Create a simple menu-like JAVA program that will act like a virtual classroom using the singly linked list. The program should allow users to add and delete subjects as well as update their calendars and to-do lists.

Write a program using PHYTHON to create a grocery list where the user will add items one at a time until entering the word "STOP".At that point, the program will print out the items in the grocery list, 1 item per line.

using Java, create a virtual shopping store. using the two txt files (items and sale), display a list of items, price and if on sale. have the user select what items they want until they press 'q' to quit. show list of what they purchased, add the total and how much they saved.   class BillProcessor {public static void prepareBill(LinkedHashMap<String, Integer> purchases, LinkedHashMap<String,Double>items, LinkedHashMap<String,String> sales, ArrayList<String> itemNames) {total cost = 0total discount = 0for each item in purchases:compute the regular costif item is subject to a sale (i.e. it appears in the sales lhm)determine the sales price if it's bogo - mod operator and the int/intif it's not bogo - apply the discount pricecompute the actual cost based on thattotal cost = total cost + actual costtotal disc = total disc + discountprint a line formatted like the example that summarizes the purchase of that itemprint the summary}} public class KlumpGroceryStore…

Write a menu driven program which will maintain a list of car models, theirprice, name of the manufacturer, engine capacity, etc., as a doubly linked list. Themenu should make provisions for inserting information pertaining to new carmodels, delete obsolete models, update data such as price, in addition to answeringqueries such as listing all car models within a price range specified by the client andlisting all details, given a car model.

Ask the user for a starting point and ending point. Sort the user list using the method on the previous question but only display the users within the entered range. Here is the data text. I cant copy and paste it because it is too long. https://textuploader.com/t1ol7 I already Have a code but it doesn't sort right. I believe there is something wrong. The pic without red should be the correct answer. import java.io.File;import java.io.FileNotFoundException;import java.util.ArrayList;import java.util.Scanner;public class ggk{public static void main(String[] args){String filename = "user-database.txt";Scanner infile = null;try {infile = new Scanner(new File(filename));} catch (FileNotFoundException e) {System.out.println(e.getMessage());}ArrayList<String> usernames = new ArrayList<String>();ArrayList<String> passwords = new ArrayList<String>();int start, end;Scanner input = new Scanner(System.in);System.out.println("Enter a starting point and ending point");start…

Write a simple airline ticket reservation system program. The program should display a menu withfollowing options: Reserve a ticket, cancel a reservation, check whether a ticket is reserved for aparticular person and display the passengers. The information is maintained alphabetized link listof names. In a simpler version of the program, assume that tickets are reserved for only one flight.In a fuller version, place no limit on the number of flights. Create a link list of flights with eachnode including a pointer to a link list of passengers.   Note: Write code in DSA C++.   Note: Don't copy paste write it your own.

Write a Java program that incorporates a loop that prompts the user for student data. Student data are private fields in a student class including: String name String address double GPA Each student object is stored in a linked list. After the user completes the data entry, output the contents of the linked list in ascending sorted order by name to a regular text file that can be opened and viewed using a simple plain-text editor such as notepad. Validate numeric data for Grade Point Average (GPA).

Develop a simple program in Java to maintain a list of homework assignments. When an assignment is assigned, add it to the list, and when it is completed, remove it. You should keep track of the due date. Your program should  1. Add a new assignment. 2. Remove an assignment. 3. Provide a list of the assignments in the order they were assigned. 4. Find the assignment(s) with the earliest due date.

please create a simple python script for this exercise with an explanation of how it works. I have attached my starter code and desired outcome in the images. my starter # Program to simulate a speed dialer# Complete the four functions listed below that work with# two global lists that manage a dialer with 5 fixed slots.# Initialize the dialer with empty data.dialerNames = ["Empty", "Empty", "Empty", "Empty", "Empty"]dialerNumbers = ["Empty", "Empty", "Empty","Empty", "Empty"] #function to show the current dialer datadef printList():for i in range(len(dialerNames)):print((i + 1),dialerNames[i],dialerNumbers[i], sep="\t")#Function to handle dial by slot number command which# prompts the user for the slot number# validates the slot number# if not within valid range (1 through 5), prints "Invalid slot number"# if user enters non-integer input, prints "Please enter integer" using# try/except code block. # else checks if the slot at given slot number is empty, if so prints "Slot empty"#…

A folder is a list of files and folders. Write a program that takes thename of a folder as a command-line argument and prints out all of the files containedin that folder, with the contents of each folder recursively listed (indented) under thatfolder’s name. Hint : Use a queue, and see java.io.File.