Are the listeners threads?

Hi,
excuse me for the simplicity of my question.
I have this code:
public class MyClass
private AClass a;
public void aMethod()
button1.addActionListener(new
ActionListener()
public actionPerformed(ActionEvent e)
a.m1();
button2.addActionListener(new
ActionListener()
public actionPerformed(ActionEvent e)
a.m2();
If I push in the same time the two buttons, are there two threads? If yes, the object "a" is common or there is a copy of it for every thread? If the object is common, can I use the synchronization to serialize the execution of the two methods?
Thanks a lot in advance!

Both actionPerformed methods run in the single AWT event dispatching
thread, so they never run simultaneously. That's the reason why the
code in those methods should be fast, because no other events can
be dispatched while your code is running.
kind regards,
Jos

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I bought my mac book pro 4 years ago and it is really slow now. I have downloaded Etrecheck after reading some threads on here and here are the results

I got my MacBook Pro 4 years ago and its getting really slow.
After reading dome threads on this site i downloaded Etrecheck and here are the results.
Any help would be greatly appreciated.
EtreCheck version: 2.1.8 (121)
Report generated 21 March 2015 9:41:28 PM AEDT
Download EtreCheck from http://etresoft.com/etrecheck
Click the [Click for support] links for help with non-Apple products.
Click the [Click for details] links for more information about that line.
Hardware Information: ℹ️
    MacBook Pro (15-inch, Mid 2010) (Technical Specifications)
    MacBook Pro - model: MacBookPro6,2
    1 2.4 GHz Intel Core i5 CPU: 2-core
    4 GB RAM
        BANK 0/DIMM0
            2 GB DDR3 1067 MHz ok
        BANK 1/DIMM0
            2 GB DDR3 1067 MHz ok
    Bluetooth: Old - Handoff/Airdrop2 not supported
    Wireless: en1: 802.11 a/b/g/n
    Battery Health: Normal - Cycle count 814
Video Information: ℹ️
    NVIDIA GeForce GT 330M - VRAM: 256 MB
        Color LCD 1440 x 900
        spdisplays_display_connector
    Intel HD Graphics - VRAM: 288 MB
        spdisplays_display_connector
System Software: ℹ️
    Mac OS X 10.6.8 (10K549) - Time since boot: one day 2:7:40
Disk Information: ℹ️
    TOSHIBA MK3255GSXF disk0 : (298.09 GB)
        - (disk0s1) <not mounted> : 210 MB
        Macintosh HD (disk0s2) / : 319.73 GB (150.44 GB free)
    MATSHITADVD-R   UJ-898
USB Information: ℹ️
    Apple Inc. BRCM2070 Hub
        Apple Inc. Bluetooth USB Host Controller
    Apple Internal Memory Card Reader
    Apple Inc. Apple Internal Keyboard / Trackpad
    Apple Computer, Inc. IR Receiver
    Apple Inc. Built-in iSight
Configuration files: ℹ️
    /etc/hosts - Count: 31
Kernel Extensions: ℹ️
        /Library/Application Support/MacKeeper/AntiVirus.app
    [not loaded]    com.zeobit.kext.AVKauth (2.3.3 - SDK 10.8) [Click for support]
    [not loaded]    com.zeobit.kext.Firewall (2.3.3 - SDK 10.8) [Click for support]
        /System/Library/Extensions
    [not loaded]    com.devguru.driver.SamsungComposite (1.2.63 - SDK 10.6) [Click for support]
    [not loaded]    com.leapfrog.codeless.kext (2) [Click for support]
    [not loaded]    com.leapfrog.driver.LfConnectDriver (1.11.1 - SDK 10.10) [Click for support]
    [not loaded]    com.wibu.codemeter.CmUSBMassStorage (1.0.7) [Click for support]
        /System/Library/Extensions/ssuddrv.kext/Contents/PlugIns
    [not loaded]    com.devguru.driver.SamsungACMControl (1.2.63 - SDK 10.6) [Click for support]
    [not loaded]    com.devguru.driver.SamsungACMData (1.2.63 - SDK 10.6) [Click for support]
    [not loaded]    com.devguru.driver.SamsungMTP (1.2.63 - SDK 10.5) [Click for support]
    [not loaded]    com.devguru.driver.SamsungSerial (1.2.63 - SDK 10.6) [Click for support]
