Some of this is correct but not all, having trouble with the return and year. Ec

Question

Some of this is correct but not all, having trouble with the return and year. Eclipse tells me that year is primative type and I can not call it like this. The program as a whole reads in a user input and then searches a list to find matches. If one exists it goes through the steps of matching author name and date to not have repeats.

* This method compares an instance of this Book, with another instance of
* Book. It should not consider genres.
* <P>
* Algorithm:<br>
* ????
* </P>
*
* @param obj
*            The object to which we are comparing this instance of Book
* @return ?????????
*/
public int compareTo(Book book) {
  // TODO Add the code for compareTo() here
  
  int result = title.compareTo(book.title);{
   if (result == 0);
    result = authorName.compareTo(book.authorName);
    return result;
   if (result == 0);
    result = year.compareTo(year);
    return result;
   }
   

// TODO Make sure you replace this return statement
  return;

Explanation / Answer

//Changes are in bold to comapre year

/**
* The book class that compars the two book
* objects by year.
* */
//Book.java
import java.lang.Comparable;
import java.util.Collections;
import java.util.ArrayList;
import java.util.Comparator;
public class Book implements Comparable<Book>
{
   public String title;
   public String author;
   public int year;

   public Book(String title, String author,int year) {
       this.title = title;
       this.author = author;
       this.year=year;
   }

   public String getTitle() {
       return this.title;
   }

   public String getAuthor() {
       return this.author;
   }
  
   public int getYear() {
       return this.year;
   }
  
//This code sinippet that compares the book by autor,title and year as well
   /**
   * The method compareTo that compares the book
   * by titlt,author and year
   * */
   public int compareTo(Book other)
   {
       int comparison = this.title.compareTo(other.title);
       if (comparison != 0)
       {
           return comparison;
       }

       comparison= this.author.compareTo(other.author);

       if(comparison!=0)
           return comparison;
       else
           //return 1 if year is same otherwise 0
           return this.year==other.year? 1:0;
   }

   //yearComparator that compares the year of Book objects
   public static final Comparator<Book> yearComparator = new Comparator<Book>()
           {
       public int compare(Book a, Book b)
       {
           //Convert the primitive type to wrapper class
           Integer inta=new Integer(a.year);
           Integer intb=new Integer(b.year);
           //then call compareTo method
           return inta.compareTo(intb);
       }
   };

}

//Answered as per your question

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