twoD[i][j] = k;
k++;
}
for(i=0; i<4; i++) {
for(j=0; j<i+1; j++)
System.out.print(twoD[i][j] + " ");
System.out.println();
}
}
}
This program generates the following output:
0
12
345
6789
The array created by this program looks like this:
The use of uneven (or, irregular) multidimensional arrays may not be appropriate for many
applications, because it runs contrary to what people expect to find when a multidimensional
array is encountered. However, irregular arrays can be used effectively in some situations. For
example, if you need a very large two-dimensional array that is sparsely populated (that is,
one in which not all of the elements will be used), then an irregular array might be a perfect
solution.
It is possible to initialize multidimensional arrays. To do so, simply enclose each dimension's
initializer within its own set of curly braces. The following program creates a matrix where
each element contains the product of the row and column indexes. Also notice that you can
use expressions as well as literal values inside of array initializers.
// Initialize a two-dimensional array.
class Matrix {
public static void main(String args[]) {
double m[][] = {
{ 0*0, 1*0, 2*0, 3*0 },
{ 0*1, 1*1, 2*1, 3*1 },
{ 0*2, 1*2, 2*2, 3*2 },
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