[1115] in java-interest
Re: Applets and threads.....
daemon@ATHENA.MIT.EDU (Jonathan Payne)
Sat Aug 19 01:36:44 1995
Date: Fri, 18 Aug 1995 19:02:54 -0700
From: jpayne@starwave.com (Jonathan Payne)
To: madhu.surendranath@bt-sys.bt.co.uk
Cc: java-interest@java.Eng.Sun.COM
Hi All,
I'm having some problems with Thread and Applet inter-communication.....
What I need to do is pass a message (such as a String) from a
Thread (that has been spawned from an Applet) BACK to its parent
Applet.
My first attempt at this was to create a pipe
(PipedInput/OutputStream) between each Thread (as the Applet
itself is a thread), but my problem was that they would not
connect to each other. I guess it was because my Applet could not
find out whether the Thread has its "PipedOutputStream" open or
not.
How can I do this type of "message passing" between Threads, is it
possible or have I missed out on an obvious point?
Any help would be appreciated, thanks, Madhu.
Your applet which creates the thread, should pass a pointer to itself
to the thread's constructor (you will have to subclass class Thread),
so that the thread can call a method in the Applet and pass the
information you want to share.
OR, you can define your applet as implementing Runnable, define a
public void run() {}
method in your applet, and then start the thread like this:
new Thread(this).start();
where "this" is your applet. The above line forks a new Thread and
calls the run() method of the Runnable that is passed to the Thread's
constructor (in this case your Applet). So, now your Thread is
actually running in a method of the Object you wanted to share
information with, which of course makes the whole thing really simple!
Did this make sense?
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