Java HashMap is the part of Collections since JDK1.2. Java HashMap provides the underlying implementation of the Map interface of Java. The HashMap is the  hash table based implementation of Java’s Map interface.

A Map, as you might know, is the collection of key-value pairs. It maps keys to values. It stores data in pairs one is key, and another is value.

If we want to access any value, we need a key to it. HashMap uses the Hashing technique that’s why we called it HashMap. In Hashing, we use to convert the long string into a small string, and that represents the same string. A shorter value helps us in indexing and faster searches.

#java #java hashmap #java’s map