Additional Notes
Operations to Replace Values in a HashMap?
Track: Java
Topic: Collections
Focus: Map Interface and HashMap
Java: Map Interface and HashMap
Answer
put() replaces the value if the key exists.
When you use the put() method with a key that already exists in a HashMap, the old value is replaced with the new one. For example, if a product's price changes, you can update it by using the put() method with the product ID as the key.
When you use the put() method with a key that already exists in a HashMap, the old value is replaced with the new one. For example, if a product's price changes, you can update it by using the put() method with the product ID as the key.
Topics: Collections Java Map Interface and HashMap