methods write : she not right i think... that's strange
add write method and test Class
try to do a ping-pong : fail, error with the Key I don't know
why..........
add some modifications
push all for test
add
add jar
connection op + beginning in pingpong message : error in buffer write
we send message but problem in the reading part
we receive and send message, we just need to do ping-pong message
ping-pong fonctionne !!