Deadline: 11.59.59, Wednesday 8th November 2017
Submission will be via the online submission system.
You should refer to the Undergraduate Students’ Handbook for details of the
departmental policy regarding late submission and university regulations regarding
plagiarism; the work handed in must be entirely your own.
It is expected that marking of the assignment will be completed within 4 weeks of
the submission deadline.
Introduction
This assignment involves writing two separate Java applications. Both
applications must display your name and registration number. They must be
hand-coded by you; if you use IntelliJ Idea or any other IDE you must not use the
GUI Designer or any similar tool. The files should contain brief comments.
WARNING AND ADVICE ABOUT POSSIBLE ACADEMIC OFFENCES
Your solutions should be your own unaided work. You can make use of any of the
programs from the CE203 lecture notes and the lab templates on Moodle. You may
use any features from the Java Standard Edition Application Programming
Interface (Jave SE API) including those not covered in CE203.
You must NOT use any third-party classes (e.g. classes that are not provided as
part of the Java SE download). If you use any other sources, you must clearly
indicate this as comments in the program, and the extent of the reference must be
clearly indicated. For more information, please see the University pages
on plagiarism and the Academic Offences Procedures.
DO NOT COPY PROGRAM CODE FOR THIS ASSIGNMENT FROM ANOTHER
STUDENT OR FROM THE INTERNET OR FROM ANY OTHER SOURCES. DO NOT
LET OTHER STUDENTS COPY YOUR WORK
Submission
Since you will be required to submit all of the files in a single folder you should
not reuse any class names from exercise 1 in exercise 2.
CE203 ASSIGNMENT 1 2017
Page 2 21/10/2017
Exercise 1 (50%)
A colour may be specified by its RGB value – the amount of red, green and blue it
contains. These amounts are integers between 0 and 255. For example, red is
represented by (255, 0, 0), blue by (0, 0, 255) and yellow (which is made up from
red and green) by (255, 255, 0). White is (255, 255, 255) and black is (0, 0, 0). The
Color class has a constructor with 3 arguments that allows a user to create a
Color object by providing the RGB values.
Write, in a file called CE203_2017_Ex1.java, a frame-based
application that allows the user to specify RGB values in three text fields,
and, when a button is pressed, displays your name and registration number
in the chosen colour. The button and the input fields should be placed at the
bottom of the frame, and the text should be written on a panel positioned at
the centre (on both the horizontal and vertical axis).
The application should initially display the following welcome message (in
blue) on the centre panel: “CE203 Assignment 1, submitted by:“ (this should
be followed by your name and registration number).
If, when the button is pressed, the content of any of the text fields is not an
integer, the invalid field(s) should be cleared and an appropriate message
should appear on the centre panel; text fields containing integers should,
however, never be cleared.
If any of the text fields contain a value less than 0, the value 200 should be
used in its place when generating the colour – the displayed value in the text
field should also be changed to 200. Similarly, if any of the fields contains a
number greater than 255, the value 255 should be used and displayed.
Add a “Reset” button at the top of the application which, if pressed, will
result in all text fields being emptied and the initial welcome message being
displayed.
Any possible exceptions should be captured by the program.
CE203 ASSIGNMENT 1 2017
Page 3 21/10/2017
Exercise 2 (50%)
Write, in a file called CE203_2017_Ex2.java, a frame-based application that
allows the user to store a list of words. The layout should be such that any buttons
will be displayed at the top of the panel, user input is provided in a text field at the
bottom and any system output will be displayed in the centre. The application
should provide buttons that allow the user to
add a word to the list (the word to be added is provided in a text field at the
bottom of the application).
display all of the words from the list that end with a specified letter (this
method should be case-insensitive, e,g, no matter whether the user input is
'A' or ‘a’, all words ending with 'a' should be displayed)
search the list for a word (that is provided in the text field) and display how
many times it is found and the positions in the list in which it is found; if
however the text field is empty when this button is pressed, then the system
should display the total number of all words in the list (together with an
appropriate message)
remove from the list the last occurrence of a word
remove from the list all occurrences of a word
clear the list
The list may contain duplicate entries. Words may contain only letters, numbers,
and hyphens (-) and must begin with a letter.
For each action specified above an appropriate message should be displayed on the
centre panel confirming the action, e.g.
“Word ‘toast’ has been added to the list”.
An appropriate error message should be displayed if any of the actions failed, e.g.
“The string ‘12’ was not added to the list as it is not a valid word.”
The list should be implemented using a LinkedList.
You should aim to make your user interface easy to use.
CE203 ASSIGNMENT 1 2017
Page 4 21/10/2017
Commenting the Programs
The programs should contain brief comments indicating precisely what each
method does and what each instance variable is used for. You should not write any
comments stating what individual lines of code do; in places it may be appropriate
to state what a block of code does (e.g. “check that the input is a valid word”).
The programs should be laid out neatly with consistent indentation.
Submission
You are required to submit the source code files (CE203_2017_Ex1.java and
CE203_2017_Ex2.java) and all of the .class files generated by the
compiler. All of the files should be placed in a single folder, which should then be
zipped for submission to the online system, i.e. the submission should be a single
file in zip format. Other formats (e.g. rar format) and submissions without source
code will not be accepted and will result in a mark of zero.
Marks will be awarded for following all the requirements (including naming of
files, layout of the interface etc.) and applying object-oriented programming
principles appropriately.