Which class declaration will you use to implement a special sorting algorithm that can sort objects of different classes?

Which class declaration will you use to implement a special sorting algorithm that can sort objects of different classes?

In Java, we can implement whatever sorting algorithm we want with any type. Using the Comparable interface and compareTo() method, we can sort using alphabetical order, String length, reverse alphabetical order, or numbers. The Comparator interface allows us to do the same but in a more flexible way.

Which interface should a class implement so that it can be sorted based on many fields criteria?

If any class implements Comparable interface in Java then collection of that object either List or Array can be sorted automatically by using Collections. sort() or Arrays. sort() method and objects will be sorted based on there natural order defined by CompareTo method.

What is the best algorithm for sorting?

Quicksort
The time complexity of Quicksort is O(n log n) in the best case, O(n log n) in the average case, and O(n^2) in the worst case. But because it has the best performance in the average case for most inputs, Quicksort is generally considered the “fastest” sorting algorithm.

Which algorithm is used in arrays sort?

As mentioned in the official JavaDoc, Arrays. sort uses dual-pivot Quicksort on primitives. It offers O(n log(n)) performance and is typically faster than traditional (one-pivot) Quicksort implementations. However, it uses a stable, adaptive, iterative implementation of mergesort algorithm for Array of Objects.

What is the best case efficiency of bubble sort?

Best case efficiency of bubble sort in improved version is O(n).

What implementation of iterator can traverse a collection in both directions?

ListIterator
Iterator is a universal iterator as it can be applied to any Collection object. We can traverse only in the forward direction using iterator. Using ListIterator which extends Iterator, can traverse in both directions.