Difference between HashSet and TreeSet in Java

Difference between HashSet and TreeSet in Java

Distinguish, differentiate, compare and explain what is the difference between HashSet and TreeSet in Java. Comparison and Differences.

Difference between HashSet and TreeSet in Java

1. In terms of ordering or sorting: HashSet doesnt provide any ordering guarantee, whereas TreeSet provides ordering /sorting guarantee.

2. In terms of null element: HashSet allows one null element while TreeSet doesnt allows null objects.

3. In terms of complementation: HashSet is internally implemented using Hash Map while TreeSet is internally implemented using TreeMap.

4. In terms of comparison and duplicate detection: HashSet uses equals() method for comparison. TreeSet uses compareTo() method for comparison.

5. In terms of underlying data structure: HashSet is backed by hash table, whereas TreeSet is backed by Red-Black Tree.

6. In terms of performance: HashSet is faster while TreeSet is slower for most of the general purpose operation e.g. add, remove and search.

Search More Topics on the Web


Difference between TreeSet in Java vs HashSet

HashSet vs TreeSet in Java

Differences between TreeSet in Java vs HashSet

Why and How

Spreading Knowledge Across the World

USA - United States of America  Canada  United Kingdom  Australia  New Zealand  South America  Brazil  Portugal  Netherland  South Africa  Ethiopia  Zambia  Singapore  Malaysia  India  China  UAE - Saudi Arabia  Qatar  Oman  Kuwait  Bahrain  Dubai  Israil  England  Scotland  Norway  Ireland  Denmark  France  Spain  Poland  and  many more....