 snap-shots for the results The TMA for the course has been uploaded to the LMS. You should start working on it right away. Please note the following when working on the TMA: • No group work is allowed for the TMA. Each student must submit his/her own solution individually. • Copying the answers from any source other than your own work will be considered as plagiarism. • Use your own words to answer essay questions. • Read carefully the second page of the TMA for important instructions. After you finish solving the TMA,You have 2 Submissions Links: 1- The Regular Submission Link: you need to submit to the regular submission link a compressed file (e.g. zip file) which includes the following: your NetBeans project folder (in Windows 7, you can find this under Documents/NetBeansProjects), 2- The Turnitin submission Link: You need to submit a document Word file including all your answers to all questions according to the guidelines on the cover page of the TMA. M257 TMA Spring 13-14 Page 3 Question 1 [80 marks] This assignment is an exercise in fundamental Java concepts such as: classes, constructors, methods, composition, abstract, interfaces, basic control structure, HashMap collection handle reading from TXT file and handle exceptions . This question includes two parts, each of which is simple if done according to the specifications given in the exercise. Part 1: Write the Java programs according to the following specifications: [60 marks] Part 1.1 Develop an interface Colourful to the following specifications: [2 marks] It includes one public method assignMyColour( String colour). When this method is implemented, it should set the colour of its object by the given value as its argument. Part 1.2 Develop a public class Point to the following specifications: [6 marks] 1) The class has two private instance variables: int x and y. 2) The class has a multi-argument constructor that sets the values of its instance variables to the given values. 3) The class has a zero-argument constructor that sets the values of its instance variables to their default values. It should invoke the multi-argument constructor. 4) The class has the getter and setter methods for the instance variables. Part 1.3 Develop a public abstract class Shape to the following specifications: [8 marks] 1) The class implements the Colourful interface. 2) The class has one private instance variable: Point p1. 3) The class has a one-argument constructor that creates and sets the value of its instance variable to the given value of p1. 4) The class has to override the Object’s toString() method in order to return a string with representation of the Point instance variables as: (x, y) 5) Implement any methods that are needed. Part 1.4 Develop a public class Oval to the following specifications: [12 marks] 1) The class inherits the Shape class. 2) The class has the following private instance variables: width and height as an integer, myColour as string, counterO as an integer which keeps one copy for all instantiated objects of oval and counts their numbers. 3) The class has a multi-argument constructor that creates and sets the values of its instance variables to the given values. It should invoke its super-class constructor. Oval (Point p, int width, int height, String colourName) 4) The class has the getter and the setter methods for the private instance variables width, height, counterO. 5) The class has to override the Object’s toString() method in order to return a string representation of the Oval instance variables as: The oval in (10 , 10) its width is 80 its height is 90 its colour is Red 6) Implement any methods that are needed. Part 1.5 Develop a public class Rectangle to the following specifications: [12 marks] 1) The class inherits the Shape class. 2) The class has the following private instance variables: Point p2, myColour as string, counterR as an integer which keeps one copy for all instantiated objects of rectangle and counts their numbers. M257 TMA Spring 13-14 Page 4 3) The class has a multi-argument constructor that creates and sets the values of its instance variables to the given values. It should invoke its super-class constructor. Rectangle (Point p1, Point p2, String colourName) 4) The class has the getter and the setter methods for the private instance variable counterR. 5) The class has to override the Object’s toString() method in order to return a string representation of the Rectangle instance variables as: The Rectangle starts at (0 , 0) and ends at (100 , 100) its colour is green 7) Implement any methods that are needed. Part 1.6 Develop a public class MyShapes to the following specifications: [10 marks] 1) The class has one private instance variable HashMap myShapes, which represents the collection of shapes from class Shape and its subclasses. 2) The class has a zero-argument constructor that creates its instance variable myShapes. 3) The class has the method void addOval( String type, Oval oval). It creates the key of the Oval object by concatenating its type by its counter, and then it adds the Oval object into the myShapes collection. 4) The class has the method void addRectangle( String type, Rectangle rectangle). It creates the key of the Rectangle object by concatenating its type by its counter, and then it adds the Rectangle object into the myShapes collection. 5) The class has the method String showShapes(), which returns a string representation for all shapes in the collection or a message “There are no shapes in the collection” if the collection is empty. 