Android How to Program, 3/e

Answers to Self-Review Exercises

1. J.1

   1. Iterator.

   2. index.

   3. autoboxing.

   4. ArrayList, Vector.

   5. auto-unboxing.

   6. shutdown.

   7. synchronized.

2. J.2

   1. False. Autoboxing occurs when adding a primitive type to a collection, which means the primitive type is converted to its corresponding type-wrapper class.

   2. False. A Set cannot contain duplicate values.

   3. False. A Map cannot contain duplicate keys.

   4. True.

   5. False.

   6. Collections is a class; Collection is an interface.

   7. True.

   8. True.

   9. False. Text files are human readable in a text editor. Binary files might be human readable, but only if the bytes in the file represent ASCII characters.

   10. True.