###The hashCode Contract Quoting the source: The general contract of hashCode is: Whenever it is invoked on the same object more than once during an execution of a Java application, the hashCode ...

As to maintain the general contract for the hashCode method, which states that equal objects must have equal hash codes. If two objects have the same hashcode then they are NOT necessarily equal.

Abstract: Hand sign recognition is an essential part in robot control, human computer interaction, communication with deaf or speech impaired people etc. where performance and time complexity are very ...