Write a java program that saves and displays the Student Record. • Ask the user to enter the data • Save and display the data • Ask the user to update the data • Repeat (use loop) and ask the user to continue or not Code: • Create a class named Student • Create 2 objects for class Student • Create the public set and get the method for the Student class • Create a static method for displaying student record
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- Write a java class named PhoneRecord.java that performs the following commands: private int numRecords - number of records in the array private PhoneRecord[] data - array of PhoneRecord objects public Phone Directory() - constructor that should initialize memory for data array and numRecords value. public void enterPhoneRecords(PhoneRecord new record) - store a new phone record in the database. public void findPhoneRecord(String key) - Search the database for records whose names begin with the search key. This method will display all names that begin with the characters entered by the user. If the customer number is not in the array, the program will print that "the phone record does not exist".Write another Java class named Patient that contains: ■ A private integer data field called id. ■ A private static integer data field called numberOfPatients that counts the number of Patient objects created (default value 0). ■ A private String data field called name. ■ A private Address variable called address. ■ A private File variable called file that refers to a database.txt file. ■ A constructor that creates a patient object with specified name and address. Note that the id of patients is auto-incremented. If 3 patients are created the first one would have id 1, the second id would be 2 and the third id 3. ■ A static method getNumberOfPatients() that returns the number of patients. ■ A method getId() that returns the patient’s id. ■ A toString() method that returns a one-line description of the patient. ■ A savePatientToFile() method that is called every time a new patient object is created to save the patient information (patient object) to the database file.Write a java class named PhoneDirectory that contains the following data attributes and methods: private int numRecords - number of records in the array private PhoneRecordI [] data - array of PhoneRecord objects public PhoneDirectory () - constructor that should initialize memory for data array and numRecords value public void enterPhoneRecords(PhoneRecord new_record) - store a new phone record in the database public void findPhoneRecord(String key) - Search the database for records whose names begin with the search key. The user doesn't need to enter an entire name. This method will display all names that begin with the characters entered by the user. If the customer number is not in the array, the program will print that "the phone record does not exist"
- Please create a java class that contains the following data attributes and methods: private int customerNumber - a unique number assigned to each customer private String firstName - the customer's first name private String lastName - the customer's last name private float balance - the customer's balance get/set Methods for each data attribute public String toString() - Special method to be used when printing a customer Record objectWrite a Java program called Process marks (using files). The program must read the marks of students from a text file and process the marks. The results must be saved in a text file called result. 2.1 Write a Student class with the following instance fields: Name of student arrMarks (integer) // 4 marks out of 100 The class must contain a parameterised constructor and get methods for the two instance fields. Write a method called calcAve() to calculate and return the average mark. Write a method called didPass() to determine whether the student passes the module with an average of at least 50%. Return the word Pass or Fail. Write a toString() method to construct and return the following string of student data: Name of student 4 marks Peter Sampson 40 50 40 30 2.2 Create a text file called marks. Save the text file in the project folder. Example of the content: Peter Sampson#40#50#40#30 Diane Wilson#78#89#66#55 James…Hi, can i please get assistance with the following Java class to read data below? Add anything relevant if needed only. The author and book classes is given if it is needed. As well as, the sample data file. public class Author { private String name; public Author (String name){ this.name= name; } public String toString(){ return name; } public boolean equals(Object obj){ return this.toString().equals(obj.toString()); } public int hashCode(){ return name.hashCode(); } } import java.util.*; public class Book { private String title;private double averageRating;private String ISBN;private int numPages;public Set<Author> authors;public Book(){authors=new HashSet<>(); //initialise authors}public Book(String title, double averageRating, String isbn, int numPages){this.title = title;this.averageRating = averageRating;this.ISBN = isbn;this.numPages = numPages;authors=new HashSet<>(); //initialise authors}//accessorspublic String getTitle(){return title;}public double…
- Create database of the student with the details such as (name, registernumber, cgpa, age, dayscholar/hosteller). Create a class student with the needed attributes. Use array of objects to store ‘n’ number of students’ details into the database. Write a java program to fetch the following details from the database. a. List of students whose joined in 2018. b. List of students whose age is between 18-20 c. List of students with CGPA less than 5. d. List of students who stay in hostel. e. List of 2019 batch students who are dayscholars.Write a java application that allows a user to input customer records (ID number, first & last name, and balance owed) and save each record to a file ALSO SHOW OUTPUTCreate a student record management system in java that allows users to manage a list of student names. The program should allow you to 1: add a student 2: delete student 3: search student 4: display all students should be able to store up to 100 students names and have a variable that can keep track of number of students. both variables must be global variables that are proceeded with static. use separate methods for each task(add, delete, search, display). use switch method for main menu options. use one class to display all 6 methods.
- For a java program: Design a database of books. Each book should have an author, title, and item code. Write a constructor, and methods to get each instance variable. Next, create a book database class that uses a HashMap to store book objects. The item code is to be used as the key. Finally, implement methods to insert a book and search for a book by item code in the database.Write a JAVA program that will maintain a phone directory using Classes, and Objects. The programshould be able to perform the following operations:1.Add persons details (first name, last name, phone number, city, address, sex and email) to the phonedirectory, where phone numbers in the directory have to be unique. (Note: each person record will store inClasses and Objects)2.Update telephone number by providing person first name.3.Display all details of persons from a phone directory.4.Search telephone number based on person first name. (Note: use sequential search to find all telephonesfor the given first name)Project OutputsThe output has to display a menu of choices. Then the user can select which operation want to perform.Also, you can use the method System.exit(0); to exit the program. The menu of choices will be:1) Add person details into the telephone book.2) Update a telephone number by providing person first name.3) Display the entire telephone book.4) Search a telephone…How do I check the case when the user enters an index that is negative, or lastindex > firstindex for the methods in java? code: import java.util.Scanner;public class Grades { public static int readGrades() { int grade=0; Scanner input = new Scanner(System.in); System.out.println("Enter a grade : "); grade=input.nextInt(); return count++; } public static int sum(int[] arr) { int grade_sum=0; for(int i=0;i<arr.length;i++) grade_sum=grade_sum+arr[i]; return grade_sum; } public static int sum(int[] arr, int firstIndex, int lastIndex) { int grade_sum=0; for(int i=firstIndex;i<=lastIndex;i++) grade_sum=grade_sum+arr[i]; return grade_sum; } public static double average(int[] arr) { double sum=sum(arr); return ((float)sum/(float)(arr.length)); } public static int maxValue(int[] arr) { int max=0; for(int i=0;i<arr.length;i++) {…