Helper class
In object-oriented programming, a helper class is used to assist in providing some functionality, which isn't the main goal of the application or class in which it is used. An instance of a helper class is called a helper object.
Helper classes are often created in introductory programming lessons, after the novice programmer has moved beyond creating one or two classes.
A utility class is a special case of a helper class in which the methods are all static. In general, helper classes do not have to have all static methods, but may have instance variables. Multiple instances of the helper class may exist as well.Example
This is also an example of a utility class.
public class PrependHelper
