Object Oriented Software Development

MITS4002

OBJECT-ORIENTED SOFTWARE DEVELOPMENT

Project (25%) Tattslotto

Programming Project Part 1: Arrays & Inheritance

Marks: The project is assessment for 25% of final mark for the subject. The project is composed of two parts: Part 1 and Part 2.  

Problem Description 

This project is based on the design, and implementation in Java, of the seven different Lottery games being Saturday Tattslotto, Oz Lotto and Powerball. Details of these games can be found at http://www.thelott.com

In Part 1 of the project, you are asked to use arrays and inheritance to code versions of these games and in Part 2 to create an appropriate GUI that writes to a report file.

Note: GAMBLING can be a serious problem for some people. 

Your lecturer DOES NOT encourage you to gamble.

Summary of Some of the Lottery Games (From the Help pages of the above web site)

Game Day Description Tattslotto Saturday 45 balls numbered 1 to 45, from which 8 balls are randomly selected. The first 6 balls are the winning numbers and the last two balls drawn are the supplementary numbers. Oz Lotto Tuesday 45 balls numbered 1 to 45, from which 9 balls are randomly selected. The first 7 balls are the winning numbers and the last two balls drawn are the supplementary numbers. Powerball Thursday 35 balls numbered 1 to 35 from which 7 are randomly selected. An eighth ball, the Powerball, is then drawn from a separate machine containing 20 balls numbered 1 to 20.

You will notice from your research and examination of the table that all games have several things in common. All games • have a name, • run on a day of the week • have a set of randomly generated numbers.

Also, each of the randomly generated numbers have a minimum and maximum possible value, for example: For Powerball, the minimum value is 1 and the maximum value is 35.

An abstract class, LuckyGame can be used to represent the generic concept of a game of chance. A suitable partial design is shown in the following UML diagram. In the UML diagram: • The LuckyGame class represents the generic concept of a game of chance and therefore is to be declared as an abstract class. It contains two abstract methods setNumberOfRandoms( ) and collectUserInput (String input). The LuckyGame class also contains an array of String which is used to record the randomly generated numbers used by each object of LuckyGame type.

 • The class TattslottoGame is a LuckyGame and it thus should implement code for LuckyGame’s two abstract methods as well as its own constructor and any other methods. 

• The games SaturdayTattslotto and Oz Lotto are all instances of the class TattslottoGame. 

• You can implement the remaining class games in any manner you believe appropriate. For example, class PowerBallGame can be implemented using either using 

Option 1: the class PowerBallGame is a LuckyGame and thus should implement code for LuckyGame’s two abstract methods as well its own constructor and other methods. 

Option 2: the class PowerBallGame is a TattslottoGame and thus should implement code for its own constructor and other methods. 

• You have been provided with some code for the class TestGames, which is a text-based application used to create instances of games and test all of their respective behaviours. 

• To collect user input for all games, a class UserInput is needed. It should collect user input and deal with any problems in the input, such as repeat numbers or numbers outside the possible range of values.

Code for TestGames

// A class that tests the instances of each class of game //************************************************************* ******* class TestGames { public static void main ( String [ ] args )  {   final int NO_OF_GAMES = 7 ;   LuckyGame [ ] games = new LuckyGame [NO_OF_GAMES];   TattslottoGame myGame = new TattslottoGame ("Tattslotto", "Saturday", 1 , 45 ) ;   TattslottoGame OzLotto = new TattslottoGame ( "OZ Lotto", "Tuesday", 1, 45 ) ;   TattslottoGame WedsLotto = new TattslottoGame ( "Tattslotto", "Wednesday", 1, 40 ) ;   Tatts2Game tatts2 = new Tatts2Game ("Tatts2", "everyday", 1 , 99 ) ;   PowerBallGame powerBall = new PowerBallGame ("PowerBall", "Thursday", 1 , 45 ) ;   ……………………………………………………………………………………..// Super 66 instance   ……………………………………………………………………………..// Pools instance   games[0] = myGame ;   games[1] = OzLotto ;   games[2] = WedsLotto ;   games[3] = tatts2 ;   games[4] = powerBall ;   ……………………………………………………………………………………..// Super 66 instance   ……………………………………………………………………………..// Pools instance   for (int i = 0 ; i < NO_OF_GAMES ; i++)   { System.out.print ("\n\n*******************************************\n" );    System.out.print ("Input your numbers for " + games[i].getDay( ) + " " + games[i].getName( ) + " :- " ) ;    String input = Keyboard.readString( ) ;    games[i].collectUserInput( input );    System.out.println ( games[i] ) ;   }// end for

}//end main  

Sample output 

An example of some output from a run of TestGames. NOTE: ALL OUTPUTS ARE ONLY SUGGESTIONS and should be used as a guide to your implementations.

******************************************* Input your numbers for Saturday Tattslotto :- 1 2 3 3 4 78 1 5 6 Invalid input Saturday Tattslotto numbers are: 31 29 1 6 10 41 supplementary numbers: 25 38 6 user picks between 1 and 45 are 1 2 3 4 5 6 No. of winners 2 + 0 supps match ******************************************* Input your numbers for Tuesday OZ Lotto :- 1 2 3 4 5 6 7 Tuesday OZ Lotto numbers are: 2 29 19 21 36 31 40 supplementary numbers: 5 35 7 user picks between 1 and 45 are 1 2 3 4 5 6 7 No. of winners 1 + 1 supps match ******************************************* Input your numbers for Thursday PowerBall :- 1 2 2 3 4 5 5 Invalid input The user chosen powerball is 5 Thursday PowerBall numbers are: 1 32 34 5 35 33 and the POWERBALL is:- 5 7 user picks between 1 and 35 are 1 2 3 4 5 6 7 and the user chosen POWERBALL is:- 5 No. of winners 2 and you have the POWERBALL etc…..

Programming Project

Part 2: Graphical User Interfaces/Applets & Files & Exceptions

In Part 1 of the project, you are asked to use arrays and inheritance to code versions of 7

Lottery games. In Part 2, using swing classes wherever possible, you need to create an applet

for players. The applet should allow a player to choose and run a game of their choice and find

out the results of their game. Each time a game is played, the applet writes information about

the game to a file called report.txt. This information would be similar to that shown as sample

output for Part 1.

For example,

report.txt

Saturday Tattslotto numbers are:

31 29 1 6 10 41 supplementary numbers: 25 38

6 user picks between 1 and 45 are

1 2 3 4 5 6

No. of winners 2 + 0 supps match

If there are any problems creating this file, then the applet reports the problem to the user.

NOTE: It is not expected that you should need to rewrite any of the classes from Part 1 of the

Project. Rather you will create instances of the relevant classes when you need them for

Part 2. The application for this project should create at least one new class LuckyGameApplet,

however a good design should divide the computational workload and

create/use classes where needed. You may even decide to use Threads and create animation!

Applet Appearance

The design of the applet’s appearance is totally up to you; the more colourful and well

organized, the better (use layout managers). Choose components that reduce user error, e.g.,

use check boxes or radio buttons when asking the user to choose the game they wish to play.

As the designer, the functionality of the applet is also up to you, as long as the basic problem

description is covered. Feel free to add any extra features that you feel are useful. For

instance, you may want to add a quick pick selection for the player, or continually add data to

the file over a number of games, run statistics of the games played, etc., etc.

It is necessary to draw a component hierarchy for your final Applet design.

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