Suppose we have a class called App that has a main method (so that it is a program as well as creating a new data type). Which of the following compiles and then runs the program using a shell (cmd in Windows or terminal on a Mac/Linux)?
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- For an array of objects The array can contain objects of different types at run time but must be defined as the same object type in Java code. The array can contain objects of different types at run time and can be defined as different object types in Java code. The array can't contain objects of different types at run time and must be defined as the same object type in Java code. The array can't contain objects of different types at run time but can be defined as different object types in Java code.Suppose we have a class called App that has a main method (so that it is a progra as well as creating a new data type). Which of the following compiles and then rui the program using a shell (cmd in Windows or terminal on a Mac/Linux)? javac App.java java App compile App.java run App All of these will compile and run the program. javac App.java java App.class javac App java AppYou need 5 java classes and these include Netflix Class (Parent class of Movie and TVShow class) Movie Class TVShow Class Test/TestDriver Class Database Class Please read the questions carefully. TestDriver is given for the other image.
- in java You are required to develop a small chatting application where two or more friends can communicate each other through messages. Create a class Message which has Date date, and message (string). Provide getters/setters, constructors, toString. Create a class Friend having String name, String contact, email provide getters/setters, constructors, toString. Provide following options to the user. Add Friend (which add new friend to the Friends file) View Friends (read data from Friends file and display) Send message (This should ask for friend name and message match the friend name and write that message to the inbox file). Read messages (This show all messages form inbox on JList or Text area.Language - Java Create a utility class called DuplicateCounter. Create an instance method called count that takes a single parameter called dataFile (representing the path to a text file) and uses a Map of Strings to count how many times each word occurs in dataFile. The counts should be stored in an instance variable called wordCounter. Create an instance method called write that takes a single parameter called outputFile (representing the path to a text file) and writes the contents of wordCounter to the file pointed to by outputFile. The output file should be overwritten if it already exists, and created if it does not exist. Create a separate class called Application that contains a main method which illustrates the use of DuplicateCounter by calling both the remove and write methods. Your input file must be called problem2.txt and your output file must be called unique_word_counts.txIN JAVA The class Movie is started below. An instance of class Movie represents a film. This class has the following three class variables: • title, which is a String representing the title of the movie • releaseYear, which is an int representing the year in which the movie was released • rating, which is a double representing a rating of the movie (just assume it’s from IMDB) Create a class first. After that, add the following to your class: a) Write a constructor for the class Movie, which takes a String representing the title of the movie, an int representing the year the movie was released, and a double representing the rating as its arguments, and sets the respective class variables to these values. b) Write a second constructor for the class Movie, which takes a String representing the title of the movie and an int representing the release year, and sets the respective class variables to these values, while the class variable rating is set to 0. c) Create a variable that…
- DescriptionIn this assignment, you are required to implement an electronic programming quiz system. User can createquestions and preview the quiz.Your TaskYou are asked to write a Java program for the programming quiz system. There are two types of questions:Multiple Choice Question and Ture/False Question. User can create questions using the system; andpreview the quiz, which display all questions in the system one by one. During the preview, the user canattempt the quiz by entering his/her answers to questions. The system will then immediately check theanswer and calculate. After attempting all questions, the total score will be displayed. A sample run of theprogram is shown as below (Green text refers to user input): Please choose (c)reate a question, (p)review or (e)xit >> cEnter the type of question (MC or TF) >> MCEnter the question text >> Each primitive type in Java has a correspondingclass contained in the java.lang package. These classes are called…Develop a set of classes for a college to use in various student service and personnel applications. Classes you need to design include the following: •• Person—A Person contains a first name, last name, street address, zip code, and phone number. The class also includes a method that sets each data field, using a series of dialog boxes and a display method that displays all of a Person’s information on a single line at the command line on the screen. •• CollegeEmployee—CollegeEmployee descends from Person. A CollegeEmployee also includes a Social Security number, an annual salary, and a department name, as well as methods that override the Person methods to accept and display all CollegeEmployee data. •• Faculty—Faculty descends from CollegeEmployee. This class also includes a Boolean field that indicates whether the Faculty member is tenured, as well as methods that override the CollegeEmployee methods to accept and display this additional piece of information. •• Student—Student…Constructors in Java Create a constructor for the Phone class that accepts three values: brand storage price Then, ask the user for the values of these attributes. Use the constructor to create the object and finally, print the values of the attributes. Inputs 1. Brand 2. Storage 3. Price Sample Output Brand: TestBrand Storage: 128 Price: 50000 TestBrand has a memory of 128 GB and a price of Php50000!
- in java Create a class for Student and implement all the below listed concepts in your class. Read lecture slides for reference. Class Name: Student 1. Data fields studentID name email majorDepartmentSelect proper datatypes for these variables. 2. Constructors – create at least 2 constructors No parameter With parametersSet id and name using the constructor with parameters. 3. Methods toString method : To print the details of the Student. Setter and getter methods 4. A static variable count : To keep the count of Student objects5. Visibility Modifiers: private for data fields and public for methods 6. Write some test cases in main methodThis code is in java.codeHS under Classes and Object-Oriented Programming Personal Information: You will create a driver file called personalInfo.java personalInfo.java will ask if you are a person (super class), teacher, or student. (sub classes) If a person, you will ask them (using scanner) to enter their First Name, Last Name, Street Address and Phone Number (all should be strings.) If they are a teacher, you will ask them to enter all the person info listed above, plus the number of years teaching as an int.(scanner) If they are a student, they will enter all the person info listed above, plus year of graduation as an int and GPA as a double.(scanner) Each class should have a default constructor that initializes the strings to a blank string and all ints or doubles to 0. You should then have an overloading constructor that takes in the information. Remember sub-classes inherit the super classes constructor. All three classes will then have an overriding method…Define a Student class, with 3 data fields: ID: string Name: string FavoriteThing: string Create an application that stores and outputs a list of the students' favorite things. Suppose each student only has one favorite thing.