OOP Lab Task 1

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Required Tutorials

Requirements

  • Write a class Message (that may be used later as a data carrier between a chat client and all the other clients connected to a server). This class needs to:
    • Store the name of the sender and a message content.
    • Be immutable (once an object of this type is created, its contents can't be changed).
    • Allow reading of the sender and content information from the Message objects in a way specific to chat programs: "sender: contents". This must be done using only one method call. Try first with a method of your own. Add another method, that does exactly the same thing but whose signature is
      public String toString()
      .
  • Write another class called Main (the default class created if you created a project within NetBeans), which should contain only the main method, which instantiates at least three objects of type Message and then display their formatted string on the screen.

Notes:

  • Each class and class member must have one of the two access modifiers public or private.
  • The names of the classes must be identical to the ones specified above.

Submitting:

  • The assignment is submitted attaching the Java source code files exclusively to an e-mail sent to arhitectura_procesoarelor@yahoo.com.
  • The subject of the e-mail will be [OOP_1]
  • The body of the e-mail will contain the name the student and any additional command you want to make.
  • Attention Any deviation from these instructions may lead to the loss of the entire amount of points.