Question { Wipro, 59229 }

How many types of action clases are there in stuts and
their uses?

Answer

1.ForwardAction class
2.DispatchAction class
3.IncludeAction class
4.LookUpDispatchAction class
5.MappingDispatchAction class
6.SwitchAction class
7.LocaleDispatchAction class
8.DownloadAction class

Question { TSYS, 31382 }

How to make a class immutable?

Answer

While creating class objects of which will be immutable. The following
things should be kept in mind:
1. Class should be made final so that no class can extend it.
2. Access modifiers of the instance variables must be private so that no
object can have access to it.
3. There should not be any public set method which can change the state of
the object.