Terminal Stops Echoing Input

Question

I've been using Terminal (OS X Lion) to ssh into a Linux server (itself running in a virtual machine) to do development work, and have been doing this on this system for the past half year.
A few days ago my Mac crashed and I had to restore it (and the Linux VM) from a backup. Since then Terminal's been behaving strangely. It always works properly when I first open it, but after between a few minutes and a few hours it stops echoing keyboard input. In other words, if I type "ls -al" and hit enter, nothing appears at the command prompt. But after hitting enter the command is sent to the Linux box and run anyway. Nothing I type is being printed back to my screen though everything is still being invisibly sent to the remote server.
I can't figure out if it's Terminal itself or some control code being erroneously sent from the Linux server that stops it from echoing input.
When it happens I have to close the Terminal window and open a new one. That fixes it, until the issue invariably pops up again.
Any idea what's going on?

Answer 1

try something like this
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
String user_input = reader.readLine();
if(!(user_input.equals(""))){
      System.exit(0);
}else{
//run your program
}Greetings,.
Arnoud