How remove Method is Implemented in a HashMap in Java ?
Remove() method in HashMap uses logic similar to the one used in get() method. First we locate the correct bucket in HashMap for an entry. Then within that bucket we remove the element e. It is similar to removing a node from a single-linked list.
If e is the first element in the bucket we set the corresponding element of Hash to e.next. Else we set the next field of the element just before e to e.next.