15.3.2.2. LinkedHashSet

Try these first

1. 1.

   What is a LinkedHashSet?

   Hint

   Think of how it differs from a HashSet.

2. 2.

   How do you create a LinkedHashSet in Java?

   Hint

   Look for the class name in the Java documentation.

3. 3.

   What does a LinkedHashSet maintain that a HashSet does not?

   • Speed
   • Insertion Order
   • Duplicates

   Hint

   Think about how elements are accessed in different structures.

4. 4.

   True or False: A LinkedHashSet allows duplicate elements.

   • True
   • False

   Hint

   Reflect on the definition of a Set.

5. 5.

   Design a simple Java program that uses a LinkedHashSet to store the names of students as they enroll in a class. Ensure that the order of enrollment is preserved and no duplicates are added.

   Hint

   Think of a method to ensure names are unique during input.

6. 6.

   Implement a scenario where you have to retrieve and print students in the order they were added, including a feature to ignore duplicate entries.

   Hint

   Utilize an enhanced for-loop for retrieving elements efficiently.