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Answer:

Printing a 2D Array

Here is a program that creates a 2D array, then prints it out.

The way that the nested loops are written enable the program to print out the correct number of cells for each row. The expression uneven[row].length evaluates to a different integer for each row of the array.



RowCol
01234
0 1 9 4

1 0 2

2 0 1 2 3 4
uneven
class unevenExample3 { public static void main( String[] arg ) { // declare and construct a 2D array int[][] uneven = { { 1, 9, 4 }, { 0, 2}, { 0, 1, 2, 3, 4 } }; // print out the array for ( int row=0; row < uneven.length; row++ ) { System.out.print("Row " + row + ": "); for ( int col=0; col < uneven[row].length; col++ ) System.out.print( uneven[row][col] + " "); System.out.println(); } } }

QUESTION 14:

For the print method to work, must every row of uneven be non-null?