Assume ArrayList productList contains 10,000 items. Which operation is performed fastest? Group of answer choices productList.remove(999) productList.remove(0) productList.add(0, item) productList.add(item)
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- Create an arraylist of 10 students. Use the following methods: add, remove, insert, size, capacity, contains ,and clear i am using java netbeansIf arraylist contain "apple", "orange", "mango", "grapes". What indexOf("melon") doAssume that the following method is within the KWLinkedList class, what does this method do? public boolean undefined(E item) { if(head == null) return false; Node<E> p = head.next; Node<E> newNode= new Node<E>(item, p); newNode.prev = head; head.next = newNode; p.prev = newNode; size++; return true; } nserts a new node with its data as item at the front of the list. Inserts a new node with its data as item after the first node of the list. Deletes the node with its data as item. Inserts a new node with its data as item, at the end of the list.
- Which element is stored at index 1 after the following sequence? ArrayList<String>groceryList;groceryList=newArrayList<String>();groceryList.add("Bread");groceryList.add("Apples");groceryList.add("Grape Jelly");groceryList.add(1,"Peanut Butter");groceryList.set(1,"Frozen Pizza");groceryList.remove(1); Bread Peanut Butter Apples Frozen Pizza For the given code, when is numType.setText() called? publicclassOddEvenextendsJFrameimplementsChangeListener{privateJSpinnernumSpinner;privateJTextFieldnumType;...numSpinner.addChangeListener(this);...@OverridepublicvoidstateChanged(ChangeEventevent){IntegernumValue;numValue=(Integer)numSpinner.getValue();if(numValue%2==0){numType.setText("Even");}else{numType.setText("Odd");}}...} Every time numSpinner's value changes Only the first time numSpinner's value changes Every time numSpinner's…Refactore UIMenuBuilder/UIFormBuilder to remove redundant and copied code. public final class UIFormBuilder {private final List<Pair> _menu = new ArrayList<Pair>();public void add(String prompt, UIFormTest test) {_menu.add(new Pair<String, UIFormTest>(prompt, test));}public UIForm toUIForm(String heading) {if (null == heading)throw new IllegalArgumentException();if (_menu.size() < 1)throw new IllegalStateException();Pair[] array = new Pair[_menu.size()];for (int i = 0; i < _menu.size(); i++)array[i] = _menu.get(i);return new UIForm(heading, array);}} public class UIMenuBuilder { private final List<Pair<String,UIMenuAction>> _menu; public UIMenuBuilder() { _menu = new ArrayList<Pair<String,UIMenuAction>>(); } public UIMenu toUIMenu(String heading) { if (null == heading) throw new IllegalArgumentException(); if (_menu.size() <= 1) throw new IllegalStateException();…Need help with the parts that say TODO in images , This may be needed scoresheet code below package edu.vtc.cis2271.yahtzee; import java.util.ArrayList;import java.util.HashSet;import java.util.List;import java.util.Set; public class Scoresheet{ private static final int SMALL_STRAIGHT_SCORE = 30;private static final int LARGE_STRAIGHT_SCORE = 40;private static final int FULL_HOUSE_SCORE = 25;private static final int YAHTZEE_SCORE = 50;private static final int TOP_HALF_BONUS = 35;private static final int TOP_HALF_BONUS_LEVEL = 63; @SuppressWarnings("javadoc")public enum Category {Ones,Twos,Threes,Fours,Fives,Sixes,SmallStraight,LargeStraight,ThreeOfKind,FourOfKind, FullHouse, Yahtzee,Chance} public Scoresheet(){_scores = new int[Category.values().length];_listeners = new ArrayList<>();for (int i = 0; i < _scores.length; i++)_scores[i] = -1;} public void addScoreSheetListener(ScoreSheetListener listener){_listeners.add(listener);} public void…
- Write a dynamic arraylist for food menu where user can add new menu into list using JAVA that also can be save into text file and view from text fileAre they equivalent? 1) ArrayList list = new ArrayList(); 2) ArrayList<Object> list = new ArrayList<>();Please do not give solution in image format thanku USING JAVA Modify the code to use Arraylist Instead of HashmapCODE:import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;class Student {private String name;private List<String> certificates;public Student(String name) {this.name = name;this.certificates = new ArrayList<>();}public void addCertificate(String certificate) { certificates.add(certificate);}public boolean hasCertificate(String certificate) {return certificates.contains(certificate);}public String getName() {return name;}}public class CertificateManagement {public static void main(String[] args) { Map<String, Student> students = new HashMap<>();Student student1 = new Student("John");student1.addCertificate("Java");student1.addCertificate("Python");students.put("John", student1);Student student2 = new Student("Alice");student2.addCertificate("C++");students.put("Alice", student2);Student student3 = new…
- Design and implement a getLastHalf() method for the MyLinkedList class. The method should return the last half of the list as a new list leaving the original list intact. If the list has an uneven number of elements the extra one element must be in the list returned. Example : [1,3,5,4] return [5,4] and [1,6,9] return [6,9]. Follow the three step method for designing the method Develop the java code for the method Create a test program to test the method thoroughly using the Integer wrapper class.Design and implement a getLastHalf() method for the MyLinkedList class. The method should return the last half of the list as a new list leaving the original list intact. If the list has an uneven number of elements the extra one element must be in the list returned. Example : [1,3,5,4] return [5,4] and [1,6,9] return [6,9]. Follow the three step method for designing the method Develop the java code for the method Create a test program to test the method thoroughly using the Integer wrapper class. public class MyLinkedList<E> { private Node<E> head, tail; public MyLinkedList() { head = null; tail = null; } /** Return the head element in the list */ public E getFirst() { if (head == null) { return null; } else { return head.element; } } /** Return the last element in the list */ public E getLast() { if (head==null) { return null; } else { return tail.element; } } /** Add an element to the beginning of the list */ public void prepend(E e) { Node<E> newNode = new…A readinglist is a doubly linked list in which each element of the list is a book. So, you must make sure that Books are linked with the previous prev and next element. A readinglist is unsorted by default or sorted (according to title) in different context. Please pay attention to the task description below. Refer to the relevance classes for more detail information. Implement the add_book_sorted method of the ReadingList class. Assume the readinglist is sorted by title, the add_book_sorted method takes an argument new_book (a book object), it adds the new_book to the readinglist such that the readinglist remain sorted by title. For example, if the readinglist contain the following 3 books: Title: Artificial Intelligence Applications Author: Cassie Ng Published Year: 2000 Title: Python 3 Author: Jack Chan Published Year: 2016 Title: Zoo Author: Cassie Chun Published Year: 2000 If we add another book (titled "Chinese History"; author "Qin Yuan"; and published year 1989) to the…