Question

Additional info is this will use a total of four classes Book, BookApp, TextBook, and TextBookApp.

Also uses Super in the TextBook Class section.

Problem 1 (10 points) Вook The left side diagram is a UML diagram for Book class. - title: String The class has two attributes, title and price, and get/set methods for the two attributes. - price: double Вook) Book(String, double) getTitle(): String setTitle(String): void + getPrice() double setPrice(double): void toString() String + The first constructor doesn't have a parameter. It assigns "" to title and 0.0 to price; + The second constructor uses passed-in parameters to initialize the two attributes The toString() method returns values for the two attributes. + Notation: - means private, and + means public. Questions: 1) Define the Book.java class according to the above diagram and description 2) Then define another class named BookApp.java which has a main() method. This BookApp class interacts with the Book class as follows: 2.1) you create a Book object, named b1, by calling the first Book constructor. Then using the object b1 to call setTitle() and setPrice () methods to assign "John Doe" to title and 8.5 to price. Finally, using b1 to call toString() method and print the returned value from the toString() method 2.2) You create another Book object, named b2, by calling the second Book constructor and passing "Ann Smith" as the first argument and 9.7 as the second argument 2.3) Finally, using b2 to call toString() method and print the returned value from the toString() method 2.4) Run the BookApp program to make sure it works correctly Problem 2 (15 points) Reuse the Book.java as a parent class, refer to the following requirements and UML diagram, The first constructor, TextBook(), doesn't have a parameter. It assigns "" to title, 0.0 to price, 0 to courselD; The second constructor, TextBook(String, double, int) uses three passed-in parameters to initialize the three attributes toString( in TextBook returns a string value for the three attributes, title, price, and courselD. Book Questions: - title: String 1) Define a child class, TextBook, based on above requirement - price: double Book() Book(String, double) getTitle(): String and the diagram + 2) Define another class, TextBookApp. This TextBookApp class + + interacts with the Book and TextBook classes as follows: setTitle(String): void getPrice(): double setPrice(double): void toString(): String 2.1) Create a Book object, named b, by calling the second Book + constructor and passing "Ann Smith" as the first argument and + 9.7 as the second argument. Use b to call toString() method and print the returned value from the toString() method. 2.2) Create a TextBook object, named tb1, by calling the first TextBook TextBook constructor. Then using the object tb1 to call methods - courselD: int TextBook( TextBook(String, double, int) to assign "John Doe" to title, 8.5 to price, and 2050 to courselD. Finally, using tb1 to call toString() method and print out the getCourselD): int setCourselD(int): void toString(): String + returned value. + 2.3) Create another TextBook object, named tb2, by calling the second TextBook constructor and passing "Ann Smith" as the first argument, 9.7 as the second argument, and 3090 as the third parameter. Use tb2 to call toString() method and print out the returned value. 2.4) Run TextBookApp to make sure it works correctly

Answer 1

Here I am providing the answers for above questions:

Problem 1:

class Book
{
String title;
double price;
public Book() //first constructor(default consructor)
{
this.title="";
this.price=0.0;
}
public Book(String title,double price) //second constructor with parameters
{
this.title=title;
this.price=price;
}
public String getTitle() //getTitle method to return the title
{
return this.title;
}
public void setTitle(String title) //setTitle method to assign the title
{
this.title=title;
}
public double getPrice() //getPrice method to return the price
{
return this.price;
}
public void setPrice(double price) //setTitle mehtod to assign the price
{
this.price=price;
}
public String toString() //toString method to print details
{
return "\nTitle:"+this.title+"\nPrice:"+this.price;
}
}
public class BookApp
{
public static void main(String args[])
{
Book b1=new Book(); //creating the first object b1 by calling default constructor
b1.setTitle("John Doe");
b1.setPrice(8.5);
System.out.println(b1.toString()); //calling toString method to print details of book1
  
Book b2=new Book("Ann Smith",9.7); //creating the second object b2 by calling parameter constructor.
System.out.println(b2.toString()); //calling toString method to print details of book2
  
}
}

Output:

Title: John Doe Price 8.5 Title:Ann Smith Price 9.7

Problem 2:

class TextBook extends Book //TextBook class extending the Book Class
{
int courseID;
public TextBook() //first constructor(default consructor)
{
super("",0.0);
this.courseID=0;
}
public TextBook(String title,double price,int courseID) //second constructor with parameters
{
super(title,price);
this.courseID=courseID;
}
public int getCourseID() //getCourseID method to return the courseID
{
return this.courseID;
}
public void setCourseID(int courseID) //setCourseID method to assign the courseID
{
this.courseID=courseID;
}
public String toString() //toString method to print details
{
return super.toString()+"\nCourseID:"+this.courseID;
}
}

public class TextBookApp
{
public static void main(String args[])
{
Book b=new Book("Ann Smith",9.7); //creating the book object b by calling parameter constructor
System.out.println(b.toString()); //printing the details by calling toString method.
  
TextBook tb1=new TextBook(); //creating the first object tb1 by calling default constructor
tb1.setTitle("John Doe");
tb1.setPrice(8.5);
tb1.setCourseID(2050);
System.out.println(tb1.toString()); //printing the details
  
TextBook tb2=new TextBook("Ann Smith",9.7,3090); //creating the second object t2 by calling parameter constructor.
System.out.println(tb2.toString()); //printing the details
  
}
}

Output:

Title Ann Smith Price 9.7 Title John Doe Price 8.5 CourseID: 2050 Title Ann Smith Price: 9.7 CourseID: 3090

Hoping that the above answers will help you...Thank you...