Archive for 2014

Suduko in Java

MAKING OF SUDUKOGAME

It's my semester project to make a Suduko game in Java. I worked very hard for it and at last I completed it. And I am giving you a complete description of it, it's very helpful for you.

Suduko Main View

DESCRIPTION

Making GUI Of Game

As you know that GUI of every game is very important, so first we design a GUI of game.

 import java.awt.*;  
 import java.awt.event.*;  
 import javax.swing.*;  
 import javax.swing.border.Border;  
 import javax.swing.border.EtchedBorder;  
 public class GridGuiOne  
 extends MouseAdapter implements KeyListener,ActionListener,FocusListener {  
 JButton b1,b2,b3;  
 int ce=3;  
 int gridsel=0;  
 JFrame  frame = new JFrame("Suduko");  
 JPanel  main=new JPanel(new BorderLayout()); // Main Panel  
 JPanel puzzle=new JPanel(new GridLayout(1,0));  // Holds Suduko Grid and Buttons  
 JPanel  Options=new JPanel(new GridLayout(3,0)); // Panel For JBUttons  
 JPanel Timer=new JPanel(new FlowLayout());  
 final JTextField[][] subPanels = new JTextField[9][9];   // 2D Array Of JTextFields[][]  
 JPanel[][] grid=new JPanel[3][3];  // 2D Array of Grid to hold JButtons  
     JPanel panel1= new JPanel(new GridLayout(3,3));  
 GridGuiOne()  
 {  
 
 builtOption();  
 builtGrid();  
 main.setSize(400,400);  
 Timer.add(Options);  
 main.add(Timer,BorderLayout.EAST);  
 main.add(puzzle,BorderLayout.CENTER);  
 frame.add(main);  
 frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);  
 frame.setSize(600,450);   frame.setVisible(true);}

(a). Creating Options Panel OF the Game

In options Panel I add three buttons:

Ø GENERATE

Ø CHECK

Ø EXIT

GENERATE: New Game Generate for the User

CHECK: Either Number is entered at right position or not

EXIT: Want To Quit

 public void builtOption()
       {
Options.setBorder(BorderFactory.createTitledBorder(" Options "));
b1=new JButton("GENERATE");
b2=new JButton("CHECK");                                           
b3=new JButton("EXIT");
 
b1.setPreferredSize(new Dimension(100, 50));   
b2.setPreferredSize(new Dimension(100, 50));
b3.setPreferredSize(new Dimension(100, 50));
Options.add(b1);
Options.add(b2);
Options.add(b3);
Options.setSize(400,400);
             }

Option Panel For Game

1. b) Creating SUDUKO Main View

 public void builtGrid()  
 {    
 Font s = new Font("Cooper", Font.ITALIC, 19);  
 Border bod = BorderFactory.createEtchedBorder( EtchedBorder.LOWERED, null,Color.white);  
 JPanel gridmain=new JPanel(new GridLayout(3,3));  
 for(int i=0;i<3;i++)  
 for(int j=0;j<3;j++)  
 {  
 grid[i][j]=new JPanel(new GridLayout(3,3));  
 grid[i][j].setBorder( bod );  
 gridmain.add(grid[i][j]);  
 }  
  // Adding array of Jbuttons(9x9) into the panels of(3x3)                 
 int a=0,b=0;  
 for(int i=0; i<3; i++)  
 for(int j=0; j<3; j++,b++)  
 {  
 for(int k=0;k<3;k++)  
 {  
 for(int l=0;l<3; l++,a++)  
 {  
 if(b==9 )  
 break;  
 else  
 {  
 subPanels[b][a]=new JTextField("");  
 subPanels[b][a].setHorizontalAlignment(JTextField.CENTER);  
 subPanels[b][a].setForeground(Color.black);  
 subPanels[b][a].setFont(s);  
 subPanels[b][a].setBorder(BorderFactory.createLineBorder(Color.BLACK,1));  
 subPanels[b][a].setText(null);  
 subPanels[b][a].addActionListener(this);  
 subPanels[b][a].addKeyListener(this);  
 subPanels[b][a].addMouseListener(this);  
 subPanels[b][a].addFocusListener(this);  
 subPanels[b][a].setFocusable(true);  
 grid[k][l].add(subPanels[b][a]);  
 if(a==0 || a==2 || a==4 || a==6 || a==8)  
 {  
 subPanels[b][a].setBackground(new Color(143,188,143));  
 }  
 else  
 {  
 subPanels[b][a].setBackground(new Color(255,231,186));  
 }  
 }     }  
 }  
 a=0;  
 }  
 b1.addActionListener(this);  
 b2.addActionListener(this);  
 b3.addActionListener(this);  
 puzzle.add(gridmain);  
 frame.setVisible(true);  
 }

1 2. Main Logic Of Board

I made 2D array of J Text Fields[9][9], which is placed in 3x3 of J Panel Grid. It means that in every grid there is 9 buttons, which is placed in Grid in such a way as shown in fig.

