Write a "contains(Object element)" method in Java for a hash set made up of an ArrayList of linked lists.  public boolean contains(Object element) {} returns true if found, false if not.

Question 2: Using only LLNode java cass. Create a demo cass called LinkedlistDemo java. In this demo class, write a public static method called SumNode that receives a reference caled list of type LLNode of integer values. Your method shoukl sum all the nodes content and then add a new node contains the summation to the end of the list. For example, if the list contains: list Then after calling the method SumNode, the list becomes: list 36 11------- Paste SumNode code below this line Good Luck O

In python. Write a LinkedList class that has recursive implementations of the add and remove methods. It should also have recursive implementations of the contains, insert, and reverse methods. The reverse method should not change the data value each node holds - it must rearrange the order of the nodes in the linked list (by changing the next value each node holds). It should have a recursive method named to_plain_list that takes no parameters (unless they have default arguments) and returns a regular Python list that has the same values (from the data attribute of the Node objects), in the same order, as the current state of the linked list. The head data member of the LinkedList class must be private and have a get method defined (named get_head). It should return the first Node in the list (not the value inside it). As in the iterative LinkedList in the exploration, the data members of the Node class don't have to be private. The reason for that is because Node is a trivial class…

JAVA please 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 Code provided in the assignment ItemNode.java: