Null on 2D Array

[Trooper88]

I know this is probably a very simple solution, but im very new to Java... im just switching over from C

My problem is i get a "Null" exception on my gameOn 2D array in the display method... can anyone help?

The display is a method that supposed to print a 6 by 7 grid of X's with numbers 1 through 7 at the bottom

Thanks

public class connect4 
{
    // instance variables
    private String[][] gameOn;

    /**
     * Constructor for objects of class connect4
     */
    public connect4()
    {
        // initialise instance variables
        String[][] gameOn = new String[6][7];
    
    }


    public void display()
    {

        for( int x = 0; x <= 5; x++)
        {
              for( int y = 0; y <= 6; y++)
              {
                gameOn[x][y] = "X";
              }
        }
        
        for(int x = 0; x <= 5; x++)
        {
               int y = 0;
              System.out.println("  " + gameOn[x][y] + "  "  + gameOn[x][y+1] +"  " +  gameOn[x][y+2] +"  " +  gameOn[x][y+3] +"  " +  gameOn[x][y+4] +"  " +  gameOn[x][y+5] +"  " +  gameOn[x][y + 6]); 
        }
    
        System.out.println("  " + 1 + "  "  + 2 +"  " +  3 +"  " +  4 +"  " +  5 +"  " +  6 +"  " +  7); 
    
    }
}

[eRaaaa]

   public connect4()
    {
        // initialise instance variables
        String[][] gameOn = new String[6][7];
    
    }

remove the String[][] :D

[Trooper88]

Thank you so much, you have no idea how long ive stared at this code haha