Write a method quicksort that takes in an ArrayList of integers and returns them in ascending order, using a quicksort style of sorting. Remember that this style relies on choosing a pivot integer and breaking the set into values less than the pivot and more than the pivot, then repeating this process on each half until only single values are left, which are then put back together. Your Answer: Feedback public ArrayList quickSort(ArrayList list) { Your answer could not be processed because it contains errors: line 1: error: invalid method declaration; return type required

import java.util.ArrayList; public class Quicksort { static int partition(int arr[], int low, int high) { int pivot = arr[high]; int i = (low - 1); for (int j = low; j < high; j++) { if (arr[j] <= pivot) { i++; int temp = arr[i]; arr[i] = arr[j]; arr[j] = temp; } } int temp = arr[i + 1]; arr[i + 1] = arr[high]; arr[high] = temp; return i + 1; } static void sort(int arr[], int low, int high) { if (low < high) { int pi = partition(arr, low, high); sort(arr, low, pi - 1); sort(arr, pi + 1, high); } } public static ArrayList<Integer> quickSort(ArrayList<Integer> list) { int[] arr = list.stream().mapToInt(Integer::intValue).toArray(); sort(arr, 0, arr.length - 1); ArrayList<Integer> result = new ArrayList<Integer>(arr.length); for (int i = 0; i < arr.length; i++) { result.add(Integer.valueOf(arr[i])); } return result; } public static void main(String[] args) { ArrayList<Integer> al = new ArrayList<Integer>(); al.add(10); al.add(12); al.add(90); al.add(16); al.add(11); al.add(84); al.add(40); al.add(21); al.add(32); al.add(54); al.add(72); al.add(94); al.add(53); ArrayList<Integer> b = quickSort(al); for(Integer a:b){ System.out.print(a+" "); } } } Output

Answered: Write a method quicksort that takes in an ArrayList of integers and returns them in ascending order, using a quicksort style of sorting. Remember that this…

Database System Concepts

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What would the code for this be?, I keep getting an error.

X488: Sorting - Quick Sort
Write a method quicksort that takes in an ArrayList of integers and returns them in ascending order, using a quicksort style of sorting. Remember that this
style relies on choosing a pivot integer and breaking the set into values less than the pivot and more than the pivot, then repeating this process on each
half until only single values are left, which are then put back together.
Your Answer:
Feedback
1 public ArrayList<Integer> quickSort(ArrayList<Integer> list) {
Your answer could not be processed because it contains
errors:
3 }
line 1: error: invalid method declaration; return type
required
Check my answer!
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