Suppose we have a method with header: public ArrayList meth (ArrayList list, int n) Which of the following describes the general behaviour of this method? Select one: O a. It is not called on any object. It takes an ArrayList and an integer, and returns an ArrayList whose content type is the same type as the content type of the ArrayList it takes. O b. It takes two ArrayLists whose content is of the same type, and an integer, and returns an object of the content type of the ArrayLists. It is called on an ArrayList object, and takes another ArrayList object as its argument along with an integer. It returns an object of the same type as the contents of the ArrayLists. O d. It is called on an object of the type the method is declared in. It takes an ArrayList and an integer, and returns an ArrayList whose content type is the same type as the content type of the ArrayList it takes.
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- If a method given an ArrayList as a parameter calls a second method giving it the same ArrayList, and that second method deletes one of the elements, this will: (produce a non-deterministic result? trigger an error? have an effect? have no effect?) on the first ArrayList. Java uses: (pass by reference? pass by value?) So when an object is passed to a method, what is actually passed is just : (the name of the object? a pointer to the object? the index of the object?) . Select the correct answer4. Now examine the ArrayList methods in the above table, a) Which method retrieves elements from the ArrayList? b) Which method replaces the value of an element that already exists in the ArrayList? c) Which two methods initializes the value of an element? d) How do the two methods in (c) differ? Which method(s) would be appropriate in the above Java program (after we convert it to work with ArrayLists)?Write a java program that uses an ArrayList object to store the following set of names in memory: [Steve, Tim, Lucy, Pat, Angela, Tom] Now write some more code so that the same ArrayList object is augmented with the name 'Steve' after the name 'Lucy' After the ArrayList object has been augmented with the new name, display the original and new lists on the console (as shown below), to verify that the new name is positioned correctly in the list.
- A supermarket wants to reward its best customer of each day, showing the customer’s name on a screen in the supermarket. For that purpose, the store keeps an ArrayList.Create a class customer having id, name, gender, and bill provide appropriate getters/setters and constructors also provide toString method.In the Store class, make an ArrayList of customers, store name, and address implement methods public void addSale(Customer c) that will add customers to the arraylist.public void RemoveCustomer(int id);public void UpdateCustomerRecord(int Id);public displayAll();public String nameOfBestCustomer() to record the sale and return the name of the customer with the largest sale. public ArrayList nameOfBestCustomers(int topN) so that it displays the top customers, that is, the topN customers with the largest sales, where topN is a value that the user of the program supplies. Write a program that prompts following menu and ============================================…Write a Program in Java programming: Support you have an ArrayList containing random integers. These integers can be any number, and each integer can appear more than once. For example, [2, 19, 21, 19, 21, 1, 3, 3, 6, 21, .....] Your job is to write a method called findEvenFrequentNumbers(ArrayList<Integer> list) that returns an ArrayList which has all the numbers appears in even frequency and in increasing order. e.g. list = [2, 19, 21, 19, 21, 1, 3, 3, 6, 21], should return [3, 19] list = [3, 3, 3, 1, 2, 2, 2, 2, 2], should return [] list = [1, 1, 1, 1, 1], should return [1] Note that you need to provide a class with the main function and also the imports.JAVA, PLEASE THE PROGRAM SHOULD USE THE INITIAL ARRAYLIST AND TO EDIT IT NOT TO CREATE A NEW ONE Create a class called OurArrayList and implement the following methods. Do NOT createany auxiliary memory.Include a main method and test all your methods with appropriate examples.a. Write a method called scaleByK() that takes an ArrayList of integers as aparameter and replaces every integer of value K with K copies of itself. Forexample, if the list stores the values (4, 1 , 2, 0 ,3) before the method is called, itshould store the values (4, 4, 4, 4, 1, 2, 2, 3, 3, 3) after the method finishesexecuting. Zeroes and negative numbers should be removed from the list by thismethod
