Question:
How do you create and use a multidimensional array of type int.
Answer:
C programmers are used to dealing with multidimensional arrays as chunksof contiguous memory which can be accessed through pointer arithmetic.In Java, an array is an actual object, and a multidimensional arraymust be constructed as a an array of arrays. It is an extremely convenientarrangement because you can access the length of an array from withinthe Java language, which allows you to make each array of a differentlength if necessary, without causing undue complications. But thedownside is that you must explicitly instantiate each array, which is notas efficient as allocating one big chunk of memory. To create a 3x3x3array of integers you would do the following:
public final class Matrix { public static final void main(String[] args) { int i, j; int[][] matrix[]; matrix = new int[3][][]; for(i = 0; i < matrix.length; i++) { matrix[i] = new int[3][]; for(j = 0; j < matrix[i].length; j++) matrix[i][j] = new int[3]; } }}
