Is it possible to place multiple elements in a single HashMap storage cell?

In the Java HashMap implementation, a storage bucket (cell) can contain multiple elements. This happens due to collisions, when different keys have the same hash code and land in the same bucket.

To resolve collisions, a linked list or a tree (in newer Java versions) is used. Thus, one bucket can store a chain of elements, each with a unique key.

Example: if two keys have the same hash, they will be stored in the same bucket, but in a linked list inside that bucket.