Implement the same electronic chatroom application that you did for exercise

1.Implement the same electronic chatroom application that you did for exercise


2. above, but this time using Java's non-blocking I/O on the server. You may

very well be able to make use of your original client program, but have the

client close its socket only after it has received (and displayed) its own 'Bye'

message sent back from the server. You can also now get rid of the code

dealing with any NoSuchElementException.

At the server end, you will probably find it useful to maintain two Vectors,

the first of these holding references to all SocketChannels of newly-connected

clients for which no data has been processed and the second holding

references to instances/objects of class ChatUser. Each instance of this class

should hold references to the SocketChannel and chatname (a String)

associated with an individual chatroom user, with appropriate 'get' methods to

retrieve these references. As the first message from a given user (the one

holding the user's chatroom nickname) is processed, the user's SocketChannel

reference should be removed from the first Vector and a ChatUser instance

created and added to the second Vector.

It will probably be desirable to have separate methods to deal with the


(i) a user's entry into the chatroom;

(ii) a normal message;

(iii) a user's exit from the chatroom (after sending 'Bye').

Signatures for the first and last of these are shown below.

public static void announceNewUser(

SocketChannel userSocketChannel,

ByteBuffer buffer)

public static void announceExit(String name)

find the cost of your paper

prepare a lead container of mass 1.5 kg and pour 0.65 kg of water into it, both at the room temperature of 20.5°C.

You are at a restaurant eating lunch with a friend. After the meal, your friend realizes they left their wallet at home. Your friend gives you a piece of silver….

Given the above information, how many people did McKinsey and BCG hire in the year 2013?

There are two big consulting firms in Melbourne, McKinsey and Boston Consulting Group (BCG); assume that their clients view them as providing identical consulting services. They hire people on yearly….

write a program that reads a file and displays all of the words in it that are misspelled.

A spell checker can be a helpful tool for people who struggle to spell words correctly. In this exercise, you will write a program that reads a file and displays….