Syntax for creating a two-dimensional array

Question

Consider:

int[][] multD = new int[5][];
multD[0] = new int[10];

Is this how you create a two-dimensional array with 5 rows and 10 columns?<

Answer 1

The most common idiom to create a two-dimensional array with 5 rows and 10 columns is:

int[][] multD = new int[5][10];

_{Alternatively, you could use the following, which is more similar to what you have, though you need to explicitly initialize each row:}

int[][] multD = new int[5][];
for (int i = 0; i < 5; i++) {
  multD[i] = new int[10];
}