Problem System Launch Daemons: ℹ️
    [running]    com.wibu.CodeMeter.Server.plist [Click for support]
    [not loaded]    org.samba.winbindd.plist [Click for support]
Launch Agents: ℹ️
    [not loaded]    com.adobe.AAM.Updater-1.0.plist [Click for support]
    [loaded]    com.adobe.CS5ServiceManager.plist [Click for support]
    [loaded]    com.google.keystone.agent.plist [Click for support]
    [running]    com.hp.devicemonitor.plist [Click for support]
    [loaded]    com.hp.messagecenter.launcher.plist [Click for support]
Launch Daemons: ℹ️
    [loaded]    com.adobe.fpsaud.plist [Click for support]
    [loaded]    com.adobe.SwitchBoard.plist [Click for support]
    [loaded]    com.google.keystone.daemon.plist [Click for support]
    [loaded]    com.leapfrog.connect.authdaemon.plist [Click for support]
    [loaded]    com.microsoft.office.licensing.helper.plist [Click for support]
    [loaded]    com.skype.skypeinstaller.plist [Click for support]
    [running]    com.zeobit.MacKeeper.AntiVirus.plist [Click for support]
User Launch Agents: ℹ️
    [loaded]    com.adobe.AAM.Updater-1.0.plist [Click for support]
    [loaded]    com.adobe.ARM.[...].plist [Click for support]
    [loaded]    com.adobe.ARM.[...].plist [Click for support]
    [running]    com.akamai.single-user-client.plist [Click for support]
    [failed]    com.apple.CSConfigDotMacCert-[...]@me.com-SharedServices.Agent.plist [Click for details]
    [running]    com.leapfrog.connect.monitor.plist [Click for support]
    [running]    com.spotify.webhelper.plist [Click for support]
    [failed]    com.zeobit.MacKeeper.Helper.plist [Click for support] [Click for details]
User Login Items: ℹ️
    LOGINserver    Application (/Library/Printers/Brother/Utilities/Server/LOGINserver.app)
    InstUtilLaunch    Application (/Library/Printers/Brother/Utilities/InstallUtility.app/Contents/Resources/Inst UtilLaunch.app)
Internet Plug-ins: ℹ️
    o1dbrowserplugin: Version: 5.38.6.0 - SDK 10.8 [Click for support]
    OVSHelper: Version: 1.1 [Click for support]
    OfficeLiveBrowserPlugin: Version: 12.2.9 [Click for support]
    net.juniper.DSSafariExtensions: Version: Unknown [Click for support]
    Silverlight: Version: 4.0.60129.0 [Click for support]
    FlashPlayer-10.6: Version: 16.0.0.305 - SDK 10.6 [Click for support]
    DivXBrowserPlugin: Version: 2.1 [Click for support]
    Flash Player: Version: 16.0.0.305 - SDK 10.6 Outdated! Update
    iPhotoPhotocast: Version: 7.0 - SDK 10.7
    googletalkbrowserplugin: Version: 5.38.6.0 - SDK 10.8 [Click for support]
    QuickTime Plugin: Version: 7.6.6
    AdobePDFViewer: Version: 10.0.3 [Click for support]
    SharePointBrowserPlugin: Version: 14.0.0 [Click for support]
    JavaAppletPlugin: Version: 13.9.8 - SDK 10.6 Check version
Safari Extensions: ℹ️
    Searchme [Adware! - Remove]
    DivX Plus Web Player HTML5 <video>
Audio Plug-ins: ℹ️
    iSightAudio: Version: 7.6.6
3rd Party Preference Panes: ℹ️
    Akamai NetSession Preferences [Click for support]
    CodeMeter [Click for support]
    DivX [Click for support]
    Flash Player [Click for support]
    Growl [Click for support]
Time Machine: ℹ️
    Time Machine information requires OS X 10.7 "Lion" or later.
Top Processes by CPU: ℹ️
        14%    firefox
         5%    WindowServer
         0%    ps
         0%    fontd
         0%    DirectoryService
Top Processes by Memory: ℹ️
    528 MB    firefox
    176 MB    Finder
    159 MB    AntiVirus
    112 MB    WindowServer
    82 MB    mds
Virtual Memory Information: ℹ️
    1.07 GB    Free RAM
    1.29 GB    Active RAM
    1.01 GB    Inactive RAM
    784 MB    Wired RAM
    962 MB    Page-ins
    3 MB    Page-outs
Diagnostics Information: ℹ️
    Mar 20, 2015, 07:32:46 PM    Self test - passed

