program程序代写、代写Java程序设计

日期：2023-05-17 08:32

Assignment 2: Graphs

Introduction

The goal of this assignment is to program some graph implementations.

Download the file Assignment-2-Source.zip from Brightspace. The

contents of this file include the following important classes and interfaces:

? All the interfaces you require for making a Graph. In particular, the

IGraph interface includes comments describing all of the methods that

a graph implementation should contain (these are in the graph.core

package).

? An implementation of a Linked List, which you will need within your

implementation (this is in the graph.util package and is named

DLinkedList). You should not use built-in Java data structures for this

assignment.

? An example of a Graph implementation: EdgeListGraph. You should

study this file carefully, as the other implementations have some similar

characteristics (this is in the graph.impl package).

? A program called EdgeListTest that shows some examples of code

that can test some of the methods in the graph implementation (this is in

the default package).

You are required to:

1. Implement an Adjacency List graph (in a file called

AdjacencyListGraph)

2. Implement an Adjacency Matrix graph (in a file called

AdjacencyMatrixGraph).

In each case, you should also create a new testing class similar to

EdgeListTest to check that your implementation is correct. Note: The

program I have provided does not test all of the methods in the graph

implementation. You should add some more tests to check other methods (e.g.

removing the vertex HNL should mean that the number of incident edges on

LAX to decrease by one).

Submission

This is an individual programming assignment. Therefore, all code

must be written by yourself. Assignment 1 contained some advice about

avoiding plagiarism in programming assignments.

? All code should be well-formatted and well-commented to describe what

it is trying to do.

? Submit a single zip file to Brightspace, with the following contents:

o The AdjacencyListGraph, AdjacencyMatrixGraph,

AdjacencyListTest and AdjacencyMatrixTest classes.

o If your testing code imports some other graphs from a text file,

this text file may be included also. Do not include any extra Java

files.

Assignment 2 Grading Rubric

This document shows the grading guidelines for Assignment 2 (Implementation of

Adjacency List and Adjacency Matrix Graphs). Below are the main criteria that will be

applied for the major grades (A, B, C, etc.). Other aspects will also be taken into account

to decide minor grades (i.e. the difference between B+, B, B-, etc.), including:

- Readability and organisation of code (including use of appropriate functions,

variable names, helpful comments, etc.).

- Quality of solution (including code efficiency, minor bugs, etc.).

Passing Grades

D Grade

Good implementation of an Adjacency List Graph or Adjacency Matrix Graph, plus some

basic testing.

A “good” implementation is one where all the key methods work correctly in the vast

majority of cases (i.e. some occasional bugs will be tolerated) and the code follows the

right implementation strategy in most cases. Testing should not be simply to copy the

sample tests for the Edge List graph; more tests must be added.

C Grade

Good implementation of an Adjacency List and Adjacency Matrix, plus some basic testing

of both; OR

Good implementation of an Adjacency List or an Adjacency Matrix, plus comprehensive

testing of the graph in question.

“Comprehensive'” testing should make sure that the different operations of the graph(s) are

all tested (e.g. adding and removing vertices and edges, checking that correct vertices are

adjacent or not, incident edges are correct, etc.). It should also check that the

consequences of these operations are correct (e.g. removing a vertex removes its incident

edges also, removing an edge means that its end vertices are no longer adjacent, etc.).

The testing code should automatically detect whether a problem has occurred and can

inform the user.

B Grade

Excellent implementation of an Adjacency List Graph or an Adjacency Matrix Graph, plus

a good implementation of the other graph type, plus comprehensive testing of both graph

types.

An “excellent'” implementation is one that always follows the correct implementation

strategy, is written in well-organised and well-documented code and is almost entirely free

of bugs.

A Grade

Excellent implementation of an Adjacency List Graph and an Adjacency Matrix Graph, plus

comprehensive testing of both graph types.

Failing Grades

ABS/NM Grade

No submission received/no relevant work attempted.

G Grade

Code does not compile; OR

Little or no evidence of meaningful work attempted.

F Grade

Some evidence of work attempted, but few (if any) methods operate in the correct manner.

E Grade

Adjacency List and/or Adjacency Matrix Graph have been attempted, but there are too

many implementation errors for the implementation to be useful in practice; OR Adjacency

List and/or Adjacency Matrix Graph have been attempted, but the methods generally do

not follow the correct strategy.