The ADT stack lets you peek at its top entry without removing it. For some applications of stacks, you also need to peek at the entry beneath the top entry without removing it. We will call such an operation peek2. If the stack has more than one entry, peek2 returns the second entry from the top without altering the stack. If the stack has fewer than two entries, peek2 throws an exception. Write a linked implementation of a stack class call First_Last_LinkStack.java that includes a method peek2

I have already done number 1. I just need help with number 2.  Implement Stack<E> with an internal LineNodePlus<E>. You have been given the code for the StackADT<E> interface and all of the List files needed. You must come up with a new Stack.java that implements the StackADT interface and uses a LineNodesPlus internally to store the stack.  Construct test cases for the Stack (StackTest.java) to ensure it works correctly. StackADT.java public interface StackADT<E>{ // Stack class ADT     /**     * Clears the stack.     */    public void clear();     /**     * Pushes argument it onto the stack. Argument is stored in the top of the     * stack. Returns false if the stack is out of space.     *     * @param it value to be pushed onto the stack     * @return true if the value is stored     */    public boolean push(E it);     /**     * Pop and return the value at the top of the stack.     *     * @return value stored at the top of the stack     */    public E…

PP 13.3 Create a new version of the LinkedStack class that makes use of a dummy record at the head of the list. PP 13.4 Create a simple graphical application that will allow a user to perform push, pop, and peek operations on a stack, and display the resulting stack (using toString) in a text area.

What is the best way to implement a stack or a queue so that it can hold an arbitrary number of elements? Select one: a. Using an array, and throwing an exception when the stack or queue is full. b. By creating a bigger array when the stack or queue is full, and copying the elements from the original array. c. Using linked lists to store the collection of elements.

PP 13.3 Make a new version of the LinkedStack class that includes a fake record at the beginning of the list. PP 13.4 Create a basic graphical programme that allows a user to execute push, pop, and peek operations on a stack and displays the resulting stack in a text area (using toString).

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:

stacks and queues. program must be able to handle all test cases without causing an exception Note that this problem does not require recursion to solve (though you can use that if you wish).

Project Overview: This project is for testing the use and understanding of stacks. In this assignment, you will be writing a program that reads in a stream of text and tests for mismatched delimiters. First, you will create a stack class that stores, in each node, a character (char), a line number (int) and a character count (int). This can either be based on a dynamic stack or a static stack from the book, modified according to these requirements. I suggest using a stack of structs that have the char, line number and character count as members, but you can do this separately if you wish.Second, your program should start reading in lines of text from the user. This reading in of lines of text (using getline) should only end when it receives the line “DONE”.While the text is being read, you will use this stack to test for matching “blocks”. That is, the text coming in will have the delimiters to bracket information into blocks, the braces {}, parentheses (), and brackets [ ]. A string…

What is the operation that adds items to a stack? Get Set Pop Push

OCaml Code: The goal of this project is to understand and build an interpreter for a small, OCaml-like, stackbased bytecode language. Make sure that the code compiles correctly and provide the code with the screenshot of the output. Make sure to have the following methods below:    -Push integers, strings, and names on the stack -Push booleans -Pushing an error literal or unit literal will push :error: or :unit:onto the stack, respectively -Command pop removes the top value from the stack -The command add refers to integer addition. Since this is a binary operator, it consumes the toptwo values in the stack, calculates the sum and pushes the result back to the stack - Command sub refers to integer subtraction -Command mul refers to integer multiplication -Command div refers to integer division -Command rem refers to the remainder of integer division -Command neg is to calculate the negation of an integer -Command swap interchanges the top two elements in the stack, meaning that the…