Review Topics:1583-2120

CSCI-2125Spring 2003

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Review Topics:1583-2120


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GUI’s

• GUI construction: basic structure of the architecture of a GUI.

• The M-V-C architecture: goal. Structure.

• Applications with two or more guis.


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Exceptions

• definition

• raising

• handling

• kinds of exceptions: checked exceptions, unchecked exceptions.

• Built-in exceptions.

• Important correctness issue with the possibility of exceptions: inconsistent object state.


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Recursion

• functional recursion

• structural : object recursion


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Lists

• List class: best specification provided in book.

• Formation of specific XXXList classes

• Sorting

• generalized sort: parameters

• Searching

• generalized searching.


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Reading from book

• Chapter 21

• You should be able to do any of the exercises in that chapter.


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Abstraction

• Interfaces, abstract classes.

• Inheritance and composition

• Measures for class definition correctness:

• cohesion, coupling.

• Pre-conditions, post-conditions, class invariants. Programming by contract.

• Software development cycle: iterative cycle to specify-design-implement-test.


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Testing of software

• unit testing; functional testing.

• JUnit.


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Algorithm correctness

• relationship between code and class invariants

• state change on the face of possible exceptions

• loop invariants


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Java I/O

• The package ooj.basicIO

• BasicFileReader

• BasicFileWriter


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Problems• Class problem: calculator


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Homework problemDue: Jan 27th

• Write a program that allows a user to get a fortune cookie. • The program has a whole bunch of cookies and selects one at random

for delivery.• The cookies are locked. The user must provide a 3-digit key that opens

the repository of cookies to get one. Each digit is entered one at a time.• Besides getting cookies, when the program is running the user can:

– Add cookies to the repository.– Remove cookies from the repository.– Find all cookies with a given string.– Change the combination of the repository. User is queried for current

combination and new combination.

• To maintain the repository of cookies user should be asked for key as well.

• Program maintains a list of all cookies generated while executing. User opens this view only when desired.


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Homework problem

• When user enters data, program must properly react for illegal or invalid data.

• If a user attempts to open/change repository 3 times in a row and fails, program should shut down with appropriate error message.

• User interface is a gui interface with buttons or menus that allows user to access the functionality of the program. A panel is produced with the cookie and a dismiss button. Cookies that are palindromes must be displayed with special effects or with an extra message indicating so.

• Program development: all model classes should be tested via the development of an automatic tester.

• List of cookies is maintained in a text file that program reads at the start of execution and writes to at the end of execution.

• Initial combination is 987.


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What to submit

• Each model class with a tester.• both source code and binary for entire program in a diskette. • A printed copy of all source files.• Place program in a directory with your last name. In that directory

have a directory called cookies. Inside that directory you will have a java class containing the main under the name Generator. The package statement of that class is

package yourLastName.cookies;• To compile a class with such package:

javac yourLastName/cookies/Generator.java• For execution enter:

java yourLastName.cookies.Generator


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On palindromes

• Strings that read the same forwards and backwards, disregarding punctuation and white text if any.

• Examples:

– Madam

– A dog, a plan, a canal: pagoda!(adogaplanacanalpagoda)

– Ah, Satan sees Natasha(ahsatanseesnatasha)

• Use recursion to determine if a string is a palindrome.

Documents

Review Topics:1583-2120