Write import statements used in library.java
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Assignment1: Analyse the case study given in chapter 3 Linked list
Answer the following questions from Library.java
1. Write the different class names with class keyword
2. Write the different methods using public and private keywords
3. Write the class names with extends keyword linkedlist
4. Write import statements used in library.java
5. Write the main method
chapter 3 Linked list :
https://drive.google.com/file/d/1NRN_3Fx3smkjwv1jgG8hzaiGfnNfeeDb/view?usp=sharing
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- 2. Linked ListsGiven the starter code consisting of ListOfNodes.java and Node.java, complete theimplementation of all the methods in ListOfNodes.java without changing the code in Node.javaor main(). You should start by commenting all the lines in main and gradually implement themethods then run the code after each method comparing the real output to the expected out listedhere. The following are some rules and guidelines you must follow:a. Read all the methods and decide if some of them will call on othersb. Reuse methods whenever possiblec. You are encouraged to write private helper methodsd. You cannot use the LinkedList class provided by the Java Framework The expected output is:[], 0[l], 1[el], 2[Hel], 3[Helo], 4[Hello], 5[ABCDE], 5ABCDE[ABCDE], 5CMPS 210 Quiz 1 Spring 2020/2021[ABCCDE], 6[ACXCDC], 6[AXCDC], 51C[AXCD], 4D[AXC], 3C[AX], 2X[A], 1A[], 0[abcde], 5[badce], 5[$badce], 6[b$daec], 6Write a Java program that prompts a user for vehicle data and stores it in a linked list, and then sorts the list in ascending order based on miles-per-gallon and writes the sorted data to a text file, you can follow these steps: Create a class named Vehicle with private fields: make (String), model (String), and milesPerGallon (double). Include getters and setters for these fields. Implement the Comparable interface for Vehicle class and override the compareTo() method to compare vehicles based on their milesPerGallon. Create a main class (for example, VehicleDriver.java) to handle user input and perform the necessary operations. Inside the main method, create a BufferedReader object for user input. Prompt the user to enter the number of vehicle data they want to enter and store it in a variable (for example, nVehicles). Use a loop to iterate nVehicles times and prompt the user to enter make, model, and miles per gallon for each vehicle. Create Vehicle objects using the input data…11.8 At what point does the Java environment complain about your passinga non-Comparable value to an OrderedVector?11.9 Write the compareTo method for the String class.11.10 Write the compareTo method for a class that is to be ordered by a field,key, which is a double. Be careful: The result of compareTo must be an int.
- Review: 4. What is the output of below javacode? ___________import java.util.*;class Array{public static void main(String args[]){int array[] = new int [5];for (int i = 5; i > 0; i--)array[5-i] = i;Arrays.fill(array, 1, 4, 8);for (int i = 0; i < 5 ; i++)System.out.print(array[i]);}} 5. Complete the sentence: The type parameter section is surrounded by ________.6. A method that introduces its own type parameter is a generic method. True/False.7. Complete the sentence: Generic type parameters can be restricted to a group of types that implement a given interface. You can do that byusing the keyword__________.8. Type parameters can represent ( stand for) reference types as well as primitive types. True/false.Create a class MapTester (either in your current project or in a new project). In it, use a HashMap to implement a contacts list similar to the one in the example above. (Remember that you must import java.util.HashMap.) In this class, implement two methods: public void enterNumber(String name, String number) and public String lookupNumber(String name) The methods should use the put and get methods of the HashMap class to implement their functionality.Provide a different implementation of ChoiceQuestion. Instead of storing the choices in an array list, the addChoice method should add the choice to the question text. For this purpose, an addLine method has been added to the Question class. Use the following files: Question.java /** A question with a text and an answer.*/public class Question{ private String text; private String answer; /** Constructs a question with empty text and empty answer. */ public Question() { text = ""; answer = ""; } /** Sets the answer for this question. @param correctResponse the answer */ public void setAnswer(String correctResponse) { answer = correctResponse; } /** Checks a given response for correctness. @param response the response to check @return true if the response was correct, false otherwise */ public boolean checkAnswer(String response) { return response.equals(answer); } /** Add a line of text to…
