//Array2D.java


public class Array2D {
    public static void main(String[] args) {

	int rows = Integer.parseInt(args[0]);
	int cols = Integer.parseInt(args[1]);

	//declare and construct a 2D array.    
	int[][] arr2d = new int[rows][cols];   //sizes could be constants

	fill_with_junk(arr2d);

	display(arr2d);

    }


    public static void fill_with_junk(int[][] A) {

	//Fill with random numbers

	for (int i=0; i<A.length; i++)  //.length of 2D array is #rows
	    for (int j=0; j<A[i].length; j++)//.length of a row is #cols it has
		A[i][j] = (int)(Math.random() * 100);
    }


    public static void display(int[][] A) {

	for (int i=0; i<A.length; i++) {
	    for (int j=0; j<A[i].length; j++)
		System.out.print(A[i][j] + " ");
	    System.out.println();
	}
    }


}


/*


*/