Collections.sort() in Java with Examples. java.util.Collections.sort() method is present in java.util.Collections class. It is used to sort the elements present in the specified list of Collection in ascending order.Which is better Arrays.sort or collections.sort?
Arrays.sort() vs Collections.sort() Arrays.sort works for arrays which can be of primitive data type also. Collections.sort() works for objects Collections like ArrayList, LinkedList, etc. We can use Collections.sort() to sort an array after creating a ArrayList of given array items.What happens if list is not sorted in ascending order?
The list must be sorted into ascending order according to the specified comparator (as by the sort(List, Comparator) method), prior to making this call. If it is not sorted, the results are undefined. If the list contains multiple elements equal to the specified object, there is no guarantee which one will be found.