Thread: Storing a string in a 2D array

Hi!

Edit: Link to my assignment: Programming Challenges-Graphical Editor

One of the requirements of my programming assignment is that a user enters a command along with two numbers. For example, if I entered the following command:

I 5 6

The program create an image like this (it wouldn't be outputted though):

00000
00000
00000
00000
00000
00000

It creates a 5 x 6 "image". This is where my troubles begin. The program should also accepts other commands, such as:

L 3 2 F

which would produce (also not outputted):

00000
00F00
00000
00000
00000
00000

Here is my method for creating an "image" with an M * N array

for (int i = 0; i < column; i++)
{
    for (int j = 0; j < row; j++)
    {
        System.out.print("0");
    }
    System.out.println();
}

The code works, but I need to store the image in an array so it can be changed by other methods (I can't create the image manually every time). I tried doing something like this but it doesn't work:

public static String[][] createImage(int row, int column)
{        
    String[][] image = new String[row][column];
    for (int i = 0; i < column; i++)
    {
        for (int j = 0; j < row; j++)
        {
            image[j][i] = "0";
        } 
        System.out.println();
    }
    return image;
}

This method outputs as many blank lines as the columns I entered and the memory location of image.

So my question is: how would I store "0" in a 2D array so that it can be accessed and changed by other methods?
Or, am I using a 2D array incorrectly and will the image have to be created manually every time? If so, how would I output image if it is created in a separate method?

Thank you!