How can I make my class iterable so I can use foreach syntax?

Question

I have Book and BookList classes. BookList is something like this:

public class BookList 
{
    private final List<         


        

Answer 1

You need to implement the Iterable interface, which means you need to implement the iterator() method. In your case, this might look something like this:

public class BookList implements Iterable {
    private final List bList = new ArrayList();

    @Override
    public Iterator iterator() {
        return bList.iterator();
    }

    ...
}