Question

please use java

1. Modify the Student class presented to you as follows. Each student object should also contain the scores for three tests. Provide a constructor that sets all instance values based on parameter values. Overload the constructor such that each test score is assumed to be initially zero. Provide a method called set Test Score that accepts two parameters: the test number (1 through 3) and the score. Also provide a method called get Test Score that accepts the test number and returns the appropriate score. Provide a method called average that computes and returns the average test score for this student. Modify the toString method such that the test scores and average are included in the description of the student. Modify the driver class main method to exercise the new Student methods. 2. Write a class called Course that represents a course taken at a school. Represent each student using the modified Student class from the previous question. Use an ArrayList in the Course to store the students taking that course. The constructor of the Course class should accept only the name of the course. Provide a method called addStudent that accepts one Student parameter. Provide a method called average that computes and returns the average of all students test score averages. Provide a method called roll that prints all students in the course. Create a driver class with a main method that creates a course, adds several students, prints a roll, and prints the overall course test average. 3. Design and implement a set of classes that define various types of reading material: books, novels, magazines, technical journals, textbooks, and so on. Include data values that describe various attributes of the material, such as the number of pages and the names of the primary characters. Include methods that are named appropriately for each class and that print an appropriate message. Create a main driver class to instantiate and exercise several of the classes. 4. Modify the Firm example from week4 lecture such that all employees can be given different vacation options depending on their classification. Provide a method called vacation that returns the number of vacation days a person has. Give all employees a standard number of vacation days (14), then override the method in the various employee classes as appropriate. Modify the driver program to demonstrate this new functionality.

do what u can

Answer 1

Answer 1:

Student.java

public class Student {

   private int testOneScore;
   private int testTwoScore;
   private int testThreeScore;

   public Student(int testOneScore, int testTwoScore, int testThreeScore) {
       super();
       this.testOneScore = testOneScore;
       this.testTwoScore = testTwoScore;
       this.testThreeScore = testThreeScore;
   }

   public Student() {
       this.testOneScore = 0;
       this.testTwoScore = 0;
       this.testThreeScore = 0;
   }

   public void setTestScore(int testNumber, int score) {
       if (testNumber == 1) {
           this.testOneScore = score;
       } else if (testNumber == 2) {
           this.testTwoScore = score;
       } else {
           this.testThreeScore = score;
       }
   }

   public int getTestScore(int testNumber) {
       if (testNumber == 1) {
           return this.testOneScore;
       } else if (testNumber == 2) {
           return this.testTwoScore;
       }
       return this.testThreeScore;
   }

   public int average() {
       return (this.testOneScore + this.testTwoScore + this.testThreeScore) / 3;
   }

   @Override
   public String toString() {
       return "Test One Score: " + this.testOneScore + " Test Two Score: " + this.testTwoScore + " Test Three Score: "
               + this.testThreeScore + " Avarage: " + average();
   }

}
Driver class StudentApp.java

public class StudentApp {

   public static void main(String[] args) {
       Student student1 = new Student(30, 35, 40);
      
       System.out.println("-------------Student1-----------");
       System.out.println("Test Score 2: "+student1.getTestScore(2));
       System.out.println("Average is: "+student1.average());
       System.out.println(student1);
      
       Student student2 = new Student();
       student2.setTestScore(1, 10);
       student2.setTestScore(2, 30);
       student2.setTestScore(3, 32);
      
       System.out.println("-------------Student2-----------");
       System.out.println("Test Score 3: "+student2.getTestScore(3));
       System.out.println("Average is: "+student2.average());
       System.out.println(student2);
      
   }
}

Output

Answer 2:

Course.java

import java.util.ArrayList;
import java.util.List;

public class Course {

   private List<Student> students = new ArrayList<>();
   private String courseName;

   public Course(String courseName) {
       super();
       this.courseName = courseName;
   }

   public void addStudent(Student student) {
       this.students.add(student);
   }

   public int average() {
       int total = 0;
       for (Student student : this.students) {
           total += student.average();
       }
       return total / this.students.size();
   }

   public void roll() {
       for (Student student : this.students) {
           System.out.println(student);
       }
   }
}
Driver class CourseApp.java

package com.abc;

public class CourseApp {

   public static void main(String[] args) {
       Course course = new Course("Data Science");

       Student student1 = new Student(20, 30, 40);
       Student student2 = new Student(26, 22, 29);
       Student student3 = new Student(19, 45, 46);
       Student student4 = new Student(34, 33, 41);
       Student student5 = new Student(39, 41, 36);

       course.addStudent(student1);
       course.addStudent(student2);
       course.addStudent(student3);
       course.addStudent(student4);
       course.addStudent(student5);

       course.roll();
       System.out.println("All student average is: " + course.average());
   }
}

Output:

Answer 3:

I have created 4 classes Book.java, Novel.java , BookApp.java and NovelApp.java.

