Answered: Use TicketCounter to

Engineering

Computer Science

Use TicketCounter to

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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Use java Implement a phone book using a linked list structure. In this phone book , you are going to store a name,lastname,email,and phone number Implement the folowing methods by using this class public class PhoneBookSinglyLinkedList { public PhoneBookNode head; public PhoneBookNode tail; public int size; public boolean isEmpty() {//todo implement this} public int size() {//todo implement this} public void printPhoneBook() {//todo implement this} public void add(Contact contact) {//todo implement this} public PhoneBookNode findByFirstName(String firstName) {//todo implement this} public List findAllByLastName(String lastName) {//todo implement this} public void deleteByFirstName(String firstName) {//todo implement this} public void deleteAllMatchingLastName(String lastName) {//todo implement this} public List findAll() {//todo implement this}
Modify the simulate() method in the Simulator class to work with the revised interface of ParkingLot and the new peek() method in Queue. In addition, implement the getIncomingQueueSize() method of Simulator using the size() method of Queue. The getIncomingQueueSize() is going to be used in the CapacityOptimizer class (next task) to determine the size of the incoming queue after a simulation run. CODE TO MODIFY IN JAVA: public class Simulator { /** * Length of car plate numbers */ public static final int PLATE_NUM_LENGTH = 3; /** * Number of seconds in one hour */ public static final int NUM_SECONDS_IN_1H = 3600; /** * Maximum duration a car can be parked in the lot */ public static final int MAX_PARKING_DURATION = 8 * NUM_SECONDS_IN_1H; /** * Total duration of the simulation in (simulated) seconds */ public static final int SIMULATION_DURATION = 24 * NUM_SECONDS_IN_1H; /** * The probability distribution for a car leaving the lot based on the duration * that the car has been parked in…
import java.util.HashMap; import java.util.Map; public class LinearSearchMap { // Define a method that takes in a map and a target value as parameters public static boolean linearSearch(Map<String, Integer> map, int target) { // Iterate through each entry in the map for () { // Check if the value of the current entry is equal to the target if () { // If the value is equal to the target, return true } } // If no entry with the target value is found, return false } public static void main(String[] args) { // Create a HashMap of strings and integers Map<String, Integer> numbers = new HashMap<>(); // Populate the HashMap with key-value pairs numbers.put("One", 1); numbers.put("Two", 2); numbers.put("Three", 3); numbers.put("Four", 4); numbers.put("Five", 5); // Set the target value to search for…
Implement move the following way. public int[] walk(int... stepCounts) { // Implement the logic for walking the players returnnewint[0]; } public class WalkingBoardWithPlayers extends WalkingBoard{ privatePlayer[] players; privateintround; publicstaticfinalintSCORE_EACH_STEP=13; publicWalkingBoardWithPlayers(int[][] board, intplayerCount) { super(board); initPlayers(playerCount); } publicWalkingBoardWithPlayers(intsize, intplayerCount) { super(size); initPlayers(playerCount); } privatevoidinitPlayers(intplayerCount) { if(playerCount <2){ thrownewIllegalArgumentException("Player count must be at least 2"); } else { this.players=newPlayer[playerCount]; this.players[0] =newMadlyRotatingBuccaneer(); for (inti=1; i < playerCount; i++) { this.players[i] =newPlayer(); } } } package walking.game.player; import walking.game.util.Direction; public class Player{ privateintscore; protectedDirectiondirection=Direction.UP; publicPlayer() {} publicintgetScore() { return score; }…
in java please.Create a method from the implementation perspective. Create a method where it takes in a linked chain of values and adds them in order to the front. method header:public void addToFront(ANode<T> first)
Implement the Solver class. In doing so, you are allowed to define other classes to help you (as well as use “built-in” Java classes or the book’s classes). The point of the solver class is the solve method which takes a board/puzzle configuration represented as a 2D array of booleans and returns a char array containing a minimal sequence of moves that will lead to the solved board (all the cells around the edges being filled). The board configuration is passed in as a 5-by-5 boolean array of Booleans with exactly 16 true cells (filled) and 9 false cells (empty). The solve method then returns an array of characters representing a minimal sequence of moves that solves the puzzle. In other words, if the characters from the returned array are used in order as input to the move method on the Board object representing the initial configuration, the resulting board configuration represents the solved board. Furthermore, the solution must be minimal in the sense that there are no solutions…
Implement the Solver class. In doing so, you are allowed to define other classes to help you (as well as use “built-in” Java classes or the book’s classes). The point of the solver class is the solve method which takes a board/puzzle configuration represented as a 2D array of booleans and returns a char array containing a minimal sequence of moves that will lead to the solved board (all the cells around the edges being filled). The board configuration is passed in as a 5-by-5 boolean array of Booleans with exactly 16 true cells (filled) and 9 false cells (empty). The solve method then returns an array of characters representing a minimal sequence of moves that solves the puzzle. In other words, if the characters from the returned array are used in order as input to the move method on the Board object representing the initial configuration, the resulting board configuration represents the solved board. Furthermore, the solution must be minimal in the sense that there are no solutions…
What is a tree in Java? A A tree is a branching mechanism that allows multiple decisions in one statement. B A tree is a collection in which each entry has one parent but may have multiple children. C A tree is a collection in which each entry may have multiple parents but may have only one child. D A tree is a method call pattern where each call may generate multiple additional calls until the process is complete. What arguments does Java need to create a Font object? A One argument: the font's name. B Two arguments: the font's name and its style. C Three arguments: the font's name, its style, and its size. D Four arguments: the font's name, its style, its size, and its color. How do we use an iterator to get the next element in a collection? A We call the iterator's next() method. B We call the collection's iterate() method.…
In java, implement a simple email messaging system. a message has a recipient, a sender, and a message text. a mailbox can store messages. supply a number of mailboxes for different users and a user interface for the user to login, send messages to other users, read their own messages, and log out. Given the code I have so far, what needs to be added? class Message { private String sender; private String recipient; private String messageText; public Message(String sender, String recipient) { this.sender = sender; this.recipient = recipient; this.messageText = " "; } public void append(String text) { this.messageText += text; } public String toString() { return "From: " + sender + " To: " + recipient + "\n" + this.messageText; } } class Mailbox { private ArrayList<Message> email; public Mailbox() { this.email = new ArrayList<Message>(); } public Message…
Add the three classic operations of Queues in the MagazineList.java to make it become a queue. Add testing code in MagazineRack.java to test your code. (You do not need to modify Magazine.java) Magazine.java : public class Magazine {private String title;//-----------------------------------------------------------------// Sets up the new magazine with its title.//-----------------------------------------------------------------public Magazine(String newTitle){ title = newTitle;}//-----------------------------------------------------------------// Returns this magazine as a string.//-----------------------------------------------------------------public String toString(){return title;}} MagazineList.java : attached the image below MagazineRack.java: public class MagazineRack{//----------------------------------------------------------------// Creates a MagazineList object, adds several magazines to the// list, then prints…
in Java. Bank simulation only
Write a program in Python to show how a queue works using empty, size, front, back, push item onto queue, and push item off queue.