Java tutorial
import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; public class MainClass { public static void main(String[] args) throws IOException { BufferedReader in = new BufferedReader(new InputStreamReader(System.in)); String s; while ((s = in.readLine()) != null && s.length() != 0) System.out.println(s); // An empty line or Ctrl-Z terminates the program } }