According to this table, every button have fixed position in grid. [cell][grid].

[0][0]	[1][0]	[2][0]	[0][1]	[1][1]	[2][1]	[0][2]	[1][2]	[2][2]
[3][0]	[4][0]	[5][0]	[3][1]	[4][1]	[5][1]	[3][2]	[4][2]	[5][2]
[6][0]	[7][0]	[8][0]	[6][1]	[7][1]	[8][1]	[6][2]	[7][2]	[8][2]
[0][3]	[1][3]	[2][3]	[0][4]	[1][4]	[2][4]	[0][5]	[1][5]	[2][5]
[3][3]	[4][3]	[5][3]	[3][4]	[4][4]	[5][4]	[3][5]	[4][5]	[5][5]
[6][3]	[7][3]	[8][3]	[6][4]	[7][4]	[8][4]	[6][5]	[7][5]	[8][5]
[0][6]	[1][6]	[2][6]	[0][7]	[1][7]	[2][7]	[0][8]	[1][8]	[2][8]
[3][6]	[4][6]	[5][6]	[3][7]	[4][7]	[5][7]	[3][8]	[4][8]	[5][8]
[6][6]	[7][6]	[8][6]	[6][7]	[7][7]	[8][7]	[6][8]	[7][8]	[8][8]

At that logic the J Text Fields are inserted into the panels. In whole program these positions matters a lot.

1 3. Keep Tracking Of Key Listener and Mouse Listener In J Text Field

As there are 81 JTextfields , which placed in 2D array named “subPanels[][]” in code. When user selects a specific JTextfield in game, then we have to keep record of that, so I made this function which points to the specified position during game play.

a a. Focus Listener

As there is a Listener in java, which is called FocusListener, ithas two Function.

1. FocusGained(FocusEvent ae)

2. FocusLost(FocusEvent ae)

This listener interacts or gave signal when the required field is under focus, the focusGained performed and when the focus is lost then focusLost is performed.

Here is the code:

 public void focusLost(FocusEvent arg0) {  
 for(int i=0; i<=8; i++)  
 {  
 for(int j=0; j<=8;j++)  
 {  
 {  
 if(j==0 || j==2 || j==4 || j==6 || j==8)  
 {  
 subPanels[i][j].setBackground(new Color(143,188,143));  
 //  
 }  
 else  
 {  
 subPanels[i][j].setBackground(new Color(255,     231     ,186));  
 }  
 }}  
 }  
 public void focusGained(FocusEvent arg0) {  
 int flag=0,i,j = 0;  
 // Finding at whic point the cursor is.  
 for( i=0; i<=8; i++)  
 {  
 for(j=0; j<=8;j++)  
 {  
 if(arg0.getSource()==subPanels[i][j])  
 {  
 flag++;  
 break;  
 }}  
 if(flag==1)  
 break;  
 }  
 System.out.print("Cursor" + i + " " + j);  
 printEventInfo(arg0,null,null,i,j);

a b. printEventInfor(Key Listener, Focus Listener , Mouse Listener, int a, int b)

I made this function to control the key Listener, either cursor is in main grid or out of grid. It controls the keylistener, either cursor is moving down or upward or left or right in maingrid. It controls it.

