Assignment 2

Choosing the Right Computer Science Graduate School

There are many online resources that provide valuable information about graduate programs in Computer Science, and how to choose programs that best fit an individual student's interests and needs. One particularly interesting website allows you to customize the ranking of graduate programs based on your own weighting of various criteria used to judge the quality of these programs and was created by Geoff Davis while he was on the faculty at Dartmouth College.

In this problem, you will implement a small version of a program that produces a customized ranking of Computer Science graduate programs.

Task 1: Sorting an Array of integers

Task 2: School.java

In this file define a class, School, to store information about a single graduate school program. A School instance has the following properties:

• name
• rating of its academic programs
• rating of its effectiveness in educating research scholars
• rating of the impact of its faculty publications

• overall rating of the school. The overall rating (an integer) for a school is computed based on the ratings of the three individual rankings of the school (weighted sum of them, see below).
• rank value -an other integer- will hold the value on which the sorting of the schools is based. (Sorting the schools will be discussed in Task 3, part 6 of this assignment.)

Your task: (Please add the code in the following order!)

1. Set up the instance variables, according to the discussion above.
2. Provide a constructor to create instances of School objects, given values for the four properties.
3. Provide means for printing an instance of type School.
4. Provide getters (accessors) for all the private instance variables in the School class.
5. Provide a method, computeRating(), that computes the overall rating of a School instance and sets the appropriate instance variable (overall rating). Different users may value each of the ranking factors (academic programs, research and publications) differently. The method definition should reflect that. In particular, the method should take three weights, with values in the integer range [1 .. 5], to be associated with each of the three evaluation factors. Then, it should compute the overal rating as the weighted sum, Σ(weight * factor), of the three evaluation factors, and set the overall rating accordingly.
6. As always, add a main() method to test your work.

Task 3: GradSchools.java

In this file define a new class, GradSchools, that stores information about a collection of School objects. Use an array as the container for the School objects. Once the user enters her weights for Academics, Research and Publications, the program computes the overall rating for all schools in the collection, as the weighted sum of the three rating factors. Then, it sorts the schools according to each one of the ranking factors, and prints the results. (See the Sample run provided at the end of this document.)

Your task: (Please add the code in the following order!)

1. Set up the appropriate instance variables in the GradSchools class.
2. Provide a constructor for the GradSchools class.
3. Provide means for printing an instance of type GradSchools. (Hint: This method should implicitely use the printing method in the School class!)
4. Define a method, addSchool(), that adds a School instance to the collection.
5. Define a method, computeRatings() that computes the overall rating for all schools in the collection, based on the three weights that are passed as parameters to it.
6. Provide a method rankSchools() to rank-order all the schools in the collection, based on its input factor. The input to the method should be a String, specifing one of the three ranking factors (academics, research, publications), or the overall rating, to be used as the criterion for ranking. For example, suppose that a GradSchools object has been created named myGradSchools. The method call
   > myGradSchools.rankSchools("Academics")
   might result in a printout like the following:

   Ranking of schools from highest to lowest using "Academics" as the factor:
   MIT
   CMU
   Stanford
   Univ. of Illinois
   UC Berkeley
   Univ. of Washington
   Cornell
   Princeton

   The method call
   > myGradSchools.rankSchools("Overall")
   might result in a printout like the following:

   Ranking of schools from highest to lowest using "Overall" as the factor:
   Stanford
   CMU
   MIT
   Univ. of Illinois
   UC Berkeley
   Cornell
   Princeton
   Univ. of Washington

   Notice that the names of the schools are printed in order from highest to lowest rank.

   The rankSchools() method stores each school's rating value for the desired factor into the school's rank value instance variable. Then, the sorting process uses the rank value to sort the School objects in the array. At the end, the method prints the names of the ranked schools. It is advisable that rankSchools() method calls a sorting helper method to sort the array of schools based on their rank value. Use the sorting method you worked with in Task 1 as your starting point in writing the method that sorts the array of School objects. You only need to make few modifications to the method that sorts an array of integers, in order to make it sort an array of School objects! (Feel free to make changes to the arguments of the method, or make it an instance method, as opposed to a class one, as it fits your needs.)

7. Finally, add a main() method with code to test the methods defined in the GradSchools class. Add test cases to thoroughly test your code, including calls to the method rankSchools().

What to turn in

submit cs230 GradSchools *.*

Note: Be sure to include top-of-the-file comments in each of your code files.

But I do not care about Grad School Ratings!

Samle run

Assign2 tm$ java GradSchools
Please provide 3 weights (1..5) for Academics, Research and Publications

Assign2 tm$ java GradSchools 3 5 4
There are 4 schools in the database:

 Name: MIT
 Rating of Academics: 10
 Rating of Research: 10
 Rating of Publications: 7
 Overall rating: 108
 Current rank value: 0

 Name: Stanford
 Rating of Academics: 8
 Rating of Research: 10
 Rating of Publications: 9
 Overall rating: 110
 Current rank value: 0

 Name: CMU
 Rating of Academics: 7
 Rating of Research: 8
 Rating of Publications: 6
 Overall rating: 85
 Current rank value: 0

 Name: UC Berkeley
 Rating of Academics: 9
 Rating of Research: 9
 Rating of Publications: 9
 Overall rating: 108
 Current rank value: 0

Ranking of schools from highest to lowest using Acedemics
MIT
UC Berkeley
Stanford
CMU

Ranking of schools from highest to lowest using Effectiveness of Research
Stanford
MIT
UC Berkeley
CMU

Ranking of schools from highest to lowest using Pubs
UC Berkeley
Stanford
MIT
CMU

Ranking of schools from highest to lowest using Overall
Stanford
MIT
UC Berkeley
CMU