45 lines
1.8 KiB
Java
45 lines
1.8 KiB
Java
package aula10.ex2;
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import aula10.ex1.Book;
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import java.util.HashMap;
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import java.util.LinkedList;
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public class BooksTest {
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static HashMap<String, LinkedList<Book>> books = new HashMap<>() {
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@Override
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public String toString() {
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StringBuilder sb = new StringBuilder();
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for (String genre : this.keySet()) {
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sb.append(genre).append(":");
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for (Book book : this.get(genre)) {
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sb.append("\n\t").append(book);
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}
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sb.append("\n");
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}
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return sb.toString();
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}
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};
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public static void main(String[] args) {
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books.put("Fantasia", new LinkedList<>());
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books.put("Ficção Científica", new LinkedList<>());
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books.put("Romance", new LinkedList<>());
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books.put("Terror", new LinkedList<>());
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books.get("Fantasia").add(new Book("Harry Potter", "J. K. Rowling", 1997));
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books.get("Ficção Científica").add(new Book("The Martian", "Andy Weir", 2011));
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books.get("Romance").add(new Book("Pride and Prejudice", "Jane Austen", 1813));
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books.get("Terror").add(new Book("The Shining", "Stephen King", 1977));
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books.get("Fantasia").add(new Book("The Hobbit", "J. R. R. Tolkien", 1937));
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books.get("Ficção Científica").add(new Book("The Hitchhiker's Guide to the Galaxy", "Douglas Adams", 1979));
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books.get("Romance").add(new Book("Jane Eyre", "Charlotte Brontë", 1847));
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books.get("Terror").add(new Book("Frankenstein", "Mary Shelley", 1818));
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System.out.println(books);
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System.out.print(selectRandomBook("Fantasia"));
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}
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public static Book selectRandomBook(String genre) {
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return books.get(genre).get((int) (Math.random() * books.get(genre).size()));
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}
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}
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