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public static int partition (ArrayList userIDs, int i, int k) {

public static int partition (ArrayList userIDs, int i, int k) {

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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LAB 7.16.1: LAB: Sorting user IDs 0/10 ACTIVITY UserIDSorting.java Load default template. Emport java.util.ArrayList; public class UserIDSorting { // TODO: Write the partitioning algorithm // // // pick the middle element as the pivot, compare the values using two index variables l and h (low and high), initialized to the left and right sides of the current elements being sorted, and determine if a swap is necessary public static int partition (ArrayList<String> userIDs, int i, int k) { } // TODO: Write the quicksort algorithm that recursively sorts the low and | // high partitions public static void quicksort (Arraylist<String> userIDs, int i, int k) { public static void main (String[] args) { Scanner scnr = new Scanner (System.in); Arraylist<String> userIDList = new ArrayList<String> (); String userID; userID = 3cnr.next (); while (!userID.equals ("-1")) { userIDList.add (userID); userID = scnr.next () ; } // Initial call to quicksort quicksort (userIDList, 0, userIDList.size () 1); for (int i = 0; i < userIDList.size (); ++i) { System.out.println (userIDList.get (i)); } }
Transcribed Image Text:LAB 7.16.1: LAB: Sorting user IDs 0/10 ACTIVITY UserIDSorting.java Load default template. Emport java.util.ArrayList; public class UserIDSorting { // TODO: Write the partitioning algorithm // // // pick the middle element as the pivot, compare the values using two index variables l and h (low and high), initialized to the left and right sides of the current elements being sorted, and determine if a swap is necessary public static int partition (ArrayList<String> userIDs, int i, int k) { } // TODO: Write the quicksort algorithm that recursively sorts the low and | // high partitions public static void quicksort (Arraylist<String> userIDs, int i, int k) { public static void main (String[] args) { Scanner scnr = new Scanner (System.in); Arraylist<String> userIDList = new ArrayList<String> (); String userID; userID = 3cnr.next (); while (!userID.equals ("-1")) { userIDList.add (userID); userID = scnr.next () ; } // Initial call to quicksort quicksort (userIDList, 0, userIDList.size () 1); for (int i = 0; i < userIDList.size (); ++i) { System.out.println (userIDList.get (i)); } }
7.16 LAB: Sorting user IDs Given a main() that reads user IDs (until -1), complete the quicksort() and partition() methods to sort the IDs in ascending order using the Quicksort algorithm, and output the sorted IDs one per line. Ex. If the input is: kaylasimms julia myron1994 kaylajones -1 the output is: julia kaylajones kaylasimms myron1994 318446.2220060.qx3zqy7 LAB 7.16.1: LAB: Sorting user IDs 0/ 10 АСTIVITY
Transcribed Image Text:7.16 LAB: Sorting user IDs Given a main() that reads user IDs (until -1), complete the quicksort() and partition() methods to sort the IDs in ascending order using the Quicksort algorithm, and output the sorted IDs one per line. Ex. If the input is: kaylasimms julia myron1994 kaylajones -1 the output is: julia kaylajones kaylasimms myron1994 318446.2220060.qx3zqy7 LAB 7.16.1: LAB: Sorting user IDs 0/ 10 АСTIVITY
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