Assume you have a method (shown below) inside the KWArrayList class, what does this method do? public boolean ArrayMethod (E item) { if (size == capacity) reallocate(); theData[size] = item; size++; return true; } A Add an item to the beginning of the list and return true. B Remove the first occurrence of an item from the list and return true. Add an item at the end of the list and return true.
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- Assume 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.Assume that the following method is added to the class KWLinkedList. What does this method do? public boolean question() { if (size%2 == 1 || size < 2) return false; Node<E> h = head; for(int i = 0; i < size/2; i++) h=h.next; Node<E> p = head; while (h!= null) { if (! p.data.equals(h.data)) return false; p = p.next; h = h.next; } return true; } Compare the elements of the first half of the list with the second half, if any one node has the same data value, it will return false, else it will return true. Compare the elements of the first half of the list with the second half, if all the nodes have the same data values, it will return true else, it will return false. Compare the elements of the first half of the list with the second half, if all the nodes have the same data values, it will return false else, it will return true…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…Write the method filterBySize().* * Given an ArrayList of String, return a new list where only * strings of the given length are retained.* * Examples:* filterBySize(["a", "bb", "b", "ccc"], 1) returns ["a", "b"]* filterBySize(["a", "bb", "b", "ccc"], 3) returns ["ccc"]* filterBySize(["a", "bb", "b", "ccc"], 4) returns []Write a method markLength4 that takes an ArrayList of Strings as a parameter and that places a String of four asterisks ("****") in front of every String of length 4. For example, suppose that an ArrayList called "list" contains the following values: (this, is, lots, of, fun, for, every, Java, programmer) And you make the following call: markLength4(list); Then list should store the following values after the call: (****, this, is, ****, lots, of, fun, for, every, ****, Java, programmer) Notice that you leave the original Strings in the list (this, lots, Java) but include the four-asterisk String in front of each to mark it. You may assume that the ArrayList contains only String values, but it might be empty.
- Using JAVA, write a method that modifies an ArrayList<String>, moving all strings starting with an uppercase letter to the front, without otherwise changing the order of the elements. Write a test program to demonstrate the correct operation of the method.Implement unique method that takes an ArrayList as input and returns an ArrayList withexactly a single occurrence of each element from the input list. For example, if the input listcontains 5, 6, 7, 6, 3, 5, 5, 4 then the output list should have 5, 6, 7, 3, 4.Note: (1) You may assume that the ArrayList has a specific type of elements in it. In the class, we assumedit to have String type values. (2) You may only work with ArrayList(s).Trying this again since part of my question keeps disappearing Given main() in the ShoppingList class, define an insertAtEnd() method in the ItemNode class that adds an element to the end of a linked list. DO NOT print the dummy head node. Ex. if the input is: 4 Kale Lettuce Carrots Peanuts where 4 is the number of items to be inserted; Kale, Lettuce, Carrots, Peanuts are the names of the items to be added at the end of the list. The output is: Kale Lettuce Carrots Peanuts public class ItemNode { private String item; private ItemNode nextNodeRef; // Reference to the next node public ItemNode() { item = ""; nextNodeRef = null; } // Constructor public ItemNode(String itemInit) { this.item = itemInit; this.nextNodeRef = null; } // Constructor…
- 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.Write a method manyStrings that takes an ArrayList of Strings and an integer n as parameters and that replaces every String in the original list with n of that String. For example, suppose that an ArrayList called "list" contains the following values: ("squid", "octopus") And you make the following call: manyStrings(list, 2); Then list should store the following values after the call: ("squid", "squid", "octopus", "octopus") As another example, suppose that list contains the following: ("a", "a", "b", "c") and you make the following call: manyStrings(list, 3); Then list should store the following values after the call: ("a", "a", "a", "a", "a", "a", "b", "b", "b", "c", "c", "c") You may assume that the ArrayList you are passed contains only Strings and that the integer n is greater than 0.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.