Bean scope

it's of five type:
a)singleton

b)prototype

c)session

d)requests

e)global session

-> singleton is by default. so the hash code of all singleton object will be same.

    it can be changed in two ways: 

    1)In config file:  <bean class ="" name="" scope=""/>

    2)Under @Component

                @Scope("")    scope is only used with component.

->prototype: every time new object is give and has different hash code