Command Line Input Terminating with Ctrl+D

Question

Hi,
I am writing a program, that gets the input from the command line, what I want the program to do it continue to get the input until Ctrl+D is entered but I can not work out how to do this.
Has anyone got any ideas.
Thanks,
Adam

Answer 1

Are you working in a unix system? If so, Control-D means end-of-input, so you don't specifically look for a control-D character, you just check for end of input (end of the stream). This is provided in IO routines, in particular BufferedReader:
"Returns:
A String containing the contents of the line, not including any line-termination characters, or null if the end of the stream has been reached"
So for example:
import java.io.*;
public class test {
  public static void main(String argv[]) {
    String line;
    int i = 0;
    try {
      BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
      while((line = in.readLine()) != null) {
        i++;
    } catch (IOException e) {
      e.printStackTrace();
    System.out.println("Now I'm done, having read " + i + " lines.");