Sudoku Checker Program - Cannot Find Symbol

Jul 9, 2014

I can't get the code to compile for the driver every time i get an error message saying

SudokuCheckerTest.java:28: error: cannot find symbol
foo.displayGrid(grid);
^
symbol: variable grid
location: class SudokuCheckerTest
SudokuCheckerTest.java:29: error: cannot find symbol
foo.getGrid(grid);

[Code] .....

4 errors

Java Code :

import java.util.Scanner;
public class SudokuChecker{
public SudokuChecker(){
// displays intro code and initializes the array grid as well as using method calls.
Scanner in = new Scanner(System.in);
int [][] grid = new int [4][4];
displayGrid(grid);

[Code] ....

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[Code] ....

Where did I did wrong cus I keep getting these errors: What do I need to do to fix the errors?

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[Code] ....

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[Code] ....

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[Code] .....

Attached image(s)

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