can some explain the concept of enumeration for me

Answer 1

@Tiger, what you explained is enum type not enumuation

http://docs.oracle.com/javase/tutorial/java/javaOO/enum.html

Answer 2

Enumeration is an interface.

An object that implements the Enumeration interface generates a series of elements, one at a time. Successive calls to the nextElement method return successive elements of the series.

For example, to print all elements of a Vector<E> v:

for (Enumeration<E> e = v.elements(); e.hasMoreElements();){
System.out.println(e.nextElement());
}

Methods are provided to enumerate through the elements of a vector, the keys of a hashtable, and the values in a hashtable.

https://docs.oracle.com/javase/7/docs/api/java/util/Enumeration.html

Answer 3

Enumerations are a set of objects that represent a related set of choices:

Ex:

enum Animals {CAT, TIGER, LION}

Animals tiger = Animals.TIGER;

The method values() returns an array of the ordered list of objects defined for the enum.

Ex:

for (Animals a: Animals.values ()){
System.out.println (a);
}