Can someone explain arrays?

Question

What is meant by a program which splits an int array to two arrays: one contains only even numbers, and the other only odd numbers. The two arrays are returned by the split method as array of two arrays, with the first containing only the even numbers and the second containing only the odd numbers.
I understand how to split the int array to two arrays but what is meant by return then by the split method as array of two arrays??
The program example is such below:
class Lab_05
public static void main(String[] args) {
int[] input = {10, 5, 6, 1, 2, 17, 9, 4, 33, 11, 9, 8};
// splits the array into two arrays
int[][] output = split(input);
System.out.print("original: ");
System.out.print(" even: ");
System.out.print(" odd: ");
I understand the above part but what has the below part got to do with anything. What is required of the question? I do not understand...
public static int[][] split(int[] ori) {
However, when the program is run it should look like this:
D:\it1002>java Lab_05
original: 10 5 6 1 2 17 9 4 33 11 9 8
even: 10 6 2 4 8
odd: 5 1 17 9 33 11 9
Can someone be so kind to exaplain to me.. Thanks
Priya

Answer 1

int[][] is an array of arrays (or a multi dimensional array)
public static int[][] split(int[] ori){
is the start of a method definition
it is a public method (other classes can access/ use this method if they have a reference to an Object instance of the class or a reference to the class)
static means that this method does not require an instance (nothing within the method relies on information generated by the program executing, static variables and methods define "constant" values and behaviour)
int[][] means that the result of this method is returned to the calling class in an int[][] (array of arrays of int)
split is the name of the method
(int[] ori) is the parameters that the mehod demands to perform its task (ori is the name that the method will use to reference the data passed to it probably an abbreviation of original, not that abbereviation like this is not really neccessary and only leads to code that is harder to read)