swing application error on BBB

What is your linux script source?

i saved my script in /usr/bin/myscript.sh

#!/bin/bash

java - jar /home/debian/myapp.jar

trying to execute from my myapp.service that saved on /usr/lib/systemd/system and symliked to /etc/systemd/system

Thanks, for reply, find the complete error below

Feb 18 17:54:23 beaglebone QMServer.sh[1404]: Jar version = RXTX-2.2pre1

Feb 18 17:54:23 beaglebone QMServer.sh[1404]: native lib Version = RXTX-2.2pre2

Feb 18 17:54:23 beaglebone QMServer.sh[1404]: Exception in thread "main" java.awt.HeadlessException:

Feb 18 17:54:23 beaglebone QMServer.sh[1404]: No X11 DISPLAY variable was set, but this program performed an operati...s it.

Feb 18 17:54:23 beaglebone QMServer.sh[1404]: at java.awt.GraphicsEnvironment.checkHeadless(GraphicsEnvironment.java:204)

Feb 18 17:54:23 beaglebone QMServer.sh[1404]: at java.awt.Window.<init>(Window.java:536)

Feb 18 17:54:23 beaglebone QMServer.sh[1404]: at java.awt.Frame.<init>(Frame.java:420)

Feb 18 17:54:23 beaglebone QMServer.sh[1404]: at java.awt.Frame.<init>(Frame.java:385)

Feb 18 17:54:23 beaglebone QMServer.sh[1404]: at javax.swing.JFrame.<init>(JFrame.java:189)

Feb 18 17:54:23 beaglebone QMServer.sh[1404]: at token.TokenUpdaterGUI.main(TokenUpdaterGUI.java:282)

debian@beaglebone:~$

In the OP you list the following errors:

java.awt.eventqueue3.run

java.security.accesscontroller.doPrevilidged(native method)

java.security.protectiondomain$javasecurityaccessimpl.dointersection

java.awt.eventqueue.dispatchevent

then when you state "find the complete error below"

Feb 18 17:54:23 beaglebone QMServer.sh[1404]: Jar version = RXTX-2.2pre1

Feb 18 17:54:23 beaglebone QMServer.sh[1404]: native lib Version = RXTX-2.2pre2

Feb 18 17:54:23 beaglebone QMServer.sh[1404]: Exception in thread "main" java.awt.HeadlessException:

Feb 18 17:54:23 beaglebone QMServer.sh[1404]: No X11 DISPLAY variable was set, but this program performed an operati...s it.

Feb 18 17:54:23 beaglebone QMServer.sh[1404]: at java.awt.GraphicsEnvironment.checkHeadless(GraphicsEnvironment.java:204)

Feb 18 17:54:23 beaglebone QMServer.sh[1404]: at java.awt.Window.<init>(Window.java:536)

Feb 18 17:54:23 beaglebone QMServer.sh[1404]: at java.awt.Frame.<init>(Frame.java:420)

Feb 18 17:54:23 beaglebone QMServer.sh[1404]: at java.awt.Frame.<init>(Frame.java:385)

Feb 18 17:54:23 beaglebone QMServer.sh[1404]: at javax.swing.JFrame.<init>(JFrame.java:189)

Feb 18 17:54:23 beaglebone QMServer.sh[1404]: at token.TokenUpdaterGUI.main(TokenUpdaterGUI.java:282)

they don't show the same errors.

several things

1) In the second set of error messages, it says "no X11 DISPLAY variable set", which is probably why it can't display and gives you awt errors. Could you add a line to your bash script, prior to executing the java command

echo $DISPLAY

and we'll see what that returns

2) Are logged in with a bash shell?

3) Are you running the script as

bash myscript.sh

or just

myscript.sh

4) change your script

#!/bin/bash

echo $DISPLAY

cd /home/debian

java - jar myapp.jar

and see if that give a different result

Mike

ramanc51

     Key message is HeadlessException (Java Platform SE 6) and No X11 DISPLAY variable was set, but this program performed an operati...s it.

This means you need X windows environment properly set up inside the bash shell which is normally a text based environment. To overcome this, you will need to start X11 process with the application as startup. Or avoid doing any graphical commands in your source.

