public class RecursiveChangeX {

	private int [][]grid;
	private int size=0;
	
	public RecursiveChangeX(int s)
	{
		size = s;
		randomFill(size);
	}
	public static void main(String[] args) {
		RecursiveChangeX rc = new RecursiveChangeX(5);
		rc.changeTo2(2, 2);
		rc.outputGrid();
	}
public void randomFill(int s)
{
	System.out.println("Original\n");
	int randomNum =0;
	grid = new int[s][s];
	for (int r=0; r<s; r++)
	{
		for(int c=0; c<s; c++)
		{
			randomNum = (int) (Math.random()*2);
			grid[r][c] = randomNum;
			System.out.print(grid[r][c]);
		}
		System.out.println();
	}
}
public void changeTo2(int r, int c)
{
	if(r>=0 && r<size && c >=0 && c <size)
	{
		if (grid[r][c]==1) 
			{
				grid[r][c]=2;
				changeTo2(r-1, c);
				changeTo2(r+1, c);
				changeTo2(r, c-1);
				changeTo2(r, c+1);
			}
	}
	
}
public void outputGrid()
{
	System.out.println("\n Changed\n");
	for (int r=0; r<size; r++)
	{
		for(int c=0; c<size; c++)
		{
				System.out.print(grid[r][c]);
		}
		System.out.println();
	}
}
}