Description
Question 1
Your task is to write a letter to me (your respective lecturer) that has two parts.
Part 1:
In the first part of your letter, you will introduce yourself. An example is as below:
Thursday, 8 February 2018.
My name is XXXX (your name) with matrix number, XXXXX (your matrix number). I am
majoring in XXXX (your majoring). This is my first/second/third (specify) time taking the
Data Structure subject. At the moment, I am feeling XXXX (your emotion) about taking this
subject. This is because XXXX (describe the cause of your emotion about taking DS).
I acquired XXXX (your grade) for my previous Programming 1 course. It’s not too bad. So, I
think I can manage to get XXXX (the expected grade) for this DS subject this term. In order
to do well in the subject, I will XXXX (what will you do). Wish me luck!!!
1. Create a text file that introduces you to me. Name this file as yourname_matrixNum.txt (i.e.,
Unaizah_WXX12345.txt). The content of the first part of your letter can be adapted from the
example given above. (However, you are free to write on your own, so long you retain the
information). Write/type directly on a Notepad and save them as a text file format (.txt).
2. Create a program to read the file (yourname_matrixNum.txt). Display the contents of the file
in the output console. [Project name : ReadMyLetter_matrixNum]
Part 2:
You will append your letter (from part one) with a second part of the letter dated the day of the
last lab session of DS (Thursday, 10 May 2018). Assuming you fast forward to the future, reflect
and describe:
WIA1002/WIB1002 Lab 1 Sem. 2, 2017/2018
Page 2
How you have performed in the class?
Are you happy with your performance?
What has learning DS taught you / what did you learn from DS?
Is there any change to your target grade?
What you did well during the course?
What could have been done better during the course?
3. Write the second part of the letter using the input from Console (Do not type on the txt file
directly). To do this, you are required to modify your program above (2) by importing a
Scanner class to read input from the keyboard. Your description outlined above should be
appended (not overwritten) to the first part of your letter. Display the contents of the letter
(part 1 and part 2) in the output console. The final letter should be something like below:
Thursday, 8 February 2018.
My name is XXXX (your name) with matrix number, XXXXX (your matrix number). I am
majoring in XXXX (your majoring). This is my first/second/third (specify) time taking the
Data Structure subject. At the moment, I am feeling XXXX(your emotion) about taking this
subject. This is because XXXX (describe the cause of your emotion about taking DS).
I acquired XXXX (your grade) for my previous Programming 1 course. It’s not too bad. So, I
think I can manage to get XXXX (the expected grade) for this DS subject this term. In order
to do well in the subject, I will XXXX (what will you do). Wish me luck!!!
Thursday, 10 May 2018
It’s me again. Finally, it’s the end of the term and the DS class has finished! I think I did
XXX (your performance) in this course. ……….
Question 2
1. Write a program to read a text file (namely, text1.txt) that has a sequence of characters that are
delimited (separated) by special character (i.e., comma, semi colons, spaces, etc.). The number
of characters can vary from 1 to N. Your task is to :
a. Calculate the number of characters retrieved from text1.txt without the special
characters.
b. Display all characters from the text file without the special characters.
2. Modify your program to perform 1a. and 1b. above on text2.txt, text3.txt and text4.txt
WIA1002/WIB1002 Lab 1 Sem. 2, 2017/2018
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Example of text1.txt (character separated by comma)
S,U,C,E,S,S
A,c,c,o,m,p,l,i,s,h,m,e,n,t
B,r,i,l,l,i,a,n,t
C,r,e,a,t,i,v,e
D,e,t,e,r,m,i,n,a,t,i,o,n
E,n,c,o,u,r,a,g,i,n,g
F,o,c,u,s
Example of text2.txt (numbers separated by comma and space)
15, 2, 9, 78, 33, 61
198, 523, 91, 42, 13, 77
34, 45
Example of text3.txt ((real numbers separated by semicolon and space)
4.33; 2.51; 6.11; 2.33; 6.31
1.95; 3.67; 2.22
6.84; 5.04; 9.56; 0.92
Example of text4.txt (alphabets separated by numbers)
abc123def456ghi789jkl
Question 3
Implement a class named Account that contains:
■ A private int data field named id for the account (default 0).
■ A private double data field named balance for the account (default 0).
■ A private double data field named annualInterestRate that stores the current interest rate
(default 0). Assume all accounts have the same interest rate.
■ A private Date data field named dateCreated that stores the date when the account was
created.
■ A no-arg constructor that creates a default account.
■ A constructor that creates an account with the specified id and initial balance.
■ The accessor and mutator methods for id, balance, and annualInterestRate.
■ The accessor method for dateCreated.
■ A method named getMonthlyInterestRate() that returns the monthly interest rate.
■ A method named getMonthlyInterest() that returns the monthly interest.
■ A method named withdraw that withdraws a specified amount from the account.
■ A method named deposit that deposits a specified amount to the account.
(Hint: The method getMonthlyInterest() is to return monthly interest, not the interest rate.
Monthly interest is balance * monthlyInterestRate. monthlyInterestRate is
annualInterestRate / 12. Note that annualInterestRate is a percentage, e.g., like 4.5%. You need
WIA1002/WIB1002 Lab 1 Sem. 2, 2017/2018
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to divide it by 100.) Write a test program that creates an Account object with an account ID of
1122, a balance of $20,000, and an annual interest rate of 4.5%. Use the withdraw method to
withdraw $2,500, use the deposit method to deposit $3,000, and print the balance, the monthly
interest, and the date when this account was created.
Question 4
An Account class was specified in Question 3. Design a new Account1 class as follows:
■ Add a new data field name of the String type to store the name of the customer.
■ Add a new constructor that constructs an account with the specified name, id, and balance.
■ Add a new data field named transactions whose type is ArrayList that stores the transaction
for the accounts. Each transaction is an instance of the Transaction class. The Transaction class
is defined as shown in figure below.
■ Modify the withdraw and deposit methods to add a transaction to the transactions array list.
■ All other properties and methods are the same as in Question 3.
Write a test program that creates an Account1 object with annual interest rate 1.5%, balance 1000,
id 1122, and name George. Deposit $30, $40, and $50 to the account and withdraw $5, $4, and $2
from the account. Print an account summary that shows account holder name, interest rate, balance,
and all transactions.
