Design a console program that will print details of prescribed textbooks of students. Make use of an abstract class Book with variables that will store the author, title, category and price of a book. Create a constructor that accepts the author, title and category through parameters and assign these to the class variables. Create an abstract set method for the price of a book; also create get methods for the variables. Create a subclass TextBook that extends the Book class and implements an iPrintable interface. The interface that must be added is shown below: public interface iPrintable { String DisplayDetails(); The TextBook subclass has a private variable named yearPrescribed for which a get method must be written. The constructor of the TextBook class must accept the author, title, category and yearPrescribed through parameters. Write the code for the setPrice() and DisplayDetails() methods.
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Book.java
public abstract class Book
{
public String author,title,category,price;
//constructor
public Book(String author,String title,String category)
{
this.author=author;
this.title=title;
this.category=category;
}
//setprice abstrac method
public abstract void setPrice(String price);
//get methods for all other variables
public String getAuthor() {
return this.author;
}
public String getTtile() {
return this.title;
}
public String getCategory() {
return this.category;
}
}
iPrintable.java
public interface iPrintable {
String DisplayDetails();
}
TextBool.java
public class TextBook extends Book implements iPrintable{
private String yearPrescribed;//instance varibale
//counstructor
public TextBook(String author, String title, String category,String year) {
super(author, title, category);
this.yearPrescribed=year;
}
//get yearPrescribed method
String getYearPrescribed()
{
return this.yearPrescribed;
}
@Override
public void setPrice(String price) {
this.price=price;
//throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
@Override
public String DisplayDetails() {
String str="Author:"+getAuthor()+"\nTitel:"+getTtile()+"\nCategory:"+getCategory()+"\nYear Prescribed:"+getYearPrescribed()+"\nPrice:"+this.price;
return str;
}
}useBook.java
public class useBook {
public static void main(String[] args) {
TextBook book1=new TextBook("N.O.Body", "Intro to programming", "Non-fiction", "DISD1");
book1.setPrice("R350");
TextBook book2=new TextBook("S.O.Mebody","Web Development Intermediate","Non-fiction", "DISD2");
book2.setPrice("R350");
System.out.println("Book Details");
System.out.println(book1.DisplayDetails());
System.out.println("\n\n");
System.out.println(book2.DisplayDetails());
}
}
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