Java Programming Lab 4 - Classes and Methods The purpose of this lab is to learn how to design and declare classes and methods. Description Read the documentation on class StringBuilder; you can use it to solve this assignment. Declare class Int with attribute "str of type String that represents a nonnegative integer of any size. The objects of type Int will be immutable (the attribute "str" will be final). In class Int: Declare at least two constructors with different parameters. Declare method add() with a parameter of type Int. The method will return an object of type Int that represents the sum of "this" and the parameter passed to the method. Declare method add() with a parameter of type int. The method will sum this" and the parameter. Declare method toString(). Declare method equals(). Declare method compareTo() with a parameter of type Int. The method will compare this" and the parameter passed to the method and will return-1 if "this" is less than the parameter, O if this" is equal to the parameter and 1 if this" is greater than the parameter. In the main method, show the use of every declared constructor and method