- help me run this code import java.util.*;class Main{static int max_kids;HashMap<String,ArrayList<Section> > sports ;public Main(int max){max_kids = max;sports = new HashMap<>();}static class Person{String name;int age;public Person(String name , int age ){this.name = name;this.age = age;}}static class Trainer extends Person{int id;public Trainer(int id , String name , int age ){super(name , age );this.id = id;}}static class Kid extends Person{int id;public Kid(int id , String name , int age ){super(name , age );this.id = id;}}static class Section{int section;String course ;Trainer instructor;int size ;HashMap<Integer ,Trainer > Trainers;public Section(int section , String course , Trainer instructor){this.section = section;this.course = course;instructor = this.instructor;Kids = new HashMap<>();this.size = 0; }public void addKid(int id ,Kid s1){if(Kids.containsKey(id) || size == max_Kids){System.out.println("Adding student to Section is not…Hi, I am not sure what's wrong with my code. Can you please check why it is giving me an error? In the starter file is a partial implementation of a doubly-linked list in DoublyLinkedList.java. We will write three new methods in this class to provide additional functionality. Write a method addFirst that adds a new element at the beginning of a DoublyLinkedList. Write a method addLast that adds a new element at the end of a DoublyLinkedList. Write a method removeFirst that removes and returns the first element of a DoublyLinkedList. Try to keep your implementations as simple as possible. For example, recall this definition of addFirst in the (Singly) LinkedList class: public void addFirst(E value) { head = new Node(value, head); } In the DoublyLinkedList class, you will need to keep the three instance variables head, tail, and count updated in all methods. Note that addFirst and addLast will be symmetric to each other, as will removeFirst and removeLast (provided in the…Write a class called Pokemon that has a name (e.g. “Pikachu”) and a number (e.g. 25). Implement a constructor that takes both values as parameters. Implement accessors for both values. Implement a toString() that returns a string in the format “Name(number)”, e.g. “Pikachu(25)”. Implement an equals(Object) method (two Pokémon are considered equal if they have the same number). Implement a hashCode() method that returns the number.(remember the equals and hashCode contract).
- Computer Science Write a program in the Java language that includes: 1. A class for books, taking into account the encapsulation and getter, setter. 2. Entering books by the user using Scanner 3. LinkedList class for: (Adding a new book - Inserting a book- Searching for a book using the ISBN Number - Viewing all books,delete book). 4. Serial number increases automatically with each book that is entered. 5. Printing the names of books is as follows: Serial - ISBN - Name - PubYear - Price - Notes. 6-Design a main menu that includes: • Add Book • Insert Book • Delete Book • Search . Display . ExitIn java, Implement a method that removes all duplicates. Keep the first instance of the element but remove all subsequent duplicate elements.public void removeDuplicates() see the picture for the right output. Given files: Demo6.java public class Demo6 { public static void main(String[] args) { MyLinkedList<String> list = new MyLinkedList<>(); TestBench.addToList(list); TestBench.addToList(list); TestBench.addToList(list); TestBench.addToList(list); for (int x = 0; x < list.size(); x += 1 + x/3) { System.out.println("Removing element at index: " + x); list.remove(x); } System.out.println("Result"); System.out.println(list); System.out.println("Shuffling"); list.shuffle(7777); System.out.println(list); System.out.println("Removing duplicates (keeping first instance)"); list.removeDuplicates(); System.out.println(list); }} TestBench.java import java.util.AbstractList; public class TestBench { public static…Q6) Answer the following: [2 Marks] a) Write a small code fragment that generates a random integer number using Random class . b) How do you check whether a given key is contained in a map? (Give a Java code example.) c) Create a class MapTester. In it, use a HashMap to implement a phone Book. In this class, implement two methods: public void enterNumber(String name, String number) public String lookupNumber(String name) The methods should use the put and get methods of the HashMap class to implement their functionality