should be selected using a file dialog box -- the name should not be passed to readVehicleData() as a parameter.
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You must now write a method readVehicleData() in the ReservationSystem class, that reads this data, creates corresponding Vehicle objects and adds those objects to vehicleList. The name of the file that you read from should be selected using a file dialog box -- the name should not be passed to readVehicleData() as a parameter.
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- We know that the first file name is stored at index zero in the ArrayList, and the list stores the file names as strings, so could we write the body of listAllFiles along the following lines? System.out.println(files.get(0)); System.out.println(files.get(1)); System.out.println(files.get(2)); etc. How many println statements would be required to complete the method?jave programming Suppose a Student class has the following attributesand methods: Student: int id (public), String name(public), double physicsMarks(private), doublechemistryMarks(private), double mathMarks (private),double totalMarks(public) Student(int id, String name, double physics_marks,double chemistry_marks){Assign the variables;} Now, you have to take input from a file named “input.txt”.In the first line of the file, there willbe the total number of students n. After that, therewill be n more lines, each linecontaining a student’s id, name, physicsMarks,chemistryMarksand mathMarks. Youhave to read each student’s information, create studentobjects using these information andstore the student objects in anArrayList. Use BufferedReaderto do this job. Print each student’s information sorted by the descendingorder of total_marks in an “Output.txt''file. Use the Comparator class to sort the ArrayList. Sample input.txt file: 334 rahim 100 20 40 44 karim 50 50 50 12 azim 100 100 55…shows the UserManagement class that contains the main methodof our program. It creates and adds several users, allows the user to search forthem interactively, and then prints all of the users in the collection.
- Thank you very much for explaining the absyract concept, it was very helpful and easier to understanc after you explained it. Today we are asked to modify the GridWriter class by adding additional collection style functionality, to throw an exception in case of an error. The GridWriter class should get two new methods: public int size() should return the number of GridItems stored in the GridWriter public GridItem get(int index) should return the stored GridItems by index. Consider the following code. The first line creates a GridWriter object. Then two items are added to the GridWriter. The index of the items will be 0, and 1. Notice how the for loop uses the size and get methods to print out the areas of the two items GridWriter gw = new GridWriter(40, 50); gw.add(new MyCircle(10, 10, 9)); gw.add(new MyRectangle(40, 0, 10, 10)); for (int i = 0; i < gw.size(); i++) { System.out.println(gw.get(i).getArea()); } Once you have these two methods working you…Write a main method, in which you should have an Arralylist of students, in which you should include every student. You should have a PhD student named Joe Smith. In addition, you should create an Undergraduate student object for each of your team members (setting their names). If you’re only one person doing the assignment, then you should just create one undergraduate object. For each undergraduate student, you should add add two courses (COIS 2240 and COIS 1020). Loop over the arraylist of students, print their names, if the student is an undergraduate student, print their courses.Now that I understand the classes, I must implement them within a backend file. How would I do this in the following? class FoodWastageTrackerBackend { public: FoodWastageTrackerBackend(const std::string &food_wastage_records_filepath) : food_wastage_records_filepath_{food_wastage_records_filepath} {} // Reads the food wastage records from the file at // food_wastage_records_filepath_, and loads those in memory. If the file is // empty, it is a no-op. Returns true if the file was read successfully, else // returns false. NOTE: This function should be called right after the object // instantiation. // // Example: // FoodWastageTrackerBackend backend{"path/to/some_file_name.JSON"}; // backend.LoadRecordsFromJsonFile(); bool LoadRecordsFromJSONFile(); // Writes the food wastage records from the memory to a JSON file at path // food_wastage_records_filepath_. Returns true if the file was written // successfully, else returns false. bool…
- Write a method named friendList that accepts a file name as a parameter and reads friend relationships from a file and stores them into a compound collection that is returned. You should create a map where each key is a person's name from the file, and the value associated with that key is a setof all friends of that person. Friendships are bi-directional: if Marty is friends with Danielle, Danielle is friends with Marty. The file contains one friend relationship per line, consisting of two names. The names are separated by a single space. You may assume that the file exists and is in a valid proper format. If a file named buddies.txt looks like this: Marty Cynthia Danielle Marty Then the call of friendList("buddies.txt") should return a map with the following contents: {Cynthia=[Marty], Danielle=[Marty], Marty:[Cynthia, Danielle]} Constraints: You may open and read the file only once. Do not re-open it or rewind the stream. You should choose an efficient solution. Choose data…In F3, students will be tasked with taking input from a file to create an *Array* of FeetInches (2 parameters). When all the FeetInches have been stored, any FeetInches at least 1 foot will be converted and added to an *ArrayList* of Circles (one parameter). Students will then complete the compareTo method found in the Circle class, sort the ArrayList of Circles, and then output the radius' of the new circle. The first integer in the file input will tell us how many FeetInches objects will be made using the fileInput, and the numbers after are the data for those Objects. Use this first integer in your for Loops. A template with main, Circle, and FeetInches class, as well as the file input, is attached below. Please follow along with comments and reach out if you have any questions. package f3_template; public class Circle implements Comparable <Circle>{//attribute private int radius; //constructorspublic Circle(){radius=0;}public Circle(int r){radius=r;}//accessorspublic…Write a Java program that prompts a user for vehicle data and stores it in a linked list, and then sorts the list in ascending order based on miles-per-gallon and writes the sorted data to a text file, you can follow these steps: Create a class named Vehicle with private fields: make (String), model (String), and milesPerGallon (double). Include getters and setters for these fields. Implement the Comparable interface for Vehicle class and override the compareTo() method to compare vehicles based on their milesPerGallon. Create a main class (for example, VehicleDriver.java) to handle user input and perform the necessary operations. Inside the main method, create a BufferedReader object for user input. Prompt the user to enter the number of vehicle data they want to enter and store it in a variable (for example, nVehicles). Use a loop to iterate nVehicles times and prompt the user to enter make, model, and miles per gallon for each vehicle. Create Vehicle objects using the input data…
- Create a TestTriangle class in an individual .java file. In the main method,(1) Create a Triangle object with default base and height values.(2) Create a Triangle object with specified base = 3 and height =4.BUILD a METHOD called MyMethod(). Show how you would advertise that this method may throw an “OverFlowException”Add a method called save to your Person class. This method will write the object out to a binary file. Use the Serializeable format. Name the file accountNumber.dat where accountNumber is the credit card number from the object. Code in Java /////////////////FIles given (Demo.java) \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\import java.util.ArrayList;import java.util.Collections;public class Demo {public static void main(String[] args) {Person test1 = new Person("Eachelle Balderstone",30526110612015L,9866.30,false);Person test2 = new Person("Brand Hallam",3573877643495486L,9985.21,false);Person test3 = new Person("Tiphanie Oland",5100172198301454L,9315.15,true);ArrayList<Person> list = new ArrayList<>();list.add(test1);list.add(test2);list.add(test3);Collections.sort(list);System.out.printf("%20s%20s%10s%10s\n", "Name", "Account Number", "Balance", "Cash Back");for (Person current : list) {System.out.println(current);}}}