- Please Use java only. Inthisassignment,youwillimplementaclasscalledCustomIntegerArrayList. Thisclass represents a fancy ArrayList that stores integers and supports additional operations not included in Java's built-in ArrayList methods. For example, the CustomIntegerArrayList class has a “splice” method which removes a specified number of elements from the CustomIntegerArrayList, starting at a given index. For a CustomIntegerArrayList that includes: 1, 2, 3, 4, and 5, calling splice(1, 2) will remove 2 items starting at index 1. This will remove 2 and 3 (the 2nd and 3rd items). The Cu stomIntegerArrayList class has 2 different (overloaded) constructors. (Remember, an overloaded constructor is a constructor that has the same name, but a different number, type, or sequence of parameters, as another constructor in the class.) Having 2 different constructors means you can create an instance of the CustomIntegerArrayList class in 2 different ways, depending on which constructor you…In java A supermarket wants to reward its best customer of each day, showing the customer’s name on a screen in the supermarket. For that purpose, the store keeps an ArrayList.Create a class customer having id, name, gender, and bill provide appropriate getters/setters and constructors also provide toString method.In the Store class, make an ArrayList of customers, store name, and address implement methods public void addSale(Customer c) that will add customers to the arraylist.public void RemoveCustomer(int id);public void UpdateCustomerRecord(int Id);public displayAll();public String nameOfBestCustomer() to record the sale and return the name of the customer with the largest sale. public ArrayList nameOfBestCustomers(int topN) so that it displays the top customers, that is, the topN customers with the largest sales, where topN is a value that the user of the program supplies. Write a program that prompts following menu and ============================================…java Create a static method that: is called appendPosSum returns an ArrayList of Integers takes one parameter: an ArrayList of Integers This method should: Create a new ArrayList of Integers Add only the positive Integers to the new ArrayList Sum the positive Integers in the new ArrayList and add the Sum as the last element For example, if the incoming ArrayList contains the Integers (4,-6,3,-8,0,4,3), the ArrayList that gets returned should be (4,3,4,3,14), with 14 being the sum of (4,3,4,3). The original ArrayList should remain unchanged. public static void main(String[] args) { Scanner in = new Scanner(System.in); int size = in.nextInt(); ArrayList<Integer> list = new ArrayList<>(); for(int i=0; i < size; i++) { list.add(in.nextInt()); } System.out.println(appendPosSum(list)); } }
- public class PokerAnalysis implements PokerAnalyzer { privateList<Card>cards; privateint[]rankCounts; privateint[]suitCounts; /** * The constructor has been partially implemented for you. cards is the * ArrayList where you'll be adding all the cards you're given. In addition, * there are two arrays. You don't necessarily need to use them, but using them * will be extremely helpful. * * The rankCounts array is of the same length as the number of Ranks. At * position i of the array, keep a count of the number of cards whose * rank.ordinal() equals i. Repeat the same with Suits for suitCounts. For * example, if your Cards are (Clubs 4, Clubs 10, Spades 2), your suitCounts * array would be {2, 0, 0, 1}. * * @param cards * the list of cards to be added */ publicPokerAnalysis(List<Card>cards){ this.cards=newArrayList<Card>(); this.rankCounts=newint[Rank.values().length]; this.suitCounts=newint[Suit.values().length];…In the existing CircularlyLinkedList class, Write a non-static method named getMax for finding the maximum element in a circularly linked list. Write the testing code in the main method of the class CircularlyLinkedList. For this purpose, you must only use and update the CircularlyLinkedList.java file provided in Lesson3Examples posted in the eCentennialmodule "Lesson Examples (from textbook)" package exercise3; public class CircularlyLinkedList<E> { private static class Node<E> { private E element; private Node<E> next; public Node(E e, Node<E> n) { element = e; next = n; } public E getElement() { return element; } public Node<E> getNext() { return next; } public void setNext(Node<E> n) { next = n; } } private Node<E> tail = null; private int size = 0; public CircularlyLinkedList() { } public int size() { return size; } public boolean isEmpty() { return size == 0; } public E first() { if (isEmpty()) return null; return…To demonstrate working with ArrayLists, we will be working with four source files: a Dessert class, two classes that extend Dessert called IceCream and Cake, and a TestDessert class. The TestDessert class contains a main() method that declares an ArrayList to hold Dessert objects. This ArrayList is referenced by the variable named "list". Examine TestDessert's main() method and notice the four comments. You are to implement code that accomplishes the tasks described in each step. For step 1, you are to populate the ArrayList with 10 IceCream and Cake objects. These objects should be inserted into the ArrayList at random. This means each run of the program should produce an ArrayList with different proportions of IceCream and Cake objects. After this operation, the ArrayList should contain 10 total objects (IceCream and Cake objects). Display the ArrayList after the operation. For step 2, if the first and last dessert in the ArrayList are different (one is IceCream and the other is…