Java.

Write a method that prints out the details of all publications published in a given year. The output should be ordered on the category of the publications, and then on the title within each category. (Note: there are 3 categories: journals, books, and travel guidebooks.)

I have a Publication is a supper class of journals, books, and travel guidebooks. in my Publication, I have the getYear method and getTitle.

I have another class that has an array where all the Publication is a store.

public class Database {

private ArrayList publicationList;

public Database() { publicationList = new ArrayList(); }

public void addPublication(Publication newPublication) { if(newPublication != null){ publicationList.add(newPublication); } }

public void printYear(int enterYear) {

// code for sorting array goes here.

}

}

public class Publication { private String title; private int year; public Publication(String title, int newYear) { this.title = title; year = newYear; } public String getTitle() { return title; } public void print() { System.out.println("Name: " + title + "Address: " + year); } public int getYear() { return year; } public String toString() { return title + " Year: " + year; } }

public class TravelGuide extends Book { private String country; public TravelGuide(String title, String author, String publisher, int year, String country) { super(title,author,publisher, year); this.country = country; } public String getCountry() { return country; } public String toString () { return "Travel Guide " + super.toString() +" Country: " + country; } }

public class Book extends Publication {

private String author; private String publisher;

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

public String getAuthor() { return author; } public void print() { super.print(); System.out.println("Name: " + author); }

public String getPublisher() { return publisher; }

public String toString () { return "Book: " + super.toString() + " Author: " + author + " Publisher: " + publisher; } }

public class Journal extends Publication { private int month;

public Journal(String title, int month, int year) { super(title, year); this.month = month; }

public int getMonth() { return month; }

public String toString() { return "Journal: " + super.toString() + " Month: " + getMonthName(month); }