108. simple chat room 11: realize client group chat

Title Description

Topic realization ： Different clients need to communicate , One client communicates with multiple other clients , Realize group chat function .

Implement one client to communicate with multiple other clients , Run the program , After the server starts , start-up 3 A client program , Then send information to the other two clients through the first client , Then the other two clients will receive the information sent by the server .

Their thinking

Create a service class ：ClientOneToManyServerFrame, Inherit JFrame class

Define a createSocket() Method , Used to create a service Socket And listening to clients . And create and start the thread object and forward the received information sent by the client to other clients .

Create a client class ：ClientOneToManyClientFrame, Inherit JFrame class

Define a createClientSocket() Method , Used to create a connection to the server Socket object , Output stream object , And the start thread object receives the information forwarded by the server .

Technical focus ：

The server listens to the information sent by the client through the thread , When a client sends information , This information will be sent to other clients that have logged in to the server , But this message will not be sent to the sender , The client also listens to the information forwarded by the server through threads .
(1) Create a thread class on the server side S