Guys i have an assignment that i don't know how to do it so help me PLEASE !!

notice that

1) i USE J creator LE 4.50
2) the code must be done in " clases and objects "
3)CLASSES should be public so it can be manipulated by a user


A)
IMPLEMENT a class Message. Each message must have a user-name of a sender, a user-name of a receiver, a subject and a
body.
• Implement a class Message with the above attributes.
• Augment your class with a constructor that takes four parameters and initializes the attributes accordingly.
• A message without a sender or a receiver is an invalid message. Further, a message cannot have an empty subject and
body (or there would not be much information in the message). Therefore, at least one of these two attributes must
be a non-empty string. Implement a method isValid() that returns true only if
– the Message object on which the method is invoked has a non-empty sender and receiver, and
– at least one of the body or subject must be a non-empty string.
• Implement a method toString() that returns a string representation of the Message object that the method was
invoked on. For example, the return value of toString() may look as follows:
From: kareem
To: Solver
Subject: CS Assignment
Body: Thanks
What have you done so far?nothing !!
Talk to your tutor, we dont do homework.Quote from: kareem eltanahy on May 23, 2012, 03:35:06 PM

nothing !!