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Groups > comp.lang.java.programmer > #32005
| Newsgroups | comp.lang.java.programmer |
|---|---|
| Date | 2015-07-14 06:31 -0700 |
| References | <mo1g22$7hd$1@dont-email.me> <mo1l69$l8g$1@dont-email.me> <mo1m3c$nqg$1@dont-email.me> <mo1p62$m7p$1@dont-email.me> <mo1rc8$ri1$1@dont-email.me> |
| Message-ID | <e1087f9c-0028-44a3-99bf-5c4356626e9d@googlegroups.com> (permalink) |
| Subject | Re: javax.swing.Timer blocking program termination |
| From | e.d.programmer@gmail.com |
On Monday, July 13, 2015 at 10:17:14 PM UTC-4, Jeff Higgins wrote:
> On 07/13/2015 09:35 PM, Jeff Higgins wrote:
> > On 07/13/2015 08:46 PM, Knute Johnson wrote:
> >> On 7/13/2015 17:27, Jeff Higgins wrote:
> >>> On 07/13/2015 07:03 PM, Knute Johnson wrote:
> >>>> So I have this program that uses a couple of javax.swing.Timers. I
> >>>> forgot to put in code to stop one of the timers yet the program would
> >>>> still terminate. I have set the default close operation for the frame
> >>>> to be DISPOSE_ON_CLOSE.
> >>>>
> >>>> What I found was that a timer of less the 1000ms would prevent an
> >>>> application based on a JFrame from stopping but 1000ms or more and it
> >>>> would stop just fine.
> >>>>
> >>>> I know that javax.swing.Timer uses a common thread for all timers but I
> >>>> don't see anywhere that describes the stopping behavior.
> >>>>
> >>>> The program below will stop if the JFrame is closed and the timer is
> >>>> 1000ms or greater but hang if it is less. I would be really curious to
> >>>> know if somebody else can duplicate this.
> >>>>
> >>>> import java.awt.*;
> >>>> import java.awt.event.*;
> >>>> import javax.swing.*;
> >>>>
> >>>> public class test extends JFrame {
> >>>> public test() {
> >>>> Timer timer = new Timer(1000,event -> {});
> >>>> setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
> >>>> setSize(400,300);
> >>>> setVisible(true);
> >>>> timer.start();
> >>>> }
> >>>>
> >>>> public static void main(String... args) {
> >>>> EventQueue.invokeLater(() -> new test());
> >>>> }
> >>>> }
> >>>>
> >>>
> >>>
> >>> import java.awt.EventQueue;
> >>> import javax.swing.JFrame;
> >>> import javax.swing.Timer;
> >>>
> >>> public class test extends JFrame {
> >>> public test() {
> >>> Timer timer = new Timer(900, event -> {
> >>> System.out.println("-"); });
> >>> addWindowListener(new java.awt.event.WindowAdapter() {
> >>> @Override
> >>> public void windowClosing(java.awt.event.WindowEvent
> >>> windowEvent) {
> >>> System.out.println("Close"); }});
> >>> setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
> >>> setSize(400, 300);
> >>> setVisible(true);
> >>> timer.start();
> >>> }
> >>>
> >>> public static void main(String... args) {
> >>> EventQueue.invokeLater(() -> new test());
> >>> }
> >>> }
> >>>
> >>>
> >>> jeff@debian:~$ javac test.java
> >>> jeff@debian:~$ java -showversion test
> >>> java version "1.8.0_40"
> >>> Java(TM) SE Runtime Environment (build 1.8.0_40-b25)
> >>> Java HotSpot(TM) 64-Bit Server VM (build 25.40-b25, mixed mode)
> >>>
> >>> -
> >>> -
> >>> Close
> >>> -
> >>> -
> >>> -
> >>> -
> >>> ^Z
> >>> [1]+ Stopped java -showversion test
> >>> jeff@debian:~$ jobs
> >>> [1]+ Stopped java -showversion test
> >>> jeff@debian:~$ fg
> >>> java -showversion test
> >>> -
> >>> -
> >>> -
> >>> -
> >>> ^Cjeff@debian:~$
> >>>
> >>>
> >>
> >> and does it stop on your Linux (I assume) system if the delay is 1000ms
> >> or more?
