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.

Row
Col
 
0
1
2
3
4
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();
    }

  }
}