//2D array as argument to method, length

public class eg10_2DArray
{
	public static void main(String[] args)
	{
		int[][] numbers = { {1, 2, 3, 4},
							{5, 6, 7, 8},
							{9, 10, 11, 12}
							};
							
		//Display contents of array
		System.out.println("Here are the values in the array.");
		showArray(numbers);
		System.out.println("The sum of the values is " + arraySum(numbers));
	}	
	
	private static void showArray(int[][] array)
	{
		for (int row=0; row < array.length; row++)
		{
			//System.out.print(row + " ");
			for (int col=0; col < array[row].length; col++)
			{
				//System.out.print(row + "," + col+ "; ");
				System.out.print(array[row][col] + " ");
			}			
			System.out.println();
		}
	}
	
	private static int arraySum(int[][] array)
	{
		int total = 0;
		for (int row=0; row < array.length; row++)
		{
			for (int col=0; col < array[row].length; col++)
			{
				
				total = total + array[row][col];
			}			
		}
		return total;
	}
}