2. Develop a class called AO12Email based on the following specification:

StuPreEmail

- idGen : int = 1000

- id : int

- from : StuPreContact

- to : StuPreContact

- subject : String

- timeStamp : LocalDateTime

+ StuPreEmail()

+ StuPreEmail(from : StuPreContact, to : StuPreContact, subject : String)

+ StuPreEmail(from : StuPreContact, to : StuPreContact, subject : String, time : LocalDateTime)

+ getFrom() : StuPreContact

+ getTo() : StuPreContact

+ getSubject() : String

+ getTimeStamp() : LocalDateTime

+ setFrom(from : StuPreContact) : void

+ setTo(to : StuPreContact) : void

+ setSubject(subject : String) : void

+ toString() : String

• The static memberidGen is used to generate a unique id for each new email object. Its current value should be used when creating a new email object and then incremented (to prepare for the next object). Hint: it needs to be used and updated in each constructor.
• Default constructor: constructs an email object with a unique id based onidGen. Use null value for the remaining data members.
• The three-parameter constructor: constructs an email object with a unique id based onidGen, and the specified from, to, and subject fields. The timestamp field will be set to the current local time:timeStamp = LocalDateTime.now();
• The four-parameter constructor: constructs an email object with a unique id based onidGen and the specified from, to, subject, and time fields
• getXXX() and setXXX() methods follow the general convention of such methods.
• toString(): returns a string representation of the calling Email object in this format:

Subject: subject-str

From: from-contact-in-a-string

To: to-contact-in-a-string

Time: timestamp-in-a-string

• Be sure to use thetoString() method of theStuPreContact class.
• Use this segment of code to convert thetimeStamp data member (aLocalDateTimeobject) to a string: // format: Three-letter-month-name, dd, yyyy, hh:mm AM-or-PM
• DateTimeFormatter formatter = DateTimeFormatter.ofPattern("LLL dd, yyyy, hh:mm a");String timeStr = timeStamp.format(formatter);
• You will use two new classes in this exercise:LocalDateTime andDateTimeFormatter. import java.time.LocalDateTime; import java.time.format.DateTimeFormatter;
• Set up a simplemain()within this Email class to include the following:

1). Add aContact object with your name and with email a..w@e.com.

2). Add a 2^ndContact object with the information of a friend of yours.

3). Add anEmail object using the three-parameter constructor: from you to your friend with some subject string.

4). Add a 2^ndEmail object using the four-parameter constructor: from your friend to you with a different subject. The time argument should beyourFirstEmailVar.getTimeStamp().plusHours(1) which means 1 hour after the first email message. plusHours() is a method of LocalDateTime.

5). Print out the 1^st email object.

6). Print out the 2^nd email object.