15.3.2.1 - HashSet
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Practice Questions
Test your understanding with targeted questions
What is the primary purpose of a HashSet in Java?
💡 Hint: Think about how sets work in mathematics.
Name one method used to add an element to a HashSet.
💡 Hint: Consider the name of the method that suggests adding items.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is the primary characteristic of a HashSet?
💡 Hint: Think about how a typical set behaves.
True or False: The order of elements in a HashSet is guaranteed.
💡 Hint: Recall what unordered means.
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Challenge Problems
Push your limits with advanced challenges
You are tasked with creating a contact manager that should not allow duplicate contacts. How would you utilize HashSet in your solution? Write a sample code snippet demonstrating how you would add and check contact names.
💡 Hint: Consider how you would check for duplicates before adding.
Explain how you'd handle equality in HashSet's elements to prevent collisions effectively. What key methods must be overridden?
💡 Hint: Think about the rules for comparison in programming.
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