Additional Notes
When should you reach for `HashMap`?
Track: Java
Topic: Collections
Focus: Map Interface and HashMap
Java: Map Interface and HashMap
Answer
When repeated direct lookup by key is the main operation.
A map makes key-to-value lookup explicit in the model. If the code constantly looks up products by SKU or customers by email, `HashMap` usually communicates that workload better than scanning a list.
A map makes key-to-value lookup explicit in the model. If the code constantly looks up products by SKU or customers by email, `HashMap` usually communicates that workload better than scanning a list.
Topics: Collections Java Map Interface and HashMap