Vending Machine JAVA Program Assignment Help

Vending Machine JAVA Program Assignment Help

Please do the following to complete this assignment.

Purpose:

The purpose of this project is to provide non-trivial practice in the use of Java object-oriented programming features to implement an object-oriented design and have a bit of fun doing it.

Resources Needed:

You will need a computer system with Java 7 or greater SE edition run-time and Java Development Kit (JDK). You may optionally use a Java IDE for example NetBeans, Eclipse, etc. However application builders are not allowed.

Submitted Files:

Design and Analysis:

This is an informal essay-style single-spaced word-processed document. The file formats accepted will be announced at project assignment. The length of the document should be between 1 and 1.5 pages. The following subjects should be discussed in this order:

1. General program design. How is the program organized? What major data structures were used? How did you divide the functionality among your classes? How are commands processed? Etc.

2. What alternative approaches were considered and why were they rejected?

3. What did you learn from doing this project and what would you do differently?

Source files:

Each public class must be contained in a separate Java source file. Only one source file will have a main() method and this source will be named VendingMachineSimulator.java. Other source/class names are up to you following the guidelines specified so far in the course.

The format of the Java source must meet the general Java coding style guidelines discussed so far during the course. Pay special attention to naming guidelines, use of appropriate variable names and types, variable scope (public, private, protected, etc.), indentation, and comments. Classes and methods should be commented with JavaDoc-style comments (see below). Please use course office hours or contact the instructor directly if there are any coding style questions.

JavaDocs:

Sources should be commented using JavaDoc-style comments for classes and methods. Each class should have a short comment on what it represents and use the @author annotation. Methods should have a short (usually 1 short sentence) description of what the results are of calling it. Parameters and returns should be documented with the @param and @return annotations respectively with a short comment on each.

JavaDocs must be generated against every project Java source file. They should be generated with a –private option (to document all protection-level classes) and a –d [dir] option to place the resulting files in a javadocs directory/folder at the same level as your source files. See the JavaDocs demonstration for more details.

Submit file:

The submit file is to be a Zip file containing your design and analysis document, your Java sources, and your javadocs directory/folder. Any appropriate file name for this Zip file is acceptable.

If you know how to create a standard Java JAR file, this is also acceptable for your source code. However, make sure you include the source code in your JAR file.

Program Specification:

1. Create a new multi-class Java program which implements a vending machine simulator which contains the following functionality:

A) At program startup, the vending machine is loaded with a variety of products in a variety of packaging for example soda/tonic/Coke in bottles, peanuts in bags, juice in cartons, etc. Also included is the cost of each item. The program should be designed to easily load a different set of products easily (for example, from a file).

Also at program startup, money should be loaded into the vending machine. Money should consist of different monetary objects for the specified currency for example $1 bills, $5 bills, quarters, dimes, etc. Your program should be designed to use different national currencies easily (for example the Euro) without changing source code. Money should be maintained as paper bills and coins, not just amounts.

B) A menu of commands must be provided. At a minimum the menu should consists of the following commands:

1. Display the list of commands

2. Display the vending machine inventory. For each item, this command should result in displaying a description and current quantity.

3. Display the money currently held in the vending machine.

4. Purchase an item. The result of this selection should be the following actions:

1. Prompt the user to indicate what item to purchase

2. Prompt the user to specify what monetary items are being used for payment (the actual items for example quarters, dimes, etc.), not a money amount

3. If the user specified enough money to purchase the selected item, the item is purchased (deducted from inventory), supplied money is added to the vending machine, and any change is returned in the form of monetary items (quarters, dimes, etc.).

4. If the user did not specify enough money for the selected item, the transaction is aborted with the supplied money not added to the machine (not accepted) and the product not purchased (i.e. the state of the vending machine is unchanged).

5. Exit – exits the program displaying a departing message.

2. Additional points to consider:

A) You can use the Java Standard Edition (SE) API library as supplied by Oracle (AKA Sun) except the collection classes other than String and standard arrays (i.e. not ArrayList, Map, Vector, etc.). These other collections will be covered later in the course.

B) When developing complex classes, consider creating a main() method to test them out. Once tested successfully, delete the main() method.

C) You should generate error messages when appropriate, for example on invalid input values or not enough money supplied for the selected item to purchase. Exceptions will be covered later in the course so for this program displaying appropriate messages on the console is fine.

Other Activates:

1. Observe the presentation on JavaDocs.

2. Observe the Vending Machine Simulator demonstration for an example of one implementation.

3. Create a compressed zipped folder containing your Design and Analysis document, your Java source code files, and your javadocs folder.

4. Submit your compressed zipped folder.

Assignment Rubric:

Part	70%	80%	90%	100%	% of
					Grade
Design and	All but one subject	All assigned	All assigned subjects	All assigned	15%
Analysis	addressed with	subjects address	address with	subjects address
Document	relevant,	with mostly	accurate and	with accurate,
	information. Few	relevant	relevant. Nicely	relevant, and
	minor	information.	formatted document.	insightful
	typographical	Nicely formatted	Document is within	information. Very
	issues. Document	document.	assigned length	nicely formatted.
	is close to assigned	Document is		Document is
	length	close to assigned		within assigned
		length		length
Functionality	Majority of	Most required	Nearly all required	All required	55%
	required function	function parts	function parts work	function parts
	parts work as	work as indicted	as indicted in the	work as indicted
	indicted in the	in the	assignment text	in the assignment
	assignment text.	assignment text	above and submitted	text above and
	One major or 3	above and	documentation. One	submitted
	minor defects. All	submitted	to two minor	documentation.
	major functionality	documentation.	defects.
	at least partially	One major or 3

	working (example	minor defects.
	change provided	All major
	but not correct).	functionality at
	Design document	least partially
	does not fully	working
	reflect	((example
	functionality.	change provided
		but not correct).
Code	Majority of the	Most of the code	Almost all code	All code	25%
	code conforms to	conforms to	conforms to coding	conforms to
	coding standards as	coding standards	standards as	coding standards
	explained and	as explained and	explained and	as explained and
	demonstrated so far	demonstrated so	demonstrated so far	demonstrated so
	in the course (ex.	far in the course	in the course (ex.	far in the course
	method design,	(ex. method	method design,	(ex. method
	naming,	design, naming,	naming, formatting,	design, naming,
	formatting, etc.).	formatting, etc.).	etc.). One to two	formatting, etc.).
	Five to six minor	Three to four	minor coding	Appropriate level
	coding standard	minor coding	standard violations.	of useful
	violations. Some	standard	Appropriate level of	comments.
	useful comments.	violations.	useful comments.	Complete
	Some JavaDocs	Mostly useful	Public class	JavaDocs as
	commenting.	comments.	JavaDocs complete.	specified. Code
	Code compiles	Public class	Code compiles.	compiles with no
	with multiple	JavaDocs	Code compiles with	errors or
	warnings or fails to	complete. Code	no errors or	warnings.
	compile with	compiles with	warnings.
	difficult to	one to two
	diagnose error.	warnings.
Submit	More than one file	All but one file	All file submitted in	All file submitted	5%
package	submitted in	submitted in	correct format but	in correct file
	incorrect format.	correct format.	not in the specified	formats and
	Files not enclosed	Files not	compressed file.	compressed as
	in the specified	enclosed in the		specified.
	compressed file.	specified
		compressed file.

 

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