Additional Notes
Explain how HashSet handles null values?
Track: Java
Topic: Collections
Focus: Set Interface and HashSet
Java: Set Interface and HashSet
Answer
HashSet allows one null element and treats it as unique.
HashSet can contain a single null value because it treats null as a unique object. This is useful in cases where 'unknown' items are temporarily represented as null in a catalog.
HashSet can contain a single null value because it treats null as a unique object. This is useful in cases where 'unknown' items are temporarily represented as null in a catalog.
Topics: Collections Java Set Interface and HashSet