CSIT121 : Object Oriented Design and Programming - Java Programming with Classes and Objects - IT Assignment Help

Assignment Task :

Objectives:  

Practice java programming with classes and objects, constructors, copy  constructors, enum type, array, ArrayList (generic version), overloaded  methods, passing by reference and etc.  

Task 

In mathematics, a set is a collection of distinct elements and elements in a set are not  in order. Here are some examples of sets:  

(a) A set of integers, e.g. integerSet = {3, 1, 4, 2}  

(b) A set of fruits, e.g. fruitSet = {apple, orange, papaya}  

(c) A set of characters, e.g. charSet = {‘A’, ‘m’, ‘&’}  

We always enclose elements of sets inside a pair of { }.  

Here are some other properties on sets:  

(1) A set can be empty, i.e. no element. We call it empty set. In mathematics, we have  a special symbol to denote empty set. Convenient to our design later, we will use { } to denote an empty set.  

(2) When checking an element is inside a set. We call it “belong to”. 

(3) If a set contains in another set, we call it subset. For example, {1, 2, 3} is a subset  of {2, 3, 4, 6, 1}. Therefore empty set is a subset of every set.  

(4) The cardinal number of a set is the number of elements in a set. 

1 

(5) The union of two sets A and B are all the elements belong to A and B, minus the  duplications. For example, if A = {1, 2, 3} and B = {2, 3, 4, 5}, the union is {1, 2,  3, 4, 5}.  

(6) The intersection of two sets A and B are the common elements of A and B. Using  the example quoted in (5), the intersection is {2, 3}.  

(7) The equality of two sets A and B are all the elements of A are in B and all the  elements of B are in A. Or alternatively, A is the subset of B and vice versa.  

(8) The difference of two sets A and B, for example A – B, is those elements in B should not be in A. For example, if A = {1, 2, 3} and B = {2, 3, 4, 5}, A – B = {1}  and B – A = {4, 5}. 

We have all the required properties for our task.  

In this assignment, our universal set is the 12 enumeration constants of calendar  months. They are  

Jan, Feb, Mar, …, Dec  

Data validation is not necessary in this design, when “I” want to add in a month, you  can assume that this is a valid month in the enumeration constants; i.e. we have  restricted ourselves in a subset of the above 12 months.  

The best way to test your design is to develop an educational system to teach some  basic set theory. All the sets used in your design should be randomly generated by the  system i.e. the sizes (also known as cardinal number, from 0 to 12 elements) and the  elements.  

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