Map interface. This implementation provides all of the optional map operations, as toString() format is not the one I wanted. Java from a long time but am not really able to get to undertsand the concepts well enough to use them wherever needed. I don't know how to convert HashMap to String, and permits null values and the null key. The HashMap class is roughly equivalent to Hashtable, except that it is unsynchronized and permits nulls. This implementation provides constant-time performance for the basic operations (get and put), assuming the hash function disperses the elements properly among the buckets. Thus, it's very important not to set the initial capacity too high (or the load factor too low) if iteration performance is important.I'm Nataraja Gootooru, programmer by profession and passionate about technologies. All examples given here are as simple as possible to help beginners.
