Question

What does the following code do?

ArrayList> data = new ArrayList>();
for (Books book : books) {
HashMap map = new HashMap();
("title", book.getTitle());
("author", book.getAuthor());
("price", book.getPrice());
(map);
}

Answer 1

The code snippet creates an ArrayList of Hashmaps, where each map represents a book with its title, author, and price. It iterates over a collection of books and stores their properties into the list.

Step-by-step explanation:

The provided code snippet appears to be in Java, and it is used for creating a list of maps that represent book objects. Here's what each part of the code does:

ArrayList> data = new ArrayList>(); - Initializes a new ArrayList called 'data' that will store HashMaps.

for (Books book : books) { - This is a for-each loop that iterates over a collection of 'book' objects.

HashMap<String, Object> map = new HashMap<String, Object>(); - Creates a new HashMap to store the properties of a 'book'.

map.put("title", book.getTitle()); - Stores the title of the 'book' in the map.

map.put("author", book.getAuthor()); - Stores the author of the 'book' in the map.

map.put("price", book.getPrice()); - Stores the price of the 'book' in the map.

data.add(map); - Adds the map containing the book's information to the 'data' list.

Each 'book' is represented by a map with keys 'title', 'author', and 'price' which are associated with the appropriate values from the 'book' object.