17. Phone Book ArrayList Write a class named PhoneBookEntry that has fields for a person's name and phone number. The class should have a constructor and appropriate accessor and mutator methods. Then write a program that creates at least five PhoneBookEntry objects and stores them in an ArrayList. Use a loop to display the contents of each object in the ArrayList.
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- • RectangleTest class:o Perform the following actions in the main method:▪ Create an object named r1 of the Rectangle class using the default constructor.▪ Using the set methods, initialize r1 to have width 3.0 and length 5.2.▪ Use the printDimensions method to output all the data (width & length) related to r1.▪ Create another object named r2 of the Rectangle class with width 2.6 and length 5.4using the overloaded constructor.▪ Print out r2 (width & length) using the get methods.▪ Print out the area and the perimeter of r1 using the calculateArea andcalculatePerimeter methods.▪ Print out the area and the perimeter of r2 using the calculateArea andcalculatePerimeter methodsComputer Science Part 2: Client Program with ArrayList Create a second client program. This program will contain an ArrayList of StudentGrades objects. The program will perform the following tasks: Create an instance of an ArrayList that will store three StudentGrades objects. Each element in the ArrayList represents student grades for a test (assessment). This means that each StudentGrades object stored by the ArrayList element represents the grades achieved by students for a single test. Prompt the user for the number of students in the class. The prompt text is: Enter the number of students in the course: [Keyboard Input] Add three new StudentGrades objects to the ArrayList. The StudentGrades objects should be populated with random values from 0 to 100. Use the enhanced for loop to print each of the StudentGrades objects to the console. Print a line containing the following text: “LAST ELEMENT BEFORE REMOVE:”. Print the value of the final element in the ArrayList under the heading.…Define a class called Book. This class should store attributes such as the title, ISBN number, author, edition, publisher, and year of publication. Provide get/set methods in this class to access these attributes. Define a class called Bookshelf, which contains the main method. This class should create a few book objects with distinct names and store them in an ArrayList. This class should then list the names of all books in the ArrayList. Enhance the program by providing a sort function, which will sort the books in ascending order of their year of publication. Create a few more Bookobjects with the same names but with different edition numbers, ISBNs, and years of publication. Add these new Book objects to the ArrayList, and display the book list sorted by book name; for duplicate books of the same name, sort the list by year of publication. (Hint: You will need to define a comparator class that takes two Book objects as parameters of the compareTo This method should do a two-step…
- This lab was designed to reinforce programming concepts from this lab, you will practice: Declaring and initializing ArrayList. Add elements to the Arraylist. Display the content of the ArrayList. Write a class name PhoneBookEntry that has fields for a person’s name and phone number. The class should have a constructor and the appropriate accessor and mutator methods. Then write a program that creates at least 5 PhoneBookEntry objects and stores them in an ArrayList. Use a loop to display the contents of each object in the ArrayList.Java Code Write a program in which you create a class called TextFileReader. The TextFileReader class must contain an instance variable consisting of an array of Strings 100 elements long. TextFileReader should have two constructors: a default constructor and a constructor that takes a String argument, which represents the name of a text file to be opened and read into the array of Strings. The first (default) constructor does not really do anything. If the second constructor is used, it will open the file and read the contents of the file into the array of Strings as follows: fill the array by having your program read one line of the file into each string until you have filled the array. Once the array is full, you may stop reading the input file. Add a member function contents(), which will convert the array of Strings into a single StringBuffer, which is then returned to the calling program so that it may be displayed. Add a second member function display(), which prints the array…Create an array of objects of the Person class, of size 4. Create three objects of the Person class, with values, and assign the objects to the array. Loop through the array and print the name, job, and email of all Personobjects.
- This program is going to maintain a list of customers’ names and bank account balances. Create a class called CustomerList with a main method that instantiates an ArrayList of String objects called customerName. Invoke the add method to add the following names into the ArrayList: Cathy Ben Jorge Wanda Freddie 2. Print each name in the ArrayList using a for loop. 3. Create another ArrayList object called customerBalance, to save users’ balance. What is the type of this ArrayList? double or Double? You just need to declare this ArrayList and leave it empty for now. 4. For each customer, print the name and ask the user to enter the initial balance for this customer. Save the initial balance into ArrayList customerBalance. Use a loop to get this done for all 5 customers. For example, the program should print out this for the first customer: Please enter the account balance for Cathy: (waiting for user’s input …) Code skeleton: for(int i=0; i<5;i++) { Print(“Please enter…This program is going to maintain a list of customers’ names and bank account balances. 1. Create a class called CustomerList with a main method that instantiates an ArrayList of String objects called customerName. Invoke the add method to add the following names into the ArrayList: Cathy Ben Jorge Wanda Freddie 1. Print each name in the ArrayList using a for a loop. 2. Create another ArrayList object called customerBalance, to save users’ balance. What is the type of this ArrayList? double or Double? You just need to declare this ArrayList and leave it empty for now. 3. For each customer, print the name and ask the user to enter the initial balance for this customer. Save the initial balance into ArrayList customerBalance. Use a loop to get this done for all 5 customers. The program should print out this for the first customer: Example: Please enter the account balance for Cathy: (waiting for user’s input …) Code: for(int i=0; i<5;i++) { Print(“Please enter the account balance…10.5 LAB: Count probations (EO) Students are put on probation if their GPA is below 2.0. Complete the Course class by implementing the countProbation() method, which returns the number of students with a GPA below 2.0. Given classes: Class Course represents a course, which contains an ArrayList of Student objects as a course roster. (Type your code in here) Class Student represents a classroom student, which has three fields: first name, last name, and GPA. Hint: Refer to the Student class to explore the available methods that can be used for implementing the countProbation() method. Ex: If the following students and their GPA values are added to a course: Henry Cabot with 3.2 GPABrenda Stern with 1.2 GPALynda Robison with 3.3 GPAJake Flynn with 1.8 GPA then the countProbation() method returns 2 and the program output is: Probation count: 2 Course.java import java.util.ArrayList; public class Course { private ArrayList<Student> roster; // Collection of Student…
- 2.2 A struct employeeType has been declared with two elements: name and salary.a. Declare an employeeType struct array for 100 employees. b. Write a code snippet of the loop that will accept the details of the 100 employees.Array Lists & Graphics: Create a project in Eclipse named Blinds. Include two classes: Rainbow and RainbowViewer. Using the colours in Table 1 in any order you want, create a 13 rows x 1 column arrangement of Rectangles (width = 500, height = 50) starting at x = 50, y = 50 with the BLACK square. Use an ArrayList to store the 13 rectangles that form the blinds. [Hint: While creating each rectangle, you can use a for loop. When ready, use the .fill method to paint them onto a JFrame (600x800) with title: “My ColourfulBlinds”.]1. Declare a (local) variable of type Person, create a new Object and assign the variable to this object. 2. Declare an ArrayList variable which can hold objects of type Person 3. Create a new ArrayList with objects of type Person and assign it to the existing variable persons.