HashMap calculates its’ bucket location through hashing method, and store elements through the get() and put() method. In other words, when we are storing elements to memory, we will pass the key-value pair to the put() method, and it will then use the hashCode() method to calculate the location, and then store it. And now, if we want to access elements, we will pass the key to the get() method, and also use the hashCode() method to calculate its’ hash in order to get its’ bucket location, and then use the equals() method to make sure the key-value pair is what we want.