Common HashMap Methods Explained

Commonly used methods in HashMap include:

1. Store the specified key-value pair in the HashMap.
2. Retrieve the corresponding value based on the key.
3. remove(key): Remove the key-value pair corresponding to the key.
4. containsKey(key): Determine if the specified key is contained in the HashMap.
5. containsValue(value): checks if the specified value is contained in the HashMap.
6. keySet() method: returns a set of all keys in the HashMap.
7. values(): collection of all values in the HashMap.
8. entrySet(): returns a collection of all key-value pairs in the HashMap.
9. size(): Returns the number of key-value pairs in the HashMap.
10. clear(): Remove all key-value pairs from the HashMap.