Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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- I need help with this code in Javaarrow_forwardin javaarrow_forwardSo how fast is the merge sort? Does it depend on the type of array? We saw with some of our previous sorts that it depended on the initial array. For example, an Insertion sort was much faster for a nearly sorted array. In this exercise, you are given the Sorter class, which contains a static mergeSort method that takes an int array and length as an input. You are also given the SortTester class which has three static methods for creating 3 different types of arrays. For this test, create one of the three arrays, then take a start time using System.currentTimeMillis(). Next, run the array through the mergeSort method in the Sorter class. Finally, record the end time and print out the results. Repeat this for the other two array types. Sample Output Random Array: ** Results Hidden ** Almost Sorted Array: ** Results Hidden ** Reverse Array: ** Results Hidden **arrow_forward
- Write a java class named First_Last_Recursive_Merge_Sort that implements the recursive algorithm for Merge Sort. You can use the structure below for your implementation. public class First_Last_Recursive_Merge_Sort { //This can be used to test your implementation. public static void main(String[] args) { final String[] items = {"Zeke", "Bob", "Ali", "John", "Jody", "Jamie", "Bill", "Rob", "Zeke", "Clayton"}; display(items, items.length - 1); mergeSort(items, 0, items.length - 1); display(items, items.length - 1); } private static <T extends Comparable<? super T>> void mergeSort(T[] a, int first, int last) { //<Your implementation of the recursive algorithm for Merge Sort should go here> } // end mergeSort private static <T extends Comparable<? super T>> void merge(T[] a, T[] tempArray, int first, int mid, int last) { //<Your implementation of the merge algorithm should go here> } // end merge //Just a quick method to display the whole array. public…arrow_forwardHere is the iterative implementation of binary search: For each call to binary_search below, indicate how many times the code inside the while loop will execute. animals = ["aardvark", "cat", "dog", "elephant", "panda"] 1. binary_search("elephant", animals) 2. binary_search("dog", animals) 3. binary_search("anteater", animals)arrow_forwardI need the code from start to end with no errors and the explanation for the code ObjectivesJava refresher (including file I/O)Use recursionDescriptionFor this project, you get to write a maze solver. A maze is a two dimensional array of chars. Walls are represented as '#'s and ' ' are empty squares. The maze entrance is always in the first row, second column (and will always be an empty square). There will be zero or more exits along the outside perimeter. To be considered an exit, it must be reachable from the entrance. The entrance is not an exit.Here are some example mazes:mazeA7 9# # ###### # # ## # # #### # ## ##### ## ########## RequirementsWrite a MazeSolver class in Java. This program needs to prompt the user for a maze filename and then explore the maze. Display how many exits were found and the positions (not indices) of the valid exits. Your program can display the valid exits found in any order. See the examples below for exact output requirements. Also, record…arrow_forward
- Write a java class named RecursiveMergeSort that implements the recursive algorithm for Merge Sort.You can use the structure below for your implementation.arrow_forwardPlease complete the task by yourself only in JAVA with explanation. Don't copy. Thank you. Using quicksort to sort an array of car objects by various criteria. Define a class Car as follows: class Car { public String make; public String model; public int mpg; // Miles per gallon } b) Implement a comparator called CompareCarsByDescendingMPG that can be passed as an argument to the quicksort method from the lecture notes. CompareCarsByDescendingMPG should return a value that will cause quicksort to sort an array of cars in descending order (from largest to smallest) by mpg.arrow_forward//From what I can tell, the answer provided does not answer my question. Asking again. Please read. Write a Java program that implements both Linear Search and Binary Search. The program willtake a collection of objects (generic type data) as input and print the number of comparisons neededto find a target element within that collection.You will create the following two Java classes:1. SearchCombo.java : Code for both linearSearch and binarySearch will be in this class. Youmay take help from the textbook Chapter 9, Section 9.1. However, note that the design require-ments are different from the textbook code.•Both search methods must use the Comparable<T> interface and the compareTo() method.•Your program must be able to handle different data types, i.e., use generics.•For binarySearch, if you decide to use a midpoint computation formula that is different fromthe textbook, explain that formula briefly as a comment within your code. 2. Tester.java : This class will contain…arrow_forward
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