Is it possible to choose a random element from one array and move it to another without the aid of ArrayLists/Collections etc (unless you can use shuffle on an array)? and making sure that element isn't selected again? I thought about setting it to null seems you cannot remove it but I'm unsure.
Basically i want myArray to get shuffled or randomized and I figured the best way would be to pull them from one in a random order and add them to a new one...
You can use Collections.shuffle(List) to shuffle an array as well:
Integer[] data = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
Collections.shuffle(Arrays.asList(data));
System.out.println(Arrays.toString(data));
will print e.g. [6, 2, 4, 5, 10, 3, 1, 8, 9, 7].
Arrays.asList will not create a new list, but a List interface wrapper for the array, so that changes to the list are propagated to the array as well.
You can use Collections.shuffle() method to shuffle a list.
- You can use a Collection like List and then use shuffle() method.
- Or if you want to stick with the Array then first you need to convert the array into List and then use shuffle() method.
Eg:
Integer[] arr = new Integer[10];
List<Integer> i = new ArrayList<Integer>(Arrays.asList());
Collections.shuffle(i);