Hardware Information: ℹ️
    MacBook Pro (15-inch, Mid 2010) (Technical Specifications)
    MacBook Pro - model: MacBookPro6,2
    1 2.4 GHz Intel Core i5 CPU: 2-core
    4 GB RAM
        BANK 0/DIMM0
            2 GB DDR3 1067 MHz ok
        BANK 1/DIMM0
            2 GB DDR3 1067 MHz ok
    Bluetooth: Old - Handoff/Airdrop2 not supported
    Wireless: en1: 802.11 a/b/g/n
    Battery Health: Normal - Cycle count 814
***Hardware looks fine
***Increasing the RAM can always help with slowness issues
Video Information: ℹ️
    NVIDIA GeForce GT 330M - VRAM: 256 MB
        Color LCD 1440 x 900
        spdisplays_display_connector
    Intel HD Graphics - VRAM: 288 MB
        spdisplays_display_connector
***Looks fine
System Software: ℹ️
    Mac OS X 10.6.8 (10K549) - Time since boot: one day 2:7:40
***You are running an Operating system over 4 years old but it shouldn't effect the speed of your computer
Disk Information: ℹ️
    TOSHIBA MK3255GSXF disk0 : (298.09 GB)
        - (disk0s1) <not mounted> : 210 MB
        Macintosh HD (disk0s2) / : 319.73 GB (150.44 GB free)
    MATSHITADVD-R   UJ-898
***Looks fine
USB Information: ℹ️
    Apple Inc. BRCM2070 Hub
        Apple Inc. Bluetooth USB Host Controller
    Apple Internal Memory Card Reader
    Apple Inc. Apple Internal Keyboard / Trackpad
    Apple Computer, Inc. IR Receiver
    Apple Inc. Built-in iSight
Configuration files: ℹ️
    /etc/hosts - Count: 31
***Looks fine
Kernel Extensions: ℹ️
        /Library/Application Support/MacKeeper/AntiVirus.app
    [not loaded]    com.zeobit.kext.AVKauth (2.3.3 - SDK 10.8) [Click for support]
    [not loaded]    com.zeobit.kext.Firewall (2.3.3 - SDK 10.8) [Click for support]
        /System/Library/Extensions
    [not loaded]    com.devguru.driver.SamsungComposite (1.2.63 - SDK 10.6) [Click for support]
    [not loaded]    com.leapfrog.codeless.kext (2) [Click for support]
    [not loaded]    com.leapfrog.driver.LfConnectDriver (1.11.1 - SDK 10.10) [Click for support]
    [not loaded]    com.wibu.codemeter.CmUSBMassStorage (1.0.7) [Click for support]
        /System/Library/Extensions/ssuddrv.kext/Contents/PlugIns
    [not loaded]    com.devguru.driver.SamsungACMControl (1.2.63 - SDK 10.6) [Click for support]
    [not loaded]    com.devguru.driver.SamsungACMData (1.2.63 - SDK 10.6) [Click for support]
    [not loaded]    com.devguru.driver.SamsungMTP (1.2.63 - SDK 10.5) [Click for support]
    [not loaded]    com.devguru.driver.SamsungSerial (1.2.63 - SDK 10.6) [Click for support]
***I'm honestly not super familiar with most kernal extensions but I do see you have MacKeeper running which can slow the computer down
****** This next section talks about Launch agents and Launch Daemons.
****Something to keep in mind is that when you first get the computer that all of these folders are empty and the files in them are all third party.
****If you want to see if the system runs better without them Shut the computer down and turn it on while holding the shift key
****This will put the computer into safemode which turns off third party files and extensions and does not let any launch agent/daemons files run.
Problem System Launch Daemons: ℹ️
    [running]    com.wibu.CodeMeter.Server.plist [Click for support]
    [not loaded]    org.samba.winbindd.plist [Click for support]
Launch Agents: ℹ️
    [not loaded]    com.adobe.AAM.Updater-1.0.plist [Click for support]
    [loaded]    com.adobe.CS5ServiceManager.plist [Click for support]
    [loaded]    com.google.keystone.agent.plist [Click for support]
    [running]    com.hp.devicemonitor.plist [Click for support]
    [loaded]    com.hp.messagecenter.launcher.plist [Click for support]
***This is the root launch agent folder
***I'd remove all but the first three
Launch Daemons: ℹ️
