import java.util.ArrayList;
import java.util.HashMap;
import java.util.Scanner;
public class BookAuthor {

    public static void main(String[] args) {
        ArrayList<HashMap<String, String>> book = new ArrayList<>();//讓HashMap有序的排列在Arraylist中

        /*
            請同學補上缺少的程式碼
        */

        for (int n=0;n<book.size();n++) {
           HashMap<String, String> oneBook = book.get(n);//取出存放在Arraylist book中的HashMap資料
            System.out.println("Book: " + oneBook.get("book"));
            System.out.println("Author: " + oneBook.get("author"));
            System.out.println();
        }
    }
}