Is it possible to convert and Object[]array to and integer Array.
The reason I am asking is because I added integers to an ArrayList and then converted this into and Object[]array.
ArrayList<Integer> list = new ArrayList<Integer>();
Object[] arrayNumbers = list.toArray();
Which would be the best way of getting this into and int[]array? All I need to do is to sort these numbers. Can I sort all my numbers in this arraylist without converting it into an int[]array?
Kind regards
You should be doing this:
Integer[] arrayNumbers = list.toArray(new Integer[list.size()]);
If you just want to sort, simply use Collections.sort(list).
You can sort the list using Collections.sort method instead of all the conversions.
You could use the following code to sort your values
Arrays.sort(arrayNumbers);
You can sort the ArrayList using Collections.sort()
Collections.sort(list);
You already have the list of integers in the variable list.
Iterate over list and keep a track of the index and add array[index] = i:
Algorithm not Java code, I'll leave that to you:
int index;
for (index =0; index <= list.Count(); index++) {
array[index] = list[index];
}
int[]to sort a collection of integer objects; at the very least Integer implements Comparable.)