Is HashMap a Collection class?

The correct answer to this question is True. In Java, HashMap is a collection class that is map-based. It is used for storing value pairs and strong keys. This collection is denoted as HashMap.

It can also be denoted as HashMap. HashMap includes a number of methods. One is the boolean containsKey(Object key). This method is a boolean function, and it can return either true or false.

The return depends on the key that is specified in the map. Another HashMap method is boolean isEmpty(), which sees if the map is empty or not. If it is empty, the return will be true.