extracting 5 random elements from an ArrayList

i have an arraylist of 30 elements. i need to randomly extract any 5 elements from the list. i am using the Random function but i am not getting 5 different elements, the elements are getting repeated. how to get unique entries from the arraylist? please help :(

Use a random object and use nextInt for the range 0-29, use that to index into the array list, then keep track if numbers previously generated and ignore the random number if it's been seen already.

If allowed the simplest way is to use Collections.shuffle and poll the first 5 objects.

Or shuffle() the list and take the first 5 elements. (But note the shuffle is "in place" - ie it will alter the ordering of the list being shuffled - so you might want to copy the list first.)