Difference between Hashset and Treeset in Java - Testbook

Understanding Hashset and Treeset in Java

A Hashset is an implementation of the set interface supported by a hashmap, whereas a Treeset implements sorted sets and is backed by a TreeMap.

Exploring the Differences between Hashset and Treeset in Java

S. No.	Hash Set	Tree Set
1	Hash set operates using a HashTable.	Tree set operates using a tree structure.
2	It does not permit heterogeneous objects.	It permits heterogeneous objects.
3	It allows null objects.	It does not allow null objects.
4	Objects are compared using the equals method.	Objects are compared using the compare method.
5	It does not support ordering.	TreeSet supports objects in sorted order.

Continue learning and stay connected to get the latest updates on GATE Exam along with GATE Eligibility Criteria, GATE 2023, GATE Admit Card, GATE Application Form, GATE Syllabus, GATE Cut off, GATE Previous Year Question Paper, and more.

Further Reading,

Difference between Abstract Class and Interface in Java
Difference between Abstraction and Encapsulation in Java
Difference between Aggregation and Composition in Java
Difference between == and .equals() method in Java
Difference between Primitive and Object Data Types in Java
Difference between Stack and Heap Memory in Java
Difference between Throw and Throws in Java

Frequently Asked Questions

What is the difference between Hashset and Treeset in Java?

The main differences are that Hashset is implemented with a HashTable, does not authorize heterogeneous objects, permits null objects, uses the equals method for object comparison, and does not support any order. On the other hand, Treeset is implemented with a tree structure, authorizes heterogeneous objects, does not permit null objects, uses the compare method for object comparison, and supports objects in a sorted order.