6) Implement any methods that are needed. Part 1.7 Develop a public class TestMain to the following specifications: [10 marks] 1) The class has a static main method. 2) The class instantiate the MyShapes class. 3) The class has to fill myShapes instance object by reading the values from the TXT file (C:/Spring13-14Shapes.txt), which is provided in the TMA folder. 4) It should check whether the type of the shape is Oval or Rectangle and then it should use the corresponding methods that are needed to add the objects into the myShapes object. 5) The data includes the following For Oval: the type of the object followed by the Point P1’s coordinates width, height and colour. For Rectangle: the type of the object followed by Points P1 and P2 coordinates, and its colour. 6) Finally, it should display on the screen the shapes in myShapes and the number of Rectangle and Oval objects. 7) Implement any methods that are needed. M257 TMA Spring 13-14 Page 5 Part 2: answer All the following Questions regarding to above classes specifications: [20 marks] 2.1- What if any the modifications are needed, if the following methods are added to the Colourful Interface? Explain your answer. [2 marks] void makeItRed(); void makeItGreen(); void makeItBlue(); 2.2- How did you deal with the method public void assignMyColour(String colourName) in each of the Shape, Oval and Rectangle classes? Explain your answer. [2 marks] 2.3- Is it legal to write the following statements in the TestMain class? Explain your answer. Shape shape1; Shape shape2= new Shape(); [2 marks] 2.4- What is the relationship between the following classes? Point class and Shape class Oval class and Shape class [2 marks] 2.5- How did you handle the Exceptions in TestMain class? What are the two methods to deal with the exceptions in the Java Language? [5 marks] 2.6- Suppose that the first line in the TXT file (C:/Spring13-14Shapes.txt) is updated as Oval M 10 80 90 Red What will happen? Explain the problem and express your solution to solve the problem and implement it in the code. [5 marks] 2.7- Explain how to sort a Map in Java. You are required to explain the mechanism for sorting Map in Java. Checkout the following links to help you make your answer. [2 marks] docs.oracle/javase/6/docs/api/java/util/HashMap.html docs.oracle/javase/6/docs/api/java/util/SortedMap.html docs.oracle/javase/7/docs/api/java/util/SortedMap.html docs.oracle/javase/tutorial/collections/interfaces/sorted-map.html docs.oracle/javase/tutorial/collections/interfaces/sorted-map.html M257 TMA Spring 13-14 Page 6 Question 2 [20 marks] This assignment is an exercise on using and building GUI interfaces, writing event driven programs, along with using flow control structures, and JOptionPane classes. You are required to build a GUI interface MyFrameMain to be able to input the required values to draw an oval or a rectangle, select the colour and the number of repeated shapes. The GUI interface should appear as in Figure 1 below, according to the following specifications: • Set its size to 700x500. • Set its title to your AOU-ID and your name. • The frame has Border Layout. It consists of three main JPanels, North, Centre, South • The North JPanel, user can do the following: The user can draw the outline of an oval using the current colour. The result is a circle or an ellipse that fits within the rectangle whose top lefthand corner is specified by the first two arguments, whose width is given by the third argument and whose height is specified by the final argument. The values will be filled in using four JTextFields. The oval will be displayed once the user clicks on Add Oval JButton. The user can draw the outline of the specified rectangle using the current colour. The top left-hand corner of the rectangle is defined by a pair of x and y-coordinates. The final two arguments give the width and height. The values will be filled in using four JTextFields. The Rectangle will be displayed once the user clicks on Add Rectangle JButton. The user can select one of the three colours using JRadioButton group. Red is the default, with green and blue available as well. The user can select the number of repeated shapes up to 10 from the JList. The code repeats drawing the shape many times by adding a fixed number to the values of x and y to shift the position of the new shape. The user can draw the two shapes by filling the values of the two shapes and then clicking on Add Both JButton • The Centre JPanel is the drawing area where the required shapes will be displayed. • The South JPanel contains two JButtons Clear button which clears all values in all JTextFields once the user clicks on it. Exit Button which terminates the program once the user clicks on it. • An appropriate event listener should be used and the buttons should implement the listener objects for all buttons. • paint() and repaint() methods should be implemented to be invoked to draw the shapes. • The class should have a main method to instantiate the Frame. More details are added in the figures below M257 TMA Spring 13-14 The GUI interface MyFrameMain Figure 1 Draw one Red Oval Figure 2 Draw 3 Blue Oval Figure 3 Draw 3 Red Rectangle Figure 4 Page 7 M257 TMA Spring 13-14 Page 8 Drwa Both shapes 4 blue ovals and 4 blue rectangles Figure 5 “End of the Assignment”
Posted on: Sun, 16 Mar 2014 10:54:58 +0000
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