Given the fragment:
int [] array = {1, 2, 3, 4, 5};
System.arraycopy (array, 2, array, 1, 2);
System.out.print (array [1]);
System.out.print (array[4]);
What is the result?
A.
14
B.
15
C.
24
D.
25
E.
34
F.
35
Explanation:
The two elements 3 and 4 (starting from position with index 2) are copied into
position index 1 and 2 in the same array.
After the arraycopy command the array looks like:
{1, 3, 4, 4, 5};
Then element with index 1 is printed: 3
Then element with index 4 is printed: 5
Note: The System class has an arraycopy method that you can use to efficiently copy data from
one array into another:
public static void arraycopy(Object src, int srcPos,
Object dest, int destPos, int length)
The two Object arguments specify the array to copy fromand the array to copy to. The three int
arguments specify the starting position in the source array, the starting position in the destination
array, and the number of array elements to copy.
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