Book.java

import java.util.Date;

public class Book {

   private String bookName;
   private String ISBNNumber;
   private String author;
   private double price;
   private int totalPages;
   private Date publishedDate;

   public Book(String bookName, String ISBNNumber, String author, double price, int totalPages, Date publishedDate) {
       super();
       this.bookName = bookName;
       this.ISBNNumber = ISBNNumber;
       this.author = author;
       this.price = price;
       this.totalPages = totalPages;
       this.publishedDate = publishedDate;
   }

   public double getPrice() {
       return price;
   }

   public void setPrice(double price) {
       this.price = price;
   }

   public String getBookName() {
       return bookName;
   }

   public String getISBNNumber() {
       return ISBNNumber;
   }

   public String getAuthor() {
       return author;
   }

   public int getTotalPages() {
       return totalPages;
   }

   public Date getPublishedDate() {
       return publishedDate;
   }

   @Override
   public String toString() {
       return "Book [bookName=" + bookName + ", ISBNNumber=" + ISBNNumber + ", author=" + author + ", price=" + price
               + ", totalPages=" + totalPages + ", publishedDate=" + publishedDate + "]";
   }

}
BookApp.java

import java.util.Date;

public class BookApp {

   public static void main(String[] args) {
       Book myBook = new Book("Effective Java", "98-345-678-123", "Joshua Bloch", 10.00, 412, new Date());
      
       myBook.setPrice(25.00);
       System.out.println("Book name is: "+myBook.getBookName());
       System.out.println("Book author is: "+myBook.getAuthor());
       System.out.println("Book price is: "+myBook.getPrice());
       System.out.println("ISBN is: "+myBook.getISBNNumber());
       System.out.println("Total pages are: "+myBook.getTotalPages());
      
       System.out.println(myBook);
   }
}

Output

Novel.java

import java.util.ArrayList;
import java.util.List;

public class Novel {

   private String novelName;
   private String novelCategory;
   private String author;
   private double price;
   private int totalPages;
   private List<String> mainCharacters = new ArrayList<>();

   public Novel(String novelName, String novelCategory, String author, int totalPages) {
       super();
       this.novelName = novelName;
       this.novelCategory = novelCategory;
       this.author = author;
       this.totalPages = totalPages;
   }

   public double getPrice() {
       return price;
   }

   public void setPrice(double price) {
       this.price = price;
   }

   public String getNovelName() {
       return novelName;
   }

   public String getNovelCategory() {
       return novelCategory;
   }

   public int getTotalPages() {
       return totalPages;
   }

   public void addMainCharacter(String characterName) {
       this.mainCharacters.add(characterName);
   }

   public List<String> getMainCharacters() {
       return this.mainCharacters;
   }

   public String getAuthor() {
       return author;
   }

   @Override
   public String toString() {
       return "Novel [novelName=" + novelName + ", novelCategory=" + novelCategory + ", author=" + author + ", price="
               + price + ", totalPages=" + totalPages + ", mainCharacters=" + mainCharacters + "]";
   }

}
NovelApp.java

public class NovelApp {

   public static void main(String[] args) {
       Novel novel = new Novel("Catch-22", "Absurdist fiction", "Joseph Heller", 453);
       novel.addMainCharacter("Yossarian");
       novel.addMainCharacter("Scheisskopf");
       novel.addMainCharacter("Colonel Cathcart");
      
       novel.setPrice(10.00);
      
       System.out.println("Novel name is: "+novel.getNovelName());
       System.out.println("Novel author is: "+novel.getAuthor());
       System.out.println("Novel price is: "+novel.getPrice());
       System.out.println(novel);
      
   }
}
Output

Answer 4:

Question is not quite clear to me as lot of details are missing like Executive class I'm not able to figure out the exact data members from the data. Hence my answer is based on the assumption.

Assuming Executive class has the field for classification as follows:

public class Executive {

   private String classification;
   private String vacationOptionOne;
   private String vacationOptionTwo;
   private String vacationOptionThree;
   private int vacationDays = 14;

   public String getVacationOption(String classification) {
       if (classification.equals("class1")) {
           return vacationOptionOne;
       } else if (classification.equals("class2")) {
           return vacationOptionTwo;
       }
       return vacationOptionThree;
   }

   public int vacation() {
       return vacationDays;
   }
  
   public void setVacationDays(int vacationDays) {
       this.vacationDays = vacationDays;
   }

}
you can also initialize vacationDyas into a constructor. Due to unavailability of information I have not provided the driver class for this. The getVacationOption(String classification) method will return the vacation option based on the classification.

Please mention your doubts in the comment will be happy to clarify it.