Q:

How do you print rows and columns in a 2-d array?

I'm trying to get this array to display 4 values arranged in a 2x2 array. With what I'm doing so far, I'm getting an array out of bounds error. How can I do this display properly?
import java.util.Scanner;
import java.util.Random;

 public class GridPractice
{

public static void main(String[] args)
{
  //declarations
  Scanner in = new Scanner(System.in);
  Random  generator = new Random();
  int [][] grid;    //un-instantiated grid
  int size = 0; //number of rows and columns

  //get size of grid - no validation & instantiate
  System.out.print("Enter size of grid: ");
  size = in.nextInt();
  grid = new int[size][size];

   //fill grid with random number from 1..99
  System.out.println();
  for (int row=0; row<size; row++)
  {
     for (int col=0; col<size; col++)
     {
        grid[row][col] = generator.nextInt(100); //random numbers 0.99 - not 100

     }

   }

  System.out.printf("%2d\n", grid[size][size]); 

A:

for (int row = 0; row < size; row++) {
    for (int col = 0; col < size; col++) {
        System.out.printf("%2d ", grid[row][col]);
    }
    System.out.println();
}

