/**
/  just playing around with "terminal" input; uses terminal I/O as used in
/  example FileCopy.java (itself from Flanagan's "Java Examples in
/  a Nutshell", FIRST EDITION, O'Reilly)
/
/  simply "parrot" back every line the user enters to the screen, until 
/  the user types "HUSH!" to make it stop.
/   
/   modified by: Sharon M. Tuttle
/   last modified: 4-9-01
**/

import java.io.*;

public class Parrot
{
	public static void main(String[] args)
	{
		BufferedReader 	inBuffReader;
		String			userLine;
		
		// being kind --- telling the user how to escape...
		System.out.println("Polly wants to parrot everything you type in ---");
		System.out.println("   but Polly will stop if you enter the line HUSH!");
		System.out.println();
		System.out.flush();

		// set up a BufferedReader to read from the terminal (System.in)
		// (this BufferedReader() constructor expects a Reader instance
		// as an argument --- this InputStreamReader() constructor 
		// can accept InputStream System.in to provide a Reader instance.)
		inBuffReader = new BufferedReader(
			new InputStreamReader(System.in));
	
		// get the first line typed in by the user;
		// (system made me put this in a try-catch block,
		// by the way --- this can throw an IOException;)
		try
		{
			userLine = inBuffReader.readLine();

			// has user asked you to HUSH yet? If not, "parrot" the 
			// response back to the screen, and keep going until asked
			// to stop;
			while (!userLine.equals("HUSH!"))
			{

				// "parrot" latest user response back to the screen
				System.out.println(userLine);
				System.out.println();	// extra blank line, to make output "prettier"
			
				// get next line
				userLine = inBuffReader.readLine();
			}
		}
		catch (IOException exc)
		{
			System.out.println(exc.getMessage());
		}	

		// whether I get here because HUSH! was entered, or because
		// of a readLine()-thrown IOException --- I think closing the
		// BufferedReader and exiting ought to be a reasonable 
		// reaction.		
		finally
		{
			// close inBuffReader and leave --- yeah, IT can throw an
			// IOException, too...!
			System.out.println("Polly says 'bye, now...");
			try
			{
				inBuffReader.close();
			}
			catch (IOException exc)
			{
				System.out.println(exc.getMessage());
			}
			System.exit(0);
		}
	}
}