15.3.2.3. TreeSet

Try these first

1. 1.

   What does a TreeSet in Java guarantee about its elements?

   Hint

   Think about how we organize things.

2. 2.

   Which method would you use to add an element to a TreeSet?

   Hint

   Just like adding a book to a shelf.

3. 3.

   What is the main characteristic of TreeSet?

   • It allows duplicates
   • It maintains sorted order
   • It uses hash table

   Hint

   Consider how elements are arranged.

4. 4.

   True or False: A TreeSet can contain null elements.

   • True
   • False

   Hint

   Think about allowing an exception.

5. 5.

   Create a TreeSet of your favorite movies. Ensure the movie titles are sorted alphabetically, and no duplicates are recorded. Demonstrate the functionality of adding and removing elements from the TreeSet.

   Hint

   Consider how you would organize movies on display.

6. 6.

   Implement a custom comparator that sorts a TreeSet of integers in reverse order, and demonstrate how to add elements and retrieve the smallest and largest numbers.

   Hint

   Think about how numbers can be arranged contrary to natural order.