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

Boolean array, If I have a boolean array that contains 30 elements (boolean...

If I have a boolean array that contains 30 elements (boolean[] fish), how do I go about isolating every 10 elements to use for something specific? Say there are 30 types of fish s

Advanced java info1414, This is a working program that shows election resul...

This is a working program that shows election results from the infamous 2000 presidential election involving a lot of Floridians and 'hanging chads'. The program as written reads a

What is arithmetic promotion assignment and casting, What is Arithmetic pro...

What is Arithmetic promotion assignment and casting? In an assignment statement, i.e. if there's an equals sign, Java compares the type of the left hand side to the at last typ

Synchronization and its importance, What do you mean by synchronization an...

What do you mean by synchronization and its importance?

Complete back end and front end development, Complete Back end and Front En...

Complete Back end and Front End Development Project Description: This work is a part of ongoing project. The need is to prepare and integrate the web part of this project.

Need minecraft bukkit plugin programmer, Need Minecraft Bukkit Plugin Progr...

Need Minecraft Bukkit Plugin Programmer I want to make my own server for Minecraft. I am in need of a experts to make custom bukkit plugins for my server. But basically I will w

Arraya, what is arrays and how do they operate

what is arrays and how do they operate

Explain identifiers in java, Explain Identifiers in Java ? Identifiers ...

Explain Identifiers in Java ? Identifiers are the names of variables, classes, methods, packages and interfaces. Unlike literals they are not the things themselves, only ways o

Admin panel to upload my html and psd templates, Admin panel to upload my h...

Admin panel to upload my html, php, psd templates Project Description: -Upload my psd file and convert -Login panel -Client login panel -Encryption code -Send dem

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