 private void printEventInfo(FocusEvent focus,MouseEvent mouseLocat,KeyEvent keyLocat,int a,int b) {  
 if (keyLocat==null)  
 {  
 ce=a;  
 gridsel=b;  
 }  
 else  
 try  
 {  
 if (keyLocat.getKeyCode()== KeyEvent.VK_DOWN)  
 {  
 if((ce>=6 && ce<=8) && gridsel>=6)  
 {  
 ce-=6;  
 gridsel-=6;  
 subPanels[ce][gridsel].requestFocus();  
 }  
 else     if((ce>=6 && ce<=8))  
 {  
 ce-=6;  
 gridsel+=3;  
 subPanels[ce][gridsel].requestFocus();  
 }  
 else  
 {  
 ce+=3;  
 subPanels[ce][gridsel].requestFocus();  
 }  
 }  
 else  
 if (keyLocat.getKeyCode() == KeyEvent.VK_UP)  
 {  
 if((ce>=0 && ce<=2) && (gridsel==0 || gridsel==1 ||gridsel==2 ))  
 {  
 ce+=6;  
 gridsel+=6;  
 subPanels[ce][gridsel].requestFocus();  
 }  
 else if((ce>=0 && ce<=2) && (gridsel>=3 && gridsel<=8) )  
 {  
 ce+=6;  
 gridsel-=3;  
 subPanels[ce][gridsel].requestFocus();  
 }  
 else  
 {  
 ce-=3;  
 subPanels[ce][gridsel].requestFocus();  
 }  
 }  
 else  if (keyLocat.getKeyCode() == KeyEvent.VK_LEFT)  
 {  
 {  
 if((ce==0 || ce==3 || ce==6) && (gridsel==0 || gridsel==3 ||gridsel==6 ))  
 {  
 ce+=2;  
 gridsel+=2;  
 subPanels[ce][gridsel].requestFocus();  
 }  
 else if((ce==0 || ce==3 || ce==6) )  
 {  
 ce+=2;  
 gridsel-=1;  
 subPanels[ce][gridsel].requestFocus();  
 }  
 else {  
 ce-=1;  
 subPanels[ce][gridsel].requestFocus();  
 }  
 }  
 }  
 else if (keyLocat.getKeyCode() == KeyEvent.VK_RIGHT)  
 {  
 {  
 if((ce==2 || ce==5 || ce==8) && (gridsel==2 || gridsel==5 ||gridsel==8 ))  
 {  
 ce-=2;  
 gridsel-=2;  
 subPanels[ce][gridsel].requestFocus();  
 }  
 else if((ce==2 || ce==5 || ce==8) )  
 {  
 ce-=2;  
 gridsel+=1;  
 subPanels[ce][gridsel].requestFocus();  
 }  
 else {  
 ce+=1;  
 subPanels[ce][gridsel].requestFocus();  
 }  
 }  
 }  
 }  
 catch (ArrayIndexOutOfBoundsException e)  
 {  
 JOptionPane.showMessageDialog(null, e.getMessage());  
 }  
 finally{  
 }  
 }

3. Game Starting Number

There are two conditions in the starting of the game.

a. Fixed Numbers at Fixed Locations

In this Condition we know the starting position of the fixed text fields. In this way we can make a different levels of the game.likewise. I t is applied if you know the whole game , then you just set the game according to your own will.

 subPanels[2][0].setText("4");  
 subPanels[2][0].setEditable(false);  
 subPanels[2][8].setText("7");  
 subPanels[2][8].setEditable(false);

b. Random Numbers at Random Locations

In the start of the game a random number is generated at the random location of Board. But these numbers are according to the rules of the game. I made a function

“logicCheck(int number, int cell, int grid, int convert)” to check the condition of the starting game.

 void randomNumberGenerate()  
      {  
           try{  
            boolean possible=true;  
            int Min1=1;  
            int Min=0;  
             int Max=8;  
          int Max1=9;  
          int randomNum=0;  
          String n;  
          int randomcell=0;  
          int randomgrid=0;  
          randomNum=(Min1 + (int)(Math.random() * ((Max1 - Min1) + 1)));  
          n=Integer.toString(randomNum);  
          randomcell=(Min + (int)(Math.random() * ((Max - Min) + 1)));  
          randomgrid=(Min + (int)(Math.random() * ((Max - Min) + 1)));  
          subPanels[randomcell][randomgrid].setText(n);  
          subPanels[randomcell][randomgrid].setEditable(false);  
          subPanels[randomcell][randomgrid].setForeground(Color.blue);  
          for(int i=0; i<10;i++)  
          for(int j=0; j<2; j++)  
          {  
           randomNum=(Min1 + (int)(Math.random() * ((Max1 - Min1) + 1)));  
           n=Integer.toString(randomNum);  
           randomcell=(Min + (int)(Math.random() * ((Max - Min) + 1)));  
           randomgrid=(Min + (int)(Math.random() * ((Max - Min) + 1)));  
           possible=logicCheck(randomNum,randomcell,randomgrid,1);  
           if(possible==true)  
           {  
           }  
           else  
           {  
                subPanels[randomcell][randomgrid].setText(n);  
                subPanels[randomcell][randomgrid].setEditable(false);       
                subPanels[randomcell][randomgrid].setForeground(Color.blue);  
          }  
          }  
           }  
          catch(ArrayIndexOutOfBoundsException ex){  
               System.out.print(ex.getMessage());  
          };}

4. Logic Check for The Game

I made a function named, “logicCheck(int number, int cell, int grid, int convert)” to check that either number which is entered correctly in board or not.

