Closing I/O

[MethadoneBoy]

Howdy

How does one close the input from a BufferedReader? For instance:

PortNumber = Text.readInt ( KeyIn );
Print ( PortNumber );

just allows me to enter a number but when I press Enter, the cursor merely skips to a new line instead of printing to the screen. Anyone any ideas?

(NB: I'm using the javagently Text class and Print is another method elsewhere in the code that basically just prints the Integer)

[plenderj]

Why not do the stuff yourself ?

		int varInput = 0;
		try {
			BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
			varInput = Integer.valueOf(in.readLine().trim()).intValue();
		}
		catch (IOException e) {	}

That will read an integer.
It works like a dream for me.
Below is the latest code for the project. I'm off home now for the evening, so talk to you tomorrow.
You coming up to dublin ?

/*
 * 
 * ***************************************
 * ***                                 ***
 * *** 2ICT1 Communications Project    ***
 * ***                                 ***
 * ***  Mark Deegan                    ***
 * ***  Nicola Ennis                   ***
 * ***  Robert Hickson                 ***
 * ***  Jamie Plenderleith             ***
 * ***                                 ***
 * ***************************************
 * ***                                 ***
 * *** Tunneling IPv6 Packets over an  ***
 * ***  IPv4 Network                   ***
 * ***                                 ***
 * ***************************************
 * 
*/

import java.net.*;
import java.io.*;

public class sockTunnel
{
	
	public static void main (String[] args) 
	{					
		
		try {
			if (args[0].equals("-credits")) {
				doIntro(true);			
			}else {
				doIntro( false );
			}
		} 
		catch (ArrayIndexOutOfBoundsException e) {
			doIntro( false );
		}
			
		int varInput = 0;
		try {
			BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
			varInput = Integer.valueOf(in.readLine().trim()).intValue();
		}
		catch (IOException e) {	}
		
		switch (varInput) {
			case 1: {
					    doClientSetup();
						break;
				    }
			case 2: {
					    doServerSetup();
						break;
				    }
			default:{
						doBadSelection();
						break;
					}
		}
	}	
	
	
	
	/*  
	 *  User I/O Related
	 * 
	 */	
	private static void p (String strString) { System.out.println(strString); }
	private static void p ()                 { p("");                         }
	private static void doPrompt()           { System.out.print("> ");        }
	private static void doBadSelection() {
		p("***");
		p("*** Invalid selection !");
		p("***");
		doIntro(false);
	}

	
	
	
	
	/* 
	 *  Menu choices code
	 * 
	 *    Below is the code for displaying the menus to the user
	 *    Code to handle the user input is contained elsewhere
	 */
	
	private static void doIntro(boolean showCredits) {
		if (showCredits) { doIntroCredits(); }
		doIntroChoices();
		doPrompt();
	}	
	private static void doIntroCredits() {
		p("***************************************");
		p("***                                 ***");
		p("*** 2ICT1 Communications Project    ***");
		p("***                                 ***");
		p("***   Mark Deegan                   ***");
		p("***   Nicola Ennis                  ***");
		p("***   Robert Hickson                ***");
		p("***   Jamie Plenderleith            ***");
		p("***                                 ***");
		p("***************************************");
	}
	private static void doIntroChoices() {
		p("***************************************");
		p("***                                 ***");
		p("*** Would you like this system to   ***");
		p("***  act as the client or server?   ***");
		p("***                                 ***");
		p("***  1) Client                      ***");
		p("***  2) Server                      ***");
		p("***                                 ***");
		p("***************************************");	
	}		
	private static void doClientMenu() {
		p("***************************************");
		p("***                                 ***");
		p("*** What hostname/ip address would  ***");
		p("***  you like to connect to ?       ***");
		p("***                                 ***");
		p("*** Given in the following form;    ***");
		p("***  hostname:port                  ***");
		p("***                                 ***");
		p("***************************************");
	}
	private static void doServerMenu() {
		p("***************************************");
		p("***                                 ***");
		p("*** What TCP port would you like    ***");
		p("***  you like to listen on ?        ***");
		p("***  (1 - 65535)                    ***");
		p("***                                 ***");
		p("***************************************");
	}
	

	/*
	 *  Menu choice handler code
	 *
	 *    Below is the code for handling user input into the
	 *    menus. This controls connecting + listening etc.
	 */

	private static void doClientSetup() {
		p(""); doClientMenu(); doPrompt(); String varInput = "";
		try {
			BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
			varInput = in.readLine().trim();
		} catch (IOException e) {	}
		
		if (! (varInput == "") ) {
			if (! (varInput.lastIndexOf(":") == -1) ) {
				String hostname = "";
				int port = -1;
				try { hostname = varInput.substring(0, varInput.indexOf(":")); } 
				catch (StringIndexOutOfBoundsException e) { }								
				try { port = Integer.parseInt(varInput.substring(varInput.indexOf(":") + 1)); }
				catch (NumberFormatException e) { }
				
				connect ( hostname , port );								
				
			} else {				
				clearScreen();
				p("***************************************");
				p("*** Please enter a hostname and     ***");
				p("***  port combination               ***");				
				p("***************************************");
				doClientSetup();
			}
			
		} else {
			System.out.println("varInput is empty");
		}
		doLoop();
	}
			
	private static void doServerSetup() {
		doServerMenu();
		doPrompt();
		int varInput = TextIO.getInt();
		
		if ((varInput >= 1) && (varInput <= 65535)) {
			doLoop();
		}
		
	}

	/*  
	 *  Handy little functions
	 */ 
	
	private static void doLoop()      { while (true) { } } 	
	private static void clearScreen() { for (int i = 0; i < 50; i++) { p(); } }	
	private static boolean containsInvalidCharacters( String varString ) { return false; }
	
	
	/*
	 *  connect() and listen() Methods
	 * 
	 *   connect() will connect to a remotehost
	 *    As parameters it is passed the hostname and port number
	 * 
	 *   listen() will listen for a connectio
	 *    As a parameter this is passed the port number on which to listen
	 */
	
	private static void connect ( String strHost , int port ) {
		Socket sock          = null;
		PrintWriter out      = null;
		BufferedReader bRead = null;
		String input         = "";

		try {
				
			p("***************************************");
			p("*** Connecting ...                  ***");
			p("***************************************");			
			sock = new Socket( strHost , port );
			
			p("***************************************");
			p("*** Connected                       ***");
			p("*** Now sending file ...            ***");
			p("***************************************");			
			out = new PrintWriter( sock.getOutputStream(), true );
			try {
				bRead = new BufferedReader( new FileReader( "testfile.txt" ) );
				while ( ( input = bRead.readLine() ) != null ) {
					out.println( input );
				}
				p("File sent");
			}
			catch ( FileNotFoundException e ) {
				p( "***" );
				p( "*** Could not find testfile.txt !" );
				p( "***" );
				doLoop();
			}			
			catch ( IOException e ) {
					
			}
		} 
		catch ( UnknownHostException e ) {
			p( "Unknown host !" );
			doLoop();
		}
		catch ( IOException e ) {
				
		}
	}
	
	private static void listen ( int port ) { }
}

[MethadoneBoy]

Yeah got that working now. Still can't get the I/O for the host name of the Server for some reason... talk to you about it tomorrow. Yeah, I'll be in Dublin tomorrow so I'll see you around.