Here I have a code that displays and gives solution so how can I amke it so I am righting my answer but if its wrong it says incorrect and if I am right it says correct will still showing the solution?

import java.util.Scanner;

public class Sudoku $\{$

public boolean isSafe$($int$[][]$ b$,$ int r$,$ int c$,$ int num$)\{$

$//$ Check if 'num' is not present in the current row and column

for $($int i $=0$; i $<9$; i$++)\{$

if $($b$[$r$][$i$]==$ num $||$ b$[$i$][$c$]==$ num$)\{$

return false;

$\}$

$\}$

$//$ Check if 'num' is not present in the $3$x$3$ grid

int startRow $=$ r $-($r $\%3)$;

int startCol $=$ c $-($c $\%3)$;

for $($int i $=0$; i $<3$; i$++)\{$

for $($int j $=0$; j $<3$; j$++)\{$

if $($b$[$i $+$ startRow$][$j $+$ startCol$]==$ num$)\{$

return false;

$\}$

$\}$

$\}$

return true;

$\}$

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

int n $=$ b$.$length;

$//$ Find an empty location

int$[]$ empty $=$ findEmptyLocation$($b$)$;

int row $=$ empty$[0]$;

int col $=$ empty$[1]$;

$//$ If there is no empty location, the puzzle is solved

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

return true;

$\}$

$//$ Try filling the empty location with a number

for $($int num $=1$; num $<=9$; num$++)\{$

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

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

$//$ Recursively try to solve the rest of the puzzle

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

return true;

$\}$

$//$ If placing 'num' at the current location doesn't lead to a solution, backtrack

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

$\}$

$\}$

$//$ If no number can be placed at the current location, backtrack

return false;

$\}$

private int$[]$ findEmptyLocation$($int$[][]$ b$)\{$

int$[]$ location $=$ new int$[]\{-1,-1\}$;

for $($int i $=0$; i $<9$; i$++)\{$

for $($int j $=0$; j $<9$; j$++)\{$

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

location$[0]=$ i;

location$[1]=$ j;

return location;

$\}$

$\}$

$\}$

return location;

$\}$

public void display$($int$[][]$ b$)\{$

for $($int i $=0$; i $<9$; i$++)\{$

for $($int j $=0$; j $<9$; j$++)\{$

System.out.print$($b$[$i$][$j$]+"")$;

$\}$

System.out.println$()$;

$\}$

$\}$

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

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

$//$ Take user input for the initial Sudoku grid

System.out.println$("$Enter the Sudoku grid $(0$ for empty cells$)$:$")$;

int$[][]$ b $=$ new int$[9][9]$;

for $($int i $=0$; i $<9$; i$++)\{$

for $($int j $=0$; j $<9$; j$++)\{$

b$[$i$][$j$]=$ scanner.nextInt$()$;

$\}$

$\}$

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

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

obj.display$($b$)$;

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

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

obj.display$($b$)$;

$\}$ else $\{$

System.out.println$("$There is no solution available."$)$;

$\}$

scanner.close$()$;

$\}$

$\}$