Simple sudoku implementation, JAVA Programming

Assignment Help:

SudCell and Simple Sudoku Implementation

We describe, fully, the SudCell class that will represent each of the 81 cells or boxes in a Sudoku puzzle.  Then we will see a simple version of the Sudoku class.  Make sure you have read and understood the general introduction to the SudCell and Sudoku class in the main assignment page.  I have laid out every detail of the class members and methods for you, so although this is a long document, it should be actually easier than assignments which are shorter but less specific.

SudCell Class Specification

 Create a class called SudCell that has the following private members:

  • boolean digits[] - an array of nine booleans, each representing the digits 1 through 9.  If digits[0] is true, that means this cell might contain a 1.  If digits[1] is true, it might contain a 2, and so on.  This is private.
  • boolean completed - a private boolean telling our higher level classes whether or not we are done exploiting this cell.  All SudCell objects start with completed = false, even those for which we are given the final value, because for those "givens" we still have not utilized that fact yet.  Once we do, we turn this cell off (set completed to true).

The following public static members will allow us to turn this into a 4x4 or  16x16 Sudoku with a few keystrokes -- we'll use these constants throughout the code and never have a 1 through 9 literal in any part of our program.

  • static final int MIN_VAL = 1
  • static final int MAX_VAL = 9
  • static final int NUM_VALS = 9
  • static final int SQRT_NUM_VALS = 3
  • static final int NOT_FINAL_YET = -1    (used to signal whether or not we have narrowed down the boolean digits[] array to one value -- different from completed if you think about it).

You should supply all of the following public methods (at a minimum):

Basic Stuff:

  • Constructor - just one, default, that allocates digits[], sets the digits to all true and completed to false.
  • ToString() - a method that will return a String that is a " - " if the cell has more than one true, or a digit (surrounded by spaces) if the cell is narrowed down to just one (true) value. Since the Sudoku class will  need to build a 9x9 matrix on the display, this should not contain any newline ('\n') character -- just three chars, the two spaces and the middle digit or '-'.  This is used for end-user output.
  • ToStringReveal() - This returns a string that contains all the values that this cell might still be.  In other words, if you have not ruled out 3, 5 or 9, it would return the string " 359 " (with spaces at both ends).  If you have narrowed it down to 9, it will return " 9 ".  If you have not narrowed it down at all, it would return " 123456789 ".   (I could have combined ToString() and ToStringReveal() into one method that took a boolean parameter, but I chose to make these two different methods.)  In a console based application, printing all the cells using ToStringReveal() might result in a raggedy matrix, since each cell will have a different length, but that's not too critical.  You could make the return values of ToStringReveal() all the same length by padding with spaces, but from two weeks of debugging I have found that it is better to let the 9x9 array that displays these "revealed" strings be jagged, because it helps to more easily determine whether two successive outputs of an in-progress Sudoku are the same or different.

 


Related Discussions:- Simple sudoku implementation

Web-based application, Web-based Application: CIA - OMP Type     ...

Web-based Application: CIA - OMP Type                                         Web-based Application Role                                          Weblogic Administrato

Page replacement algorithms code in nachos, what is the code for page repla...

what is the code for page replacement algorithms in nachos os

What is event handler works, What is Event Handler works? An event hand...

What is Event Handler works? An event handler is a command which is used to call a function when an event happens, such as the user clicking a button or mouse.

How to evaluate two words similarity, I need to get how to start the java p...

I need to get how to start the java program to evaluate the simillarity.

Insert admob code into android application, Need to Insert Admob Code Into ...

Need to Insert Admob Code Into Android Application Project Description: We are seeking Android developer to add Admob code in to our application. It should be very simple

Game of life, Conway's Game of Life is a "cellular automaton" that is playe...

Conway's Game of Life is a "cellular automaton" that is played on a 2D grid (array) of cells. At the start of the game, an initial configuration is set up in which a number of cell

Java application - gui and backend projects, JNLP/ Java Application - GUI a...

JNLP/ Java Application - GUI and Backend Projects Project Description: I am looking for assist in making changes to a complex java application. System launches from web pa

Method to define the packages in java programme, Q. Write the method to def...

Q. Write the method to define the packages in java programme. Explain. Ans. Package: When we work on a project we have to break our programme in several classes. To organize

Gen keys, Write a Java class that generates a random integer (between 1 and...

Write a Java class that generates a random integer (between 1 and 250). Call the class GenKeys. GenKeys should have a least one method that returns the integer random number. Gen K

List down the names of two array techniques available java, List down the n...

List down the names of two array techniques available in JavaScript. The two techniques thata rae available in java script is: 1. sort( ) [sorts elements within alphabetical

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd