writing data to console at the same time printinf information in java

Question

I want to know how to control the console print format. My problem is that I have 2 threads, one of them constantly prints information to the console, and the other constantly asks the user to write information, but while writing if the other thread prints something, it cuts the phrase the user is writing and splits it. How do you control it?

My code of thread 1:

//Definition of variables

while (exit == false) {
    scanner = new Scanner(System.in);
    message = scanner.nextLine();
}

//Code to use user input

My code of thread 2:

//Definition of variables

while (receive.getExecutingState()) {  
    srvMsg = receive.Receive();
    System.out.println(srvMsg);
}

Console output:

No more data to show.
No more data to show.
hNo more data to show.
eNo more data to show.
llo

I want it to keep printing messages while the user write data but don't split what it's writing.

Thanks in advance!

Edit: As said by @Thomas what I want in a clearer way, is to keep the text the user is writing at the bottom of the console, and the rest being updated.

Answer 1

One way would be to read the character from the users one by one:

• let the writing thread write
• if user enters one character (or more) pause the writing thread until the user presses enter
• when the user presses enter, resume the writing thread

The pause/resume mechanism could be done in several ways, for example by using a Sempahore with one permit that is taken by the reading thread or the writing thread in turn.