    [loaded]    com.adobe.fpsaud.plist [Click for support]
    [loaded]    com.adobe.SwitchBoard.plist [Click for support]
    [loaded]    com.google.keystone.daemon.plist [Click for support]
    [loaded]    com.leapfrog.connect.authdaemon.plist [Click for support]
    [loaded]    com.microsoft.office.licensing.helper.plist [Click for support]
    [loaded]    com.skype.skypeinstaller.plist [Click for support]
    [running]    com.zeobit.MacKeeper.AntiVirus.plist [Click for support]
***This is the root Launch Daemons folder
***I'd only keep com.adobe.fpsaud.plist and com.microsfot.office.licensing.helper.plist all the others will reinstall them selves if needed.
User Launch Agents: ℹ️
    [loaded]    com.adobe.AAM.Updater-1.0.plist [Click for support]
    [loaded]    com.adobe.ARM.[...].plist [Click for support]
    [loaded]    com.adobe.ARM.[...].plist [Click for support]
    [running]    com.akamai.single-user-client.plist [Click for support]
    [failed]    com.apple.CSConfigDotMacCert-[...]@me.com-SharedServices.Agent.plist [Click for details]
    [running]    com.leapfrog.connect.monitor.plist [Click for support]
    [running]    com.spotify.webhelper.plist [Click for support]
    [failed]    com.zeobit.MacKeeper.Helper.plist [Click for support] [Click for details]
***This is your users Launch Agent folder
***I'd remove everything here
User Login Items: ℹ️
    LOGINserver    Application (/Library/Printers/Brother/Utilities/Server/LOGINserver.app)
    InstUtilLaunch    Application (/Library/Printers/Brother/Utilities/InstallUtility.app/Contents/Resources/Inst UtilLaunch.app)
Internet Plug-ins: ℹ️
    o1dbrowserplugin: Version: 5.38.6.0 - SDK 10.8 [Click for support]
    OVSHelper: Version: 1.1 [Click for support]
    OfficeLiveBrowserPlugin: Version: 12.2.9 [Click for support]
    net.juniper.DSSafariExtensions: Version: Unknown [Click for support]
    Silverlight: Version: 4.0.60129.0 [Click for support]
    FlashPlayer-10.6: Version: 16.0.0.305 - SDK 10.6 [Click for support]
    DivXBrowserPlugin: Version: 2.1 [Click for support]
    Flash Player: Version: 16.0.0.305 - SDK 10.6 Outdated! Update
    iPhotoPhotocast: Version: 7.0 - SDK 10.7
    googletalkbrowserplugin: Version: 5.38.6.0 - SDK 10.8 [Click for support]
    QuickTime Plugin: Version: 7.6.6
    AdobePDFViewer: Version: 10.0.3 [Click for support]
    SharePointBrowserPlugin: Version: 14.0.0 [Click for support]
    JavaAppletPlugin: Version: 13.9.8 - SDK 10.6 Check version
Safari Extensions: ℹ️
    Searchme [Adware! - Remove]
    DivX Plus Web Player HTML5 <video>
***The first extension in safari is adware and can be uninstalled
***The second one is a video web player and you could probably remove that as well but it wont effect your speed
Audio Plug-ins: ℹ️
    iSightAudio: Version: 7.6.6
3rd Party Preference Panes: ℹ️
    Akamai NetSession Preferences [Click for support]
    CodeMeter [Click for support]
    DivX [Click for support]
    Flash Player [Click for support]
    Growl [Click for support]
Time Machine: ℹ️
    Time Machine information requires OS X 10.7 "Lion" or later.
Top Processes by CPU: ℹ️
        14%    firefox
         5%    WindowServer
         0%    ps
         0%    fontd
         0%    DirectoryService
Top Processes by Memory: ℹ️
    528 MB    firefox
    176 MB    Finder
    159 MB    AntiVirus
    112 MB    WindowServer
    82 MB    mds
Virtual Memory Information: ℹ️
    1.07 GB    Free RAM
    1.29 GB    Active RAM
    1.01 GB    Inactive RAM
    784 MB    Wired RAM
    962 MB    Page-ins
    3 MB    Page-outs
Diagnostics Information: ℹ️
    Mar 20, 2015, 07:32:46 PM    Self test - passed
***Everything else seems fine

