Additional Notes
Impact of Mutable Keys in HashMap?
Track: Java
Topic: Collections
Focus: Map Interface and HashMap
Java: Map Interface and HashMap
Answer
Modifying a key after insertion can cause issues.
If a key is modified after being inserted into a HashMap, it can disrupt the map's ability to retrieve the value, leading to unexpected behavior. For example, if you use a mutable object like a custom class as a key and change its fields, the hashCode may change, affecting retrieval.
If a key is modified after being inserted into a HashMap, it can disrupt the map's ability to retrieve the value, leading to unexpected behavior. For example, if you use a mutable object like a custom class as a key and change its fields, the hashCode may change, affecting retrieval.
Topics: Collections Java Map Interface and HashMap