Question

FOR JAVA:

Summary: Create a program that stores info on textbooks.

• The solution should be named TextBookSort.java.
• Include these steps:
  • Create a class titled TextBook that contains fields for the author, title, page count, ISBN, and price.
  • This TextBook class will also provide setter and getter methods for all fields. Save this class in a file titled TextBook.java.
  • Create a class titled TextBookSort with an array that holds 5 instances of the TextBook class, filled without prompting the user for input.
  • Next prompt the used to enter a field for sorting ( that is.... do they want to sort by ISBN? author name? etc.), sort the array of objects based on the user input, and then display the newly sorted array of objects.
  • Save this class in a file titled TextBookSort.java.
• Run your program until it works and the output looks nice.

Answer 1

TextBook.java:

public class TextBook {
   private String author;
   private String title;
   private int pagecount;
   private String ISBN;
   private double price;
   //getters and setters
   public String getAuthor() {
       return author;
   }
   public void setAuthor(String author) {
       this.author = author;
   }
   public String getTitle() {
       return title;
   }
   public void setTitle(String title) {
       this.title = title;
   }
   public int getPagecount() {
       return pagecount;
   }
   public void setPagecount(int pagecount) {
       this.pagecount = pagecount;
   }
   public String getISBN() {
       return ISBN;
   }
   public void setISBN(String iSBN) {
       ISBN = iSBN;
   }
   public double getPrice() {
       return price;
   }
   public void setPrice(double price) {
       this.price = price;
   }
   //constructor
   public TextBook(String author, String title, int pagecount, String iSBN,
           double price) {
       super();
       this.author = author;
       this.title = title;
       this.pagecount = pagecount;
       ISBN = iSBN;
       this.price = price;
   }
   //toString() method to print the object values
   @Override
   public String toString() {
       return "Author: " + author + "\nTitle: " + title
               + "\nPagecount: " + pagecount + "\nISBN: " + ISBN + "\nPrice: "
               + price+"\n" ;
   }   

}

TextBookSort.java

import java.util.*;
public class TextBookSort {
   public static void main(String[] args)
   {

//Scanner ocject to read input
       Scanner input=new Scanner(System.in);
      
       TextBook[] bookList=new TextBook[5];

//adding books to bookList array
       bookList[0]=new TextBook("abc","hello world",123,"ABc123",123.4);
       bookList[1]=new TextBook("bcd","abdfd",90,"hfhBcqw23",121);
       bookList[2]=new TextBook("def","ekrejk",13,"dgd123",909);
       bookList[3]=new TextBook("kmo","wewe",993,"sdsi3",3434);
       bookList[4]=new TextBook("zui","grgr",1003,"eyuwew23",1201);
       System.out.println("Select field to sort Array \n1.sort by Title\n2.sort by ISBN\n3.sort by Price\n4.sort by Page count\n5.sort by Author");
       int choice=input.nextInt(); //taking user choice
       if(choice==1)
       {
           //lamba expression to sort array based on title of the book
           Arrays.sort(bookList, (tb1, tb2) -> tb1.getTitle().compareTo(tb2.getTitle()));
       }
       else if(choice==2)
       {
           //lamba expression to sort array based on ISBN of the book
           Arrays.sort(bookList, (tb1, tb2) -> tb1.getISBN().compareTo(tb2.getISBN()));
       }
       else if(choice==3)
       {
           //lamba expression to sort array based on Price of the book
           Arrays.sort(bookList, (tb1, tb2) -> Double.compare(tb1.getPrice(), tb2.getPrice()));
       }
       else if(choice==4)
       {
           //lamba expression to sort array based on Pagecount of the book
           Arrays.sort(bookList, (tb1, tb2) -> tb1.getPagecount()-tb2.getPagecount());
       }
       else if(choice==5)
       {
           //lamba expression to sort array based on Author of the book
           Arrays.sort(bookList, (tb1, tb2) -> tb1.getAuthor().compareTo(tb2.getAuthor()));
       }
       else//If invalid choice is entered
       {
           System.out.println("Invalid Choice Found!");
       }
       System.out.println("Array after sorting");
       for(int i=0;i<5;i++) //Printing the array of objects after sorting
       {
           System.out.println(bookList[i]);

       }
          
              
   }

}

OUTPUT:

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