What Are the Exact Basic rules for Replying a Thread...... -:) @};-

Hi Experts,
After Looking into the forums many days I had a small conclusion about forums,
SAP Forums are better place I have seen for getting a goo dhelp & Knowledge...
Why can't we make it a BEST Place.
This is just a small doubt which I would like to clear myself first,
I have seen many users In the forums asking for a Basic Questions
When cleared, But still they want to have a Spoon feeding with a Sample Code.
When Sample Code Given they will provide the original code and requests for Modifications.
These always looks to me as crazy.
I have seen somelong time agin by moderators posting that In SCN there will be no SPOON FEEDING.
I am not sure whether if still this Rule AVAILABLE or NOT.
Ok if the task is really difficult let them ask again and again,
And it was not replied, let them repost, I agree with them.
And How about a User Registered in SDN very long back and asking for a silly question in below thread,
[Sendin Email to the recipent list -Need correct FM |Getting the address from shipto partner of Bil. item not directly from C.ma]
This is one more example, really funny, The thread poster needs the solution at any cost, he doesn't require and Suggetions,,, {He Only needs Solution}
[Radio Buttons |Radio Buttons;
[Turning Off Debugger |Turning Off Debugger;
[Regarding Amount in words|Regarding Amount in words;
There are 100's of threads like this....Everyone knows this facts.
Check this who answered this one and who replied correct answer, who copied, finally who was rewarded...!
[how to validate POsting period |Re: how to validate POsting period]
Now My Real Problem is....!
User is always intelligent, Only the weakness is in Contributor, trying to help them,..,
And I openly say that Someone requesting for basic help is not DUMB, But the Contributor replying forgets
the basic rules " Why Contributing ?"
According to me It's not the Requestor to see Rules & Requlations before posting the threads,
But its responsibilty for the Contributing person to see th Rules & Requlations before replying the threads,
If we follow the rules and stand on a single word or rule or anything there will be Good Result.
Major Problem is in US not anyone else.
Example Some one saying search in the forum,,, then please no replies after that...
But we are very pity hearted again we post the solution,,,
But it is not at all enough(for cintribtor's)... they will copy the solution and post again by slight Modifications,
And Some users are having 500,600,700,800 Posts with 0 points, registered long long back.
They are completly dependent on forums,,, As they goto office and as they eat, The same they open forums and ask Queries...
They will never realize what they are doing,, and we will never let them improve better...
Finally Lets Discuss About this and Correct & Suggest me if I am wrong,
Is my thoughts are going in the right way or not I am not even sure... Please Aslo Correct me if I did any mistakes.
Thanks & regards,
Dileep .C
Edited by: Dileep Kumar Chinnaiah on Apr 29, 2009 12:33 PM
Title Changed Form
"What to do when someone asking for Basic Questions" to "What Are the Exact Basic rules for Replying a Threads...... "

Hi Stephen,
Very useful Information,
First tell me a little something about my self...
After completion of my certification(as a fresher) I was down the streets hunting the job,
with the insufficient knowledge and being a non-experienced person, I never got one.
And mean while when I got my "S-UserID", I used to be proud, To say frankly, I registerd in SDN & SAP all at a time, without even knowing what I can do there..,
When I got a job afterwords I was doing the job and never seen SDN page for many months,
when I came to know that of we have doubts we can post at SDN. then started requesting help,
I posted only a little, I didnot got the proper response. on that day I decided,
still there are some places where we cannot get help on time and there will be people waiting to get help,
Why cant I put some of my efforts to help others.
Then I searched some topic by Topic in SDN topic by Topic I used to read threads just for knowledge.
when I feel my self comfort for contributing, I started contibuting...!
If you haven't read it, take a look first, so you can understand where things are now.
I dont know where things are now. But these in this thread I mentioned clearly what I seen from the day I started contributing.
I searched with the terms of 'Rules for replying', The results are not as I expected, and this link has subject as
"O SDN, where art thou?" So it dosent hit my in the list.
Like everybody until a certain stage I am also rushing for points.
But I most cases I never tried to copy paste answers. If I done some then that is just to point it myself some day,
I have no hopes or no intrest on the points...! This was discussed with Rob & Matt, at my inital contribution where my points are 36.
From that day till date I have changed a lot to myself.
Everyone cannot change like me because they are not like me & And I dont even expect that...!
I will be online almost 6-8Hrs a day, Not even getting intrest to see the forums just because of the co-contributors.
My only point is I am just requesting to a co-contributor,
Clearly In a example : Lets say contributor has replied to a thread, and if you know that is a correct solution,
please dont reply any more, If you have a better solution than that, then only reply,
Even there is one reply in the thread not a matter, if correct answer leave that query.
If still error persists, Show up with your Idea's...
Dont let down the contributor, by copying his reply and editing and pasting(edit only if incorrect).
I am just looking for this one exactly to circulate between ourselfs.
For this we a little support from moderators to circulate(may be as a rule or may be as a mail to them)
You may say again how many mails we have to send, It dosent matter, one mail to one person one time,
and +ve factors will show up definetly.
A real contributor always understand what I am talking about, but some one who hunts for points will never.
I am really sorry if I am troubling with my doubts & requests,
If so, Pleae forgive me,,
Thanks & regards,
Dileep .C