> >>
> > Very consistantly
> > With 1000 it continues as long as I can stand.
> > With 1001 I get
> > -
> > Close
> > -
> > -
> > -
> > -
> > jeff@debian:~$
> >
> > With 1002 I get
> > -
> > Close
> > -
> > -
> > -
> > jeff@debian:~$
> >
> > With 1003 I get
> > -
> > Close
> > -
> > jeff@debian:~$
> >
> > With 1500 I get
> > -
> > Close
> > -
> > jeff@debian:~$
> >
> >
> If I put a timer.stop()
>
> addWindowListener(new java.awt.event.WindowAdapter() {
> @Override
> public void windowClosing(java.awt.event.WindowEvent windowEvent)
> { System.out.println("Close"); timer.stop();}});
>
> for values of 1000 or less continues to print -
> for values greater than 1000 doesn't print any - after Close
Why wouldn't a timer stop? I pasted that in and the last thing it always prints is the "Close". I'm running this test in Eclipse Luna on JDK 8 update 45 on Windows 8.1.
import java.awt.EventQueue;
import javax.swing.JFrame;
import javax.swing.Timer;
import javax.swing.WindowConstants;
public class test extends JFrame {
public test() {
final Timer timer = new Timer(900,event -> {
System.out.println("-"); });
addWindowListener(new java.awt.event.WindowAdapter() {
@Override
public void windowClosing(final java.awt.event.WindowEvent windowEvent) {
timer.stop();
System.out.println("Close"); }});
setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
setSize(400,300);
setVisible(true);
timer.start();
}
public static void main(final String... args) {
EventQueue.invokeLater(() -> new test());
}
}
Back to comp.lang.java.programmer | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
javax.swing.Timer blocking program termination Knute Johnson <nospam@rabbitbrush.frazmtn.com> - 2015-07-13 16:03 -0700
Re: javax.swing.Timer blocking program termination Jeff Higgins <jeff@invalid.invalid> - 2015-07-13 20:27 -0400
Re: javax.swing.Timer blocking program termination Knute Johnson <nospam@rabbitbrush.frazmtn.com> - 2015-07-13 17:46 -0700
Re: javax.swing.Timer blocking program termination Jeff Higgins <jeff@invalid.invalid> - 2015-07-13 21:35 -0400
Re: javax.swing.Timer blocking program termination Jeff Higgins <jeff@invalid.invalid> - 2015-07-13 22:13 -0400
Re: javax.swing.Timer blocking program termination Jeff Higgins <jeff@invalid.invalid> - 2015-07-13 22:27 -0400
Re: javax.swing.Timer blocking program termination e.d.programmer@gmail.com - 2015-07-14 06:31 -0700
Re: javax.swing.Timer blocking program termination Jeff Higgins <jeff@invalid.invalid> - 2015-07-14 10:15 -0400
Re: javax.swing.Timer blocking program termination Jeff Higgins <jeff@invalid.invalid> - 2015-07-14 10:22 -0400
Re: javax.swing.Timer blocking program termination e.d.programmer@gmail.com - 2015-07-14 07:39 -0700
Re: javax.swing.Timer blocking program termination Eric Sosman <esosman@comcast-dot-net.invalid> - 2015-07-14 10:53 -0400
Re: javax.swing.Timer blocking program termination e.d.programmer@gmail.com - 2015-07-14 10:16 -0700
Re: javax.swing.Timer blocking program termination Eric Sosman <esosman@comcast-dot-net.invalid> - 2015-07-14 13:25 -0400
Re: javax.swing.Timer blocking program termination e.d.programmer@gmail.com - 2015-07-14 10:45 -0700
