Java Method Put In Hashmap - Latest Information & Updates 2026

Web Reference: Jul 11, 2025 · The put () method of the Java HashMap class is used to add or update the key-value pairs in the map. If the key already exists in the map, the previous value associated with the key is replaced by the new value and If the key does not exist, the new key-value pair is added to the map. Definition and Usage The put() method writes an entry into the map. If an entry with the same key already exists then the value of that entry will be changed. The HashMap.put() method in Java is used to insert key-value pairs into a HashMap. This guide will cover the method's usage, explain how it works, and provide examples to demonstrate its functionality.

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HashMap Methods in Java | get | put | remove | clear | size | containsKey

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