That function have a flexibility of controlling two logics. If the parameter convert have value one then it controls the starting of game, it generates different numbers. If the user press GENERATE button then it parameter convert is ON, and the random numbers are generated at random position. And when the user press check button it checks that at which position the numbers is entered wrongly. When the number is entered at wrong position and user check it then that place becomes Red. As shown in fig.

 boolean logicCheck(int num, int row, int col,int convert)  
 {  
 String d = null;  
 int x=0;  
 int a=row;  
 int b=col;  
 boolean flag=true;  
 int moreCheck=0;  
 boolean random=false;  
 int counter1 = 0;  
 try  
 {  
 // Grid Checking  
 for(int i=0; i<9; i++)  
 {  
 if(((subPanels[i][col].getText().equals("")) || i==row ))  
 {  
 //      i++;  
 }  
 else  
 {  
 d=subPanels[i][col].getText();  
 x=Integer.parseInt(d);  
 //     System.out.print("Grid " + x + " ");  
 if(convert==0)  
 {  
 moreCheck=numberCheck(i,col,num,x);  
 if(moreCheck>0)  
 {  
 flag=true;  
 break;  
 }  
 else  
 flag=false;  
 }  
 else  
 random=randomLogic(num,x);  
 if(random==false)  
 {  
 counter1++;  
 }  
 }  
 // Row Checking  
 if(!flag || convert==1)  
 {  
 // System.out.print(" \n"+flag);  
 for(int c=0;c<3 ;c++,col++)  
 {  
 for(int j=0; j<3; j++)  
 {  
 if((row==2 || row==5 || row==8))  
 {  
 if((subPanels[row][col].getText().equals("")) || (row==a && col==b))  
 {  
 row-=2;  
 }  
 else  
 {  
 d=subPanels[row][col].getText();  
 x= Integer.parseInt(d);  
 //      System.out.print("ROW " + x + " ");  
 if(convert==0)  
 {  
 moreCheck=numberCheck(row,col,num,x);  
 if(moreCheck>0)  
 {  
 flag=true;  
 break;  
 }  
 else  
 flag=false;  
 }  
 else  
 {  
 random=randomLogic(num,x);  
 if(random==false)  
 {  
 counter1++;  
 }  
 }  
 row-=2;  
 }  
 }  
 else  
 {  
 if((subPanels[row][col].getText().equals("")) || (row==a && col==b))  
 {  
 row++;  
 }  
 else  
 {  
 d=subPanels[row][col].getText();  
 x= Integer.parseInt(d);  
 if(convert==0)  
 {  
 moreCheck=numberCheck(row,col,num,x);  
 if(moreCheck>0)  
 {  
 flag=true;  
 break;  
 }  
 else  
 flag=false;  
 }  
 else  
 {  
 random=randomLogic(num,x);  
 if(random==false)  
 {  
 counter1++;  
 }  
 }  
 row++;  
 }  
 }  
 }  
 if(col==2 || col==5 || col==8)  
 col-=3;  
 }  
 }  
 //Coloumn Check  
 if(flag || convert==1)  
 {  
 for(int e=0;e<3 ;e++)  
 {  
 for(int j=0; j<3; j++)  
 {  
 if((row==6 || row==7 || row==8))  
 {  
 if((subPanels[row][col].getText().equals(""))||(row==a && col==b))  
 {  
 row-=6;  
 }  
 else  
 {  
 d=subPanels[row][col].getText();  
 x= Integer.parseInt(d);  
 if(convert==0)  
 numberCheck(row,col,num,x);  
 else  
 {  
 random=randomLogic(num,x);  
 if(random==false)  
 {  
 counter1++;  
 }  
 }  
 row-=6;  
 }  
 }  
 else  
 {  
 if((subPanels[row][col].getText().equals("")) || (row==a && col==b))  
 {  
 row+=3;  
 }  
 else  
 {  
 d=subPanels[row][col].getText();  
 x= Integer.parseInt(d);  
 if(convert==0)  
 numberCheck(row,col,num,x);  
 else  
 {  
 random=randomLogic(num,x);  
 if(random==false)  
 {  
 counter1++;  
 }  
 }  
 row+=3;  
 }  
 }  
 }  
 if(col==6 || col==7 || col==8)  
 col-=6;  
 else  
 col+=3;  
 }  
 }  
 }}  
 catch(NumberFormatException ex){};  
 if(counter1>0)  
 return random=true;  // Number present already at any location  
 else  
 return random=false; // Number not present already  
 }

