Computer Science create a method +addToList(o:E):void that adds the object (o) to the ArrayList referenced by the instance variable list. create a method +removeFromBackOfList():E that removes the object at the back of the ArrayList and returns it.
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- java Create a static method that: is called repeatAll returns ArrayList of Booleans takes in a single parameter - an ArrayList of Booleans This method should modify its ArrayList parameter by repeating its ArrayList values. For example, if the parameter is (true, false, false) The modified ArrayList should be (true, false, false, true, false, false) public static void main(String[] args) { Scanner in = new Scanner(System.in); int size = in.nextInt(); ArrayList<Boolean> list = new ArrayList<>(); for(int i=0; i < size; i++) { list.add(in.nextBoolean()); } System.out.println(repeatAll(list)); } }public static ArrayList findExactString(String s, ArrayList myArray) { return null; } // Use the above method, findExactString, as a helper method to implement addWithoutDuplication method. The addWithoutDuplication method has the following properties: 1- It takes two arguments, a string s and an ArrayList myArray of type string. 2- It returns an integer which represents the number of occurrences of the string s in myArray while attempting to add it. 3- If myArray is null, it returns -1 4- If adds the string s to the end of the ArrayList myArray if the string s is not already there. public static int addwithout Duplication(String s, ArrayList myArray) { return -1;Implement the following method where: 1. String s is a given string 2. myArray is an array list that contains strings 3. The method findExactString will take the string s and the arraylist myArray and return an arraylist that contains the indices of all strings in myArray that matches the string s. If the reference to the string is null and the reference to the string inside the array is also null, string s is considered to be a equal to the string in arraylist. public static ArrayList findExactString(String s, Arraylist myArray) { return null;
- java Create a static method that: is called combineAL returns an ArrayList<Integer> takes two parameters: an ArrayList of numbers called numbersOne, and another ArrayList of numbers called numbersTwo This method should create a new ArrayList of Integer, add all the numbers (in order) from numbersOne, then add all the numbers (in order) from numbersTwo. In other words, it is combining all the elements from the two lists. public static void main(String[] args) { Scanner in = new Scanner(System.in); int size = in.nextInt(); int size2 = in.nextInt(); ArrayList<Integer> list = new ArrayList<>(); ArrayList<Integer> list2 = new ArrayList<>(); for(int i=0; i < size; i++) { list.add(in.nextInt()); } for(int i=0; i < size2; i++) { list2.add(in.nextInt()); } System.out.println(combineAL(list, list2));Write Java code for the following: Create an Arraylist that can hold Integer objects. Check and display whether the Arraylist is empty or not. Add an element 50 into the Arraylist. Add another element 60 in the position of 0 in the Arraylist. Replace the element to 70 in index 1.The implementation of a queue in an array, as given in this chapter, uses the variable count to determine whether the queue is empty or full. You can also use the variable count to return the number of elements in the queue. On the other hand, class linkedQueueType does not use such a variable to keep track of the number of elements in the queue. Redefine the class linkedQueueType by adding the variable count to keep track of the number of elements in the queue. Modify the definitions of the functions addQueue and deleteQueue as necessary. Add the function queueCount to return the number of elements in the queue. Also, write a program to test various operations of the class you defined.
- java Create a static method that: is called removeAll returns ArrayList<String> takes two parameters: an ArrayList of Strings called wordList, and a String called targetWord This method should go through every element of wordList and remove every instance of targetWord from the ArrayList. Example: ArrayList<String> wordList = new ArrayList<String>(Arrays.asList("hi","hey","hi","yo")); removeAll(wordList,"hi"); wordList: ["hey","yo"] public static void main(String[] args) { Scanner in = new Scanner(System.in); int size = in.nextInt(); String target = in.next(); ArrayList<String> list = new ArrayList<>(); for(int i=0; i < size; i++) { list.add(in.next()); } System.out.println(removeAll(list, target)); } }In what ways may an ArrayList be analysed?Write the following method that returns themaximum value in an ArrayList of integers. The method returns null if thelist is null or the list size is 0.public static Integer max(ArrayList<Integer> list)Write a test program that prompts the user to enter a sequence of numbers endingwith 0 and invokes this method to return the largest number in the input.
- 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 This method gets an Arraylist of Integers and a number(Integer). It returns an Arraylist. It removes any instance of the given number from the Arraylist. Example: romoveInst([1,1,2,3,1,4],1) returns: [2,3,4] romoveInst([3,4,3,3],4) returns: [3,3,3] public static ArrayList<Integer> removeInst(ArrayList<Integer> r,Integer n) public static void main(String[] args) { Scanner in = new Scanner(System.in); int size = in.nextInt(); int n = in.nextInt(); ArrayList<Integer> list = new ArrayList<>(); for(int i=0; i < size; i++) { list.add(in.nextInt()); } System.out.println(removeInst(list, n)); } }Explain the fundamental difference between an array and an arraylist.
