Hashtable internally contains buckets in which it stores the key/value pairs. The Hashtable uses the key’s hashcode to determine to which bucket the key/value pair should map. The function to get bucket location from Key’s hashcode is called hash function. A hash function always returns a number for an object.Click to see full answer. Similarly one may ask, how HashMap works internally in Java with example?HashMap in Java works on hashing principle. HashMap internally stores mapping in the form of Map. Entry object which contains both key and value object. When you want to retrieve the object, you call the get() method and again pass the key object. how do hash tables work? A hash table is a data structure that is used to store keys/value pairs. It uses a hash function to compute an index into an array in which an element will be inserted or searched. By using a good hash function, hashing can work well. Beside above, what is Hashtable in Java with example? Hashtable in java with example. This class implements a hash table, which maps keys to values. Any non-null object can be used as a key or as a value. Hashtable is similar to HashMap except it is synchronized.How is hash table implemented in Java?Hashtable is an implementation of a key-value pair data structure in java. You can store and retrieve a ‘value’ using a ‘key’ and it is an identifier of the value stored. Objects with non-null value can be used as a key or value. Key of the Hashtable must implement hashcode() and equals() methods.