Multi-User Console Chat Program

My task is to create multiuser console chat program. During whole day of poking around , i finally stand on such concept:

1. When running , Server part must stay into while(true) loop and create threads on each ServerSocket.accept() call, providing socket object inside thread. i.e.

while (true){
System.out.println("Waiting for client to connect");
Thread t = new Thread(new Runner(servSocket.accept(),listOfClientSockets));
System.out.println("Starting thread");
t.start();
}

2. Client side always stays within while(true) loop and waiting for user input with ScannerInstance.nextLine() method.
As soon as user prints something and hits enter, data being captured from scanner and thrown to socket output stream to the server.

My question is : if all parties (X clients and server) are actually in waiting mode (server is waiting for connections and each client is waiting for user input), who will refresh the screen for each client to draw the messages other parties sent?

At this time , each party see updates only when he hits enter and while loop does next iteration reading data from buffer and displaying on console.