Clem

clem57 he did say it runs from the command line, so it may just be that the DISPLAY variable is not being passed to the subprocess spawned when he runs the bash script.

he may just have to do an

export DISPLAY=value prior to running the script so that the subprocess has access to it, or add to his .bashrc

Mike

Thank you mike, yes both error are for different java GUI app but difference is number of GUI elements, prior higher later lower, now my answer

1. echo $DISPLAY added prior to java program, no result same error, but this time one extra line i saw that is :0.0
2. I do not know which is default shell on BBB, on desktop there is LXTerminal, i am using that
3. NO, i am not running as you said, i just tested as given bellow

      cd /usr/bin # i stored my script here

      ./myscript.sh

  Both app are working here, i am also tested as following

    cd /usr/bin

    bash myscript.sh,

it is also working.

   4. I added as you said no result

Actually my intention is to start my app automatically after BBB boot for that i did following

i created my myapp.service that saved on /usr/lib/systemd/system and symliked to /etc/systemd/system     H

Hi Mike, on your reply to clem57, you said export DISPLAY=value, here value=?

value would be :0.0 or localhost:0.0 based on what you typed above

so

export DISPLAY=localhost:0.0

Mike

Raman Arumugam wrote:

 

 

Actually my intention is to start my app automatically after BBB boot for that i did following

 

That might be a problem for the reasons clem57 stated, you need to have the xserver started prior to running your program.

Raman Arumugam wrote:

 

1. NO, i am not running as you said, i just tested as given bellow

      cd /usr/bin # i stored my script here

      ./myscript.sh

  Both app are working here, i am also tested as following

    cd /usr/bin

    bash myscript.sh,

it is also working.

 

I'm now confused, is the script working now?

also, try typing

echo $SHELL

to see if it tells you which shell you are running

or if that doesn't produce anything

grep <your username> /etc/passwd

I think you had indicated you are using user debian, so

grep debian /etc/passwd

the last entry will tell you your default shell

Mike

Hi Mike after changing as you said export DISPLAY=localhost:0.0, i got following error message, QMServer.service is my service to auto start my java app through QMServer.sh

debian@beaglebone:/usr/bin$ sudo systemctl daemon-reload

debian@beaglebone:/usr/bin$ sudo systemctl start QMServer.service

debian@beaglebone:/usr/bin$ systemctl status QMServer.service

QMServer.service - QMServer

      Loaded: loaded (/lib/systemd/system/QMServer.service; enabled)

      Active: failed (Result: exit-code) since Thu, 18 Feb 2016 20:11:56 +0530; 11s ago

     Process: 1936 ExecStart=/usr/bin/QMServer.sh (code=exited, status=1/FAILURE)

      CGroup: name=systemd:/system/QMServer.service

Feb 18 20:11:56 beaglebone QMServer.sh[1936]: at java.awt.GraphicsEnvironment.createGE(GraphicsEnvironment.java:103)

Feb 18 20:11:56 beaglebone QMServer.sh[1936]: at java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment(GraphicsEn...a:82)

Feb 18 20:11:56 beaglebone QMServer.sh[1936]: at sun.awt.X11.XToolkit.<clinit>(XToolkit.java:126)

Feb 18 20:11:56 beaglebone QMServer.sh[1936]: at java.lang.Class.forName0(Native Method)

Feb 18 20:11:56 beaglebone QMServer.sh[1936]: at java.lang.Class.forName(Class.java:264)

Feb 18 20:11:56 beaglebone QMServer.sh[1936]: at java.awt.Toolkit$2.run(Toolkit.java:860)

Feb 18 20:11:56 beaglebone QMServer.sh[1936]: at java.awt.Toolkit$2.run(Toolkit.java:855)

Feb 18 20:11:56 beaglebone QMServer.sh[1936]: at java.security.AccessController.doPrivileged(Native Method)

Feb 18 20:11:56 beaglebone QMServer.sh[1936]: at java.awt.Toolkit.getDefaultToolkit(Toolkit.java:854)

Feb 18 20:11:56 beaglebone QMServer.sh[1936]: at sun.swing.SwingUtilities2.getSystemMnemonicKeyMask(SwingUtilities2....2020)

debian@beaglebone:/usr/bin$

For command grep debian /etc/passwd, i got following message

debian:x:1000:1000:Demo User:/home/debian:bin/bash

For command grep debian /etc/passwd, i got following message

debian:x:1000:1000:Demo User:/home/debian:bin/bash

That means by default you are running the bash shell, that's good, I just wanted to verify