Re: javax.swing.Timer blocking program termination Eric Sosman <esosman@comcast-dot-net.invalid> - 2015-07-14 14:16 -0400
Re: javax.swing.Timer blocking program termination Gene Wirchenko <genew@telus.net> - 2015-07-14 12:56 -0700
Re: javax.swing.Timer blocking program termination Eric Sosman <esosman@comcast-dot-net.invalid> - 2015-07-14 16:14 -0400
Re: javax.swing.Timer blocking program termination e.d.programmer@gmail.com - 2015-07-15 05:11 -0700
Re: javax.swing.Timer blocking program termination Jeff Higgins <jeff@invalid.invalid> - 2015-07-15 08:33 -0400
Re: javax.swing.Timer blocking program termination Martin Gregorie <martin@address-in-sig.invalid> - 2015-07-15 18:46 +0000
Re: javax.swing.Timer blocking program termination Jeff Higgins <jeff@invalid.invalid> - 2015-07-15 21:18 -0400
Re: javax.swing.Timer blocking program termination Jeff Higgins <jeff@invalid.invalid> - 2015-07-15 22:13 -0400
Re: javax.swing.Timer blocking program termination Jeff Higgins <jeff@invalid.invalid> - 2015-07-14 10:55 -0400
Re: javax.swing.Timer blocking program termination Knute Johnson <nospam@rabbitbrush.frazmtn.com> - 2015-07-14 08:17 -0700
Re: javax.swing.Timer blocking program termination Jeff Higgins <jeff@invalid.invalid> - 2015-07-14 11:42 -0400
Re: javax.swing.Timer blocking program termination Martin Gregorie <martin@address-in-sig.invalid> - 2015-07-14 18:35 +0000
Re: javax.swing.Timer blocking program termination Jeff Higgins <jeff@invalid.invalid> - 2015-07-14 15:17 -0400
Re: javax.swing.Timer blocking program termination Jeff Higgins <jeff@invalid.invalid> - 2015-07-14 15:36 -0400
Re: javax.swing.Timer blocking program termination Eric Sosman <esosman@comcast-dot-net.invalid> - 2015-07-14 15:51 -0400
Re: javax.swing.Timer blocking program termination Martin Gregorie <martin@address-in-sig.invalid> - 2015-07-14 21:51 +0000
Re: javax.swing.Timer blocking program termination Knute Johnson <nospam@rabbitbrush.frazmtn.com> - 2015-07-14 15:08 -0700
Re: javax.swing.Timer blocking program termination Martin Gregorie <martin@address-in-sig.invalid> - 2015-07-15 01:16 +0000
Re: javax.swing.Timer blocking program termination Jeff Higgins <jeff@invalid.invalid> - 2015-07-14 16:09 -0400
Re: javax.swing.Timer blocking program termination Jeff Higgins <jeff@invalid.invalid> - 2015-07-14 18:32 -0400
Re: javax.swing.Timer blocking program termination Jeff Higgins <jeff@invalid.invalid> - 2015-07-14 18:34 -0400
Re: javax.swing.Timer blocking program termination Jeff Higgins <jeff@invalid.invalid> - 2015-07-14 20:31 -0400
Re: javax.swing.Timer blocking program termination Knute Johnson <nospam@rabbitbrush.frazmtn.com> - 2015-07-14 08:16 -0700
Re: javax.swing.Timer blocking program termination Joerg Meier <joergmmeier@arcor.de> - 2015-07-14 08:32 +0200
Re: javax.swing.Timer blocking program termination Jeff Higgins <jeff@invalid.invalid> - 2015-07-14 22:18 -0400
Re: javax.swing.Timer blocking program termination Jeff Higgins <jeff@invalid.invalid> - 2015-07-15 08:26 -0400
Re: javax.swing.Timer blocking program termination Knute Johnson <nospam@rabbitbrush.frazmtn.com> - 2015-07-15 11:05 -0700
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