Java tutorial for beginners ☕ - Learn Java AGGREGATION in 9 minutes! 🏫

#java #javatutorial #javacourse public class Main { public static void main(String[] args) { // Aggregation = Represents a "has-a" relationship between objects. // One object contains another object as part of its structure, // but the contained object/s can exist independently. Book book1 = new Book("The Fellow of the Ring", 423); Book book2 = new Book("The Two Towers", 352); Book book3 = new Book("The Return of the King", 416); Book[] books = {book1, book2, book3}; Library library = new Library("NYC Public Library", 1897, books); library.displayInfo(); } } public class Book { String title; int pages; Book(String title, int pages){ this.title = title; this.pages = pages; } String displayInfo(){ return this.title + " (" + this.pages + " pages)"; } } public class Library { String name; int year; Book[] books; Library(String name, int year, Book[] books){ this.name = name; this.year = year; this.books = books; } void displayInfo() { System.out.println("The " + this.year + " " + this.name); System.out.println("Books Available:"); for (Book book : books) { System.out.println(book.displayInfo()); } } }