Sudoku.java

import java.io.*;
import java.util.*;

public class Sudoku{     // REMEMBER: // Represent blanks as 0's
	
 //  int model[][] ;
   
   public static void main(String[] args) throws IOException {
	  // int model[][] ;
	   Scanner in = new Scanner(new InputStreamReader(System.in)); //FileInputStream
	   while (true){
	   System.out.println("Would you like to: (Enter 1 or 2) \n1. Generate a Sudoku puzzle \n2. Solve a Sudoku Puzzle \n3. Exit");
	   
	   //If selects 1 ---> AFter generate sudoku puzzle, ask if you want to solve it.
	   // If selects 2 --> Ask if wanna generate random puzzle first or input their own puzzle
	   
	   int x = in.nextInt();
	   
	   if(x==3){break;}
	  // Sudoku s0 = new Sudoku();
	   SudokuGen s1 = new SudokuGen();
	   SudokuBacktracking s2 = new SudokuBacktracking();
	   SimulatedAnnealingSolver s3 = new SimulatedAnnealingSolver();
	   
	   if(x==1){ // Generate
		   System.out.println("\nSelect difficulty level? \n1. Easy \n2. Medium \n3. Hard");
		   int y = in.nextInt();
		   if(y==1){s1.number = 3;}
		   if(y==2){s1.number = 5;}
		   if(y==3){s1.number = 7;}
		   s1.init();
		   s1.run();
		  // System.out.println("Number of times grid-blank-assignment was done: " + s1.ctr);
		   
		   System.out.println("\nWould you like to solve this puzzle too? (Enter 1, 2 or 3) \n1.Yes, using Backtracking \n2.Yes, using Simulated Annealing \n3. No");
		   int x1 = in.nextInt();
		   if(x1==1){
			   s2.init(s1.model); s2.run(); System.out.println("\nSolution found. ");s2.updateView(); System.out.println("\nOriginal puzzle was:");
			   for( int row = 0; row < 9; row++ ){
			    	  System.out.println();
			    	  if(row==0){System.out.println("\n -----------------------");}
			         for( int col = 0; col < 9; col++ )
			            if( s1.model[row][col] != 0 ){
			            	if(col ==0) {System.out.print("| ");}
			            	System.out.print(s1.model[row][col] + " ");
			            	if(col==2 | col == 5 | col ==8){System.out.print("| ");}
			            }
			            else{
			            	if(col ==0) {System.out.print("| ");}
			            	System.out.print("-" + " ");
			            	if(col==2 | col == 5 | col ==8){System.out.print("| ");}
			            }
			         if(row==2 | row == 5 | row ==8){System.out.print("\n -----------------------");}
			      }
			      System.out.println();
		   }
		   if(x1==2){
			   int[][]temp = new int[9][9];
			   for (int i=0; i<9; i++){
				   for(int j=0; j<9; j++){
					   temp[i][j] = s1.model[i][j];
				   }
			   }
			   s3.SimulatedAnnealingSolve(temp);System.out.println("\nOriginal puzzle was:");
			   for( int row = 0; row < 9; row++ ){
			    	  System.out.println();
			    	  if(row==0){System.out.println("\n -----------------------");}
			         for( int col = 0; col < 9; col++ )
			            if( s1.model[row][col] != 0 ){
			            	if(col ==0) {System.out.print("| ");}
			            	System.out.print(s1.model[row][col] + " ");
			            	if(col==2 | col == 5 | col ==8){System.out.print("| ");}
			            }
			            else{
			            	if(col ==0) {System.out.print("| ");}
			            	System.out.print("-" + " ");
			            	if(col==2 | col == 5 | col ==8){System.out.print("| ");}
			            }
			         if(row==2 | row == 5 | row ==8){System.out.print("\n -----------------------");}
			      }
			      System.out.println();
		   }
		   else {
			   System.out.println("\nDone.");
		   }

	   }
	   
	   else { //ie. x==2, that is, Solve
		   System.out.println("\nWould you like to: (Enter 1 or 2) \n1. Input a Sudoku puzzle to solve \n2. Generate a Sudoku puzzle to solve");
		   int y = in.nextInt();
		   
		   if(y==1){ //take sudoku input to solve
			   int[][] temp = new int[9][9];
			   System.out.println("\nEnter rows 1 to 9. Represent blanks as 0s.");
			   String a = new String();
			   for(int i=0; i<9; i++){
				   System.out.println("Enter row "+ (i+1) + ": ");
				   a = in.next();
				   for(int j=0; j<9; j++){
					   temp[i][j] = Character.getNumericValue(a.charAt(j)); //TEST THIS INPUT METHOD!!!! ~~~~~~~~~~~~~~~~~~~~~~
				   }
			   }
			   
			   s2.init(temp); s2.run();System.out.println("\nSolution found. ");s2.updateView();System.out.println("\nOriginal puzzle was:");
			   for( int row = 0; row < 9; row++ ){
			    	  System.out.println();
			    	  if(row==0){System.out.println("\n -----------------------");}
			         for( int col = 0; col < 9; col++ )
			            if( temp[row][col] != 0 ){
			            	if(col ==0) {System.out.print("| ");}
			            	System.out.print(temp[row][col] + " ");
			            	if(col==2 | col == 5 | col ==8){System.out.print("| ");}
			            }
			            else{
			            	if(col ==0) {System.out.print("| ");}
			            	System.out.print("-" + " ");
			            	if(col==2 | col == 5 | col ==8){System.out.print("| ");}
			            }
			         if(row==2 | row == 5 | row ==8){System.out.print("\n -----------------------");}
			      }
			      System.out.println();
		   }
		   
		   else { // that is, y==2, ie. Generate puzzle to solve
			   
			   s1.init();
			   s1.run();
			   
			   System.out.println("\nWould you like to solve this puzzle using: (Enter 1 or 2) \n1. Backtracking \n2. Simulated Annealing");
			   int x1 = in.nextInt();
			   if(x1==1){
				   s2.init(s1.model); s2.run();
			   }
			   else{
				   s3.SimulatedAnnealingSolve(s1.model);
			   }
			   
			   			   
		   }
		   

	   }
	   	   
	   
   }
   }
   
}