a a. Random Generate Number Control

 // Random Generate Number Control  
           boolean randomLogic(int num, int x) {  
                boolean flag=true;  
                if(num==x)  
                {  
                     flag=false;  
                }  
                return flag;  
           }

b. Number Entered Checker

      // Number Check   
       int numberCheck(int c, int d,int a, int b)  
       {  
            int check=0;  
            if(a==b)  
            {  
                 subPanels[c][d].setBackground(Color.RED);  
                 check++;  
            }  
           return check;  
       }

Required Field Is Empty

5. Number Entered in Range

I also made a function which controls that either number is entered in the range. The range is “1-9” , if anyone entered any thing except these, than the board is not accepted it. It generates a pop up message that Entered number correctly.

 public void keyTyped(KeyEvent arg0) {  
 String num ;  
 int entrdNum;  
 // Checking Either Entered number is Valid  
 if (subPanels[ce][gridsel].getText().trim().length() != 0)  
 arg0.consume();  
 else  
 if ((arg0.getKeyChar() > '0' && arg0.getKeyChar() <= '9') || (arg0.getKeyChar() == KeyEvent.VK_BACK_SPACE)  
 || (arg0.getKeyChar() == KeyEvent.VK_DELETE)) {  
 }  
 else  
 {  
 JOptionPane.showMessageDialog(null, "Enter Number 1-9");  
 arg0.consume();  
 }  
 // Get Entered number in Current Cell  
 if(arg0.getKeyChar()>=49 && arg0.getKeyChar()<=57)  
 {  
 num= KeyEvent.getKeyText(arg0.getKeyChar());  
 entrdNum=Integer.parseInt(num);  
 //     System.out.print(entrdNum + " ");  
 }  
 }

Entered number is not in range

6. ActionPerformed

It detects that which button is pressed, and then work according to that button.

 public void actionPerformed(ActionEvent arg0)  
 {  
 String text=null;  
 int ef=0;  
 if(arg0.getSource()==b1)  
 {  
 for(int i=0; i<9;i++)  
 for(int j=0; j<9; j++)  
 {  
 subPanels[i][j].setText("");  
 subPanels[i][j].setEditable(true);  
 if(j==0 || j==2 || j==4 || j==6 || j==8)  
 {  
 subPanels[i][j].setBackground(new Color( 139,     71     ,93));  
 //     subPanels[b][a].setBackground(Color.PINK);  
 }  
 else  
 {  
 subPanels[i][j].setBackground(Color.WHITE);  
 }  
 }  
 randomNumberGenerate();  
 }  
 else if(arg0.getSource()==b2)  
 {  //    String text=null;  
 //   int ef=0;  
 for(int i=0; i<9; i++)  
 {  
 for(int j=0; j<9; j++)  
 {  
 if(subPanels[j][i].getText().equals(""))  
 {  
 subPanels[j][i].setBackground(Color.RED);  
 }  
 else  
 {  
 text=subPanels[j][i].getText();  
 ef = Integer.parseInt(text);  
 System.out.print(ef);  
 logicCheck(ef,j,i,0);  
 }  
 }  
 }  
 }  
 else  
 {  
 JOptionPane.showMessageDialog(null,"Are You Sure, You Want To Exit");  
 frame.setVisible(false);  
 frame.dispose();  
 }

Thank's for reading this. If you have an any query contact me.
Here it is full cod. You can download it.

Here are some tutorial which are helpful for you.

1. Logical Suduko Solver In java

2. Backtracking to solve a sudoku puzzle

3. Suduko Solver

Code : https://www.dropbox.com/s/md4uds882lx77yq/Sudoko%20Code.txt
Full Description: https://www.dropbox.com/s/7fm03z20xo3xsaj/SUDUKO.docx

Monday, July 7, 2014

Posted by Unknown

0 Comments

Tag : Java

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