Class CollegeDemographics

Object

CollegeDemographics

public class CollegeDemographics
extends Object

Keeps track of the MajorDemographics inside of a *single* college.

Field Summary

Fields

Modifier and Type	Field and Description
private String	code The college code (NS/EG,etc).
private int	majorCount The total number of majorDemographics *currently* stored in the array.
private MajorDemographics[]	majorDemographics An array that contains the majorDemographics.
private String	name The college name (Natural Sciences/Engineering,etc).

Constructor Summary

Constructors

Constructor and Description
CollegeDemographics(String code, String name) Stores the college code into code and the college name into name

Method Summary

Modifier and Type	Method and Description
void	addGenderDemographic(String major, String gender) Increases the gender demographic count for a major.
private MajorDemographics	findMajor(String major) Finds a MajorDemographic in the majorDemographics array based on the major name.
String	getCode() Accessor for getting the unique college code.
String	getName() Accesso for the friendly college name
String	getTable() A String 'table' representation of all the majorDemographics in the college.
static void	main(String[] args) The main in this class is used for testing.

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

code

private final String code

The college code (NS/EG,etc). Once set does not change.

majorCount

private int majorCount

The total number of majorDemographics *currently* stored in the array. This allows you to add majorDemographics to the array, and keep track of how many are added.

See Also:

findMajor(String), majorDemographics

majorDemographics

private final MajorDemographics[] majorDemographics

An array that contains the majorDemographics. It is alright to make it sufficiently large (we used 100, which is overkill).

name

private final String name

The college name (Natural Sciences/Engineering,etc). Once set does not change.

Constructor Detail

CollegeDemographics

public CollegeDemographics(String code,
                           String name)

Stores the college code into code and the college name into name

Parameters:

code - the unique college code

name - the friendly name of the college

Method Detail

addGenderDemographic

public void addGenderDemographic(String major,
                                 String gender)

Increases the gender demographic count for a major. This method looks at the friendly name of the major using findMajor(String), and then adds to the demographic by calling MajorDemographics.addGenderDemographic(String) passing in the gender M/F/N

Parameters:

major - the major to assign demographic

gender - M/F/N to be used by MajorDemographic

findMajor

private MajorDemographics findMajor(String major)

Finds a MajorDemographic in the majorDemographics array based on the major name. If the MajorDemographic is not found, it builds a new one with the name of major, adds it to the array, increments the majorCount, and returns the new MajorDemographic.

Implementation Hints

• Remember, you are counting from 0, so your loop is from 0 to less than majorCount.
• If a major isn't found, you insert into the array at the majorCount location, and then increment major count
• Make sure to *TEST* this method before writing too much! An OB1 error is easy to create.

Parameters:

major - the name of the major to find

Returns:

the MajorDemographic object with the name of the major

See Also:

MajorDemographics.getName(), majorCount

getCode

public String getCode()

Accessor for getting the unique college code. Not used outside of testing.

Returns:

the college code

getName

public String getName()

Accesso for the friendly college name

Returns:

the college name

getTable

public String getTable()

A String 'table' representation of all the majorDemographics in the college. The representation will be in the following format

     CollegeName:         Major     Male       Female
                      MajorName     Male%      Female%
                     Major2Name     Male%      Female%
 

For example:

 Natural Sciences:        Major     Male       Female
                     Psychology     23.70%     76.30%
                        Zoology     17.61%     82.39%
                   Data Science     70.27%     29.73%
             Biological Science     27.71%     72.29%
 

The spacing is accomplished using String format. For the majorDemographics lines we used

     %30s%10.2f%%%10.2f%%%n
 

Which forced 2 decimal places, with a padding of 10 characters. Though it could be implemented differently.

Looping from i to i < majorCount will be helpful in building this, and while not required, we used StringBuilder to concatenate the Strings (more memory efficient). Notice the See section for more methods that will help.

Please note: We won't be grading on spaces, but you should try to make it readable for your use.

Returns:

The MajorDemographics table *as a String*

See Also:

MajorDemographics.getPercents(), MajorDemographics.getName()

main

public static void main(String[] args)

The main in this class is used for testing. We will be double checking some of your tests, to make sure you are testing your code as you write. You need the following in your tests at a minimum.

 TEST: getCode() returns NS - NS
 TEST: getName() returns Natural Sciences - Natural Sciences
 TEST: findMajor, set value - Major1
 TEST: findMajor, add value - Major2
 

Here are some example tests we wrote

     // Notice we built a CollegeDemographics object to help with tests
     // this  essentially tests the constructor also
   CollegeDemographics demo = new CollegeDemographics("NS", "Natural Sciences");
   System.out.println("TEST: getCode() returns NS - " + demo.getCode());
   
   // create an empty MajorDemographic - does need it implemented with
   // constructor and accessor
   MajorDemographics major1 = new MajorDemographics("Major1");

    // force adding a major, and incrementing count. 
   demo.majorDemographics[0] = major1;
   demo.majorCount = 1;

   MajorDemographics majorTest = demo.findMajor("Major1");
   System.out.println("TEST: findMajor, set value - " + majorTest.getName());

   // now trying with auto add
   majorTest = demo.findMajor("Major2");
   System.out.println("TEST: findMajor, add value - " + majorTest.getName());
   
 

Parameters:

args - required for completeness, not used