Additional Notes
What if you only override equals without hashCode?
Track: Java
Topic: Core Java
Focus: equals and hashCode in Collections
Java: equals and hashCode in Collections
Answer
It may lead to duplicate entries or retrieval failures.
Overriding equals without hashCode can break contract rules, causing collections like HashSet to fail in distinguishing duplicates or retrieving elements. For example, two equal objects might reside in different buckets, leading to duplicate elements.
Overriding equals without hashCode can break contract rules, causing collections like HashSet to fail in distinguishing duplicates or retrieving elements. For example, two equal objects might reside in different buckets, leading to duplicate elements.
Topics: Core Java equals and hashCode in Collections Java