Mastering Java: The Ultimate Quiz for 'Thinking in Java'

What approach does Fill2.java take to avoid the requirement of a Collection?

1. Using direct method calls

2. Creating an interface with default methods

3. Creating adapters to fulfill an interface

4. Using static methods only

The correct answer is: Creating adapters to fulfill an interface

The other options are incorrect because - Option A is incorrect because direct method calls still require a certain structure for the collection and can't always account for all possibilities. - Option B is incorrect because an interface with default methods still requires objects to be part of collections. - Option D is incorrect because static methods can't be instantiated, limiting their usefulness in working with collections. Option C is a viable approach because an adapter can take a given data structure, such as an array, and adapt it to fulfill the requirements of an interface. This allows the use of existing data structures without having to create new collection objects, thus avoiding the requirement of a specific collection.