[5015] in java-interest
problems hooking up a TextArea to a DataInputStream
daemon@ATHENA.MIT.EDU (James Waldrop)
Thu Jan 25 23:22:07 1996
To: java-interest@java.Eng.Sun.COM
Date: Thu, 25 Jan 1996 18:31:44 -0800
From: James Waldrop <sulam@construct.net>
Hi folks, thanks for any help you can give me on the following problem.
Imagine that I'm trying to write a simple line-mode telnet applet.
For the input window, I want to have a TextField, and for the output
window I want to have a TextArea.
I've gotten a socket hooked up to a DataInputStream, and am even able
to call readLine() on it and get back something. The problem is that
this isn't working past the first line. I suspect the problem is
something in the way I'm handling the threads, since I'm not clear
on how it should be done. Anyway, the relevant bits of code are:
If anyone has something like this that uses the Beta API and is an
applet, I'd appreciate pointers to sample code.
public class LineMode extends Applet implements Runnable {
private Socket socket;
private DataInputStream in;
private TextArea outputArea;
private Thread engine = null;
public void init() {
Panel blah = new Panel();
setLayout(new BorderLayout());
add("Center", blah);
outputArea = new TextArea(24,80);
blah.add(outputArea);
// I've deleted all the exception stuff for brevity.
socket = new Socket("xxx", 7777); // or whatever
in = new DataInputStream(socket.getInputStream());
}
public void start() { // This is where I'm screwing up I suspect.
if (engine == null) {
engine = new Thread(this);
engine.start();
}
}
public void run() {
String line;
try { line = in.readLine(); }
catch (Exception e) { line = null; }
if (line != null) { outputArea.appendText(line); }
}
// EOF
--
James Waldrop / Technical Director
sulam@construct.net / Construct Internet Design
sulam@well.com / http://www.construct.net
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