Array Operation Exercise

This is an exercise about array operations such as array declaration, construction, initialization and high-performance copy.

Download files: ArrayOperation.java
Areas: Intro to arrays.

ArrayOperation.java

1	class ArrayOperation {
2
3	public static void main(String args[]){
4	int source[]= new int[6];
5	for (int i=0;i<6;i++){
6	source[i]=i+1;
7	}
8
9	//Array Initialization
10	int destination[]={10,9,8,7,6,5,4,3,2,1};

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Question 1

Does it make any difference if we replace line 4:
int source[]= new int[6];
with
int source[6];?

Question 2

Can we replace
int source[]= new int[6];
with
int source[];
because we will initialize the array elements in the for-loop?

Question 3

In the source array which is declared and constructed in
int source[] = new int[6];,
is source[6] a valid array element?

Question 4

In int destination[]={10,9,8,7,6,5,4,3,2,1};, the destination array is declared, constructed and initialized. If we would like to achieve the same effect using a for-loop, what would the code look like?

Question 5

What does the following line of code do?
System.arraycopy(source,0,destination,0,source.length)

Question 6

Can we to achieve the same effect as
System.arraycopy(source,0,destination,0,source.length)
using a for-loop? What would the code look like?

Question 7

Please list the values of the destination array elements after the call to the arraycopy method.