ok I went through many help and got to the point that I can interact with the game but is there a way to interact with the grid and then code checks and gives solution if its right or wrong?

import java.util.Scanner;

public class Sudoku $\{$

public static void main$($String$[]$ args$)\{$

$//$ Create a Sudoku object

Sudoku obj $=$ new Sudoku$()$;

$//$ Initial Sudoku puzzle $(0$ represents empty cells$)$

int$[][]$ b $=\{$

$\{5,3,0,0,7,0,0,0,0\},$

$\{6,0,0,1,9,5,0,0,0\},$

$\{0,9,8,0,0,0,0,6,0\},$

$\{8,0,0,0,6,0,0,0,3\},$

$\{4,0,0,8,0,3,0,0,1\},$

$\{7,0,0,0,2,0,0,0,6\},$

$\{0,6,0,0,0,0,2,8,0\},$

$\{0,0,0,4,1,9,0,0,5\},$

$\{0,0,0,0,8,0,0,7,9\}$

$\}$;

$//$ Display the initial Sudoku grid

int size $=$ b$.$length;

System.out.println$("$The grid is:$")$;

obj.display$($b$,$ size$)$;

$//$ Allow the player to input numbers into the Sudoku grid

obj.playSudoku$($b$,$ size$)$;

$//$ Attempt to solve the Sudoku puzzle and display the solution

if $($obj$.$solveSudoku$($b$,$ size$))\{$

System.out.println$("$Sudoku solved:"$)$;

obj.display$($b$,$ size$)$;

$\}$ else $\{$

System.out.println$("$No solution exists"$)$;

$\}$

$\}$

$//$ Method to allow the player to play Sudoku

public void playSudoku$($int$[][]$ b$,$ int num$)\{$

Scanner scanner $=$ new Scanner$($System$.$in$)$;

while $($true$)\{$

System.out.println$("$Enter row and column $($separated by space$)$ to place a number $(1$ to $"+$ num $+"),$ or enter $-1$ to finish:"$)$;

int row $=$ scanner.nextInt$()$;

int col $=$ scanner.nextInt$()$;

$//$ Check for the termination condition

if $($row $==-1||$ col $==-1)\{$

break; $//$ Player wants to finish

$\}$

$//$ Validate the input for row and column

if $($row $<0||$ row $>=$ num $||$ col $<0||$ col $>=$ num$)\{$

System.out.println$("$Invalid input. Row and column must be between $0$ and $"+($num $-1)+".")$;

continue;

$\}$

$//$ Get the number to be placed

System.out.println$("$Enter a number $(1$ to $"+$ num $+")$:$")$;

int number $=$ scanner.nextInt$()$;

$//$ Validate the input number

if $($number $<1||$ number $>$ num$)\{$

System.out.println$("$Invalid number. Enter a number between $1$ and $"+$ num $+".")$;

continue;

$\}$

$//$ Check if the move is safe

if $(!$isSafe$($b$,$ row, col, number$))\{$

System.out.println$("$Invalid move. The number cannot be placed at this position."$)$;

continue;

$\}$

$//$ Place the number and display the updated grid

b$[$row$][$col$]=$ number;

System.out.println$("$Number placed successfully!"$)$;

display$($b$,$ num$)$;

$\}$

$\}$

$//$ Method to check if placing a number at a particular position is safe

public boolean isSafe$($int$[][]$ b$,$ int row, int col, int number$)\{$

$//$ Check row and column

for $($int i $=0$; i $<$ b$.$length; i$++)\{$

if $($b$[$row$][$i$]==$ number $||$ b$[$i$][$col$]==$ number$)\{$

return false;

$\}$

$\}$

$//$ Check $3$x$3$ subgrid

int sqrt $=($int$)$ Math.sqrt$($b$.$length$)$;

int boxRowStart $=$ row $-$ row $\%$ sqrt;

int boxColStart $=$ col $-$ col $\%$ sqrt;

for $($int r $=$ boxRowStart; r $<$ boxRowStart $+$ sqrt; r$++)\{$

for $($int d $=$ boxColStart; d $<$ boxColStart $+$ sqrt; d$++)\{$

if $($b$[$r$][$d$]==$ number$)\{$

return false;

$\}$

$\}$

$\}$

return true;

$\}$

$//$ Method to solve the Sudoku puzzle using backtracking

public boolean solveSudoku$($int$[][]$ b$,$ int num$)\{$

int row $=-1$;

int col $=-1$;

boolean isEmpty $=$ true;

$//$ Find the first empty cell

for $($int i $=0$; i $<$ num; i$++)\{$

for $($int j $=0$; j $<$ num; j$++)\{$

if $($b$[$i$][$j$]==0)\{$

row $=$ i;

col $=$ j;

isEmpty $=$ false;

break;

$\}$

$\}$

if $(!$isEmpty$)\{$

break;

$\}$

$\}$

$//$ If there is no empty cell, then the puzzle is solved

if $($isEmpty$)\{$

return true;

$\}$

$//$ Try placing numbers in the empty cell

for $($int number $=1$; number $<=$ num; number$++)\{$

if $($isSafe$($b$,$ row, col, number$))\{$

b$[$row$][$col$]=$ number;

$//$ Recursively solve the rest of the grid

if $($solveSudoku$($b$,$ num$))\{$

return true;

$\}$ else $\{$

b$[$row$][$col$]=0$; $//$ Backtrack

$\}$

$\}$

$\}$

return false; $//$ No solution found

$\}$

$//$ Method to display the Sudoku grid