When using mail icon i get a blank screen with No message selected on the RH side. Top left is the word thread in black . all other buttons are greyed out except the send new mail one. Cna anyone help?

Email does not appear when using the mail icon on the home screen. I get No message selected showing on the rh side of my screen with the left hand third of the screen blank. Buttons on the top line are greyed out except the new mail one. The word thread appears in black on the top left hand side of the screen The only way out is to close the screen. all other apps work okay.

Hello calverone,
Thanks for using Apple Support Communities.
To start troubleshooting this issue where the Mail application is not appearing correctly on your iPad, I'd like you to please force the Mail app to quit, and then restart your iPad.
iOS: Force an app to close
Turn your iOS device off and on (restart) and reset
Have a great weekend,
Alex H.

Why are the threads start and terminate randomly?

Hi there,
I got the program below. I am wondering why are the threads start and terminate randomly? Everytime, I run the program, it produces different results.
I know that these four threads have got same normal priority (should be 5), and under windows there is something called timeslice. Then these four threads rotate using this timeslice. How do we know what exactly the timeslice is in seconds? If the timeslice is fix, then why the results are ramdom?
Thanks in advance!
* To change this template, choose Tools | Templates
* and open the template in the editor.
package mythreadone;
* @author Administrator
public class MyThreadOne implements Runnable {
String tName;
Thread t;
MyThreadOne(String threadName) {
tName = threadName;
t = new Thread(this, tName);
t.start();
public void run() {
try {
System.out.println("Thread: " + tName);
Thread.sleep(2000);
} catch (InterruptedException e) {
System.out.println("Exception: Thread "
+ tName + " interrupted");
System.out.println("Terminating thread: " + tName);
public static void main(String args[]) {
// Why are the threads start and terminate randomly?
new MyThreadOne("1");
new MyThreadOne("2");
new MyThreadOne("3");
new MyThreadOne("4");
try {
Thread.sleep(10000);
// Thread.sleep(2000);
} catch (InterruptedException e) {
System.out.println(
"Exception: Thread main interrupted.");
System.out.println(
"Terminating thread: main thread.");
1. Firstly, I set in the main function:
Thread.sleep(10000);
and I run the program it gives:
Thread: 1
Thread: 4
Thread: 2
Thread: 3
Terminating thread: 1
Terminating thread: 3
Terminating thread: 4
Terminating thread: 2
Terminating thread: main thread.
BUILD SUCCESSFUL (total time: 10 seconds)
Run it again, it gives:
Thread: 2
Thread: 4
Thread: 3
Thread: 1
Terminating thread: 2
Terminating thread: 1
Terminating thread: 3
Terminating thread: 4
Terminating thread: main thread.
BUILD SUCCESSFUL (total time: 10 seconds)
And my question was why it outputs like this? It suppose to be:
Thread: 1
Thread: 2
Thread: 3
Thread: 4
Terminating thread: 1
Terminating thread: 2
Terminating thread: 3
Terminating thread: 4
Terminating thread: main thread.
BUILD SUCCESSFUL (total time: 10 seconds)
Why these four threads start and finish randomly each time I run the program? I use Windows, suppose there is a timeslice (i.e. 1 second), these threads have the same priority. Then the threads should start and finish in turn one by one. Am I right?
2. My second question is:
When I change the codes in the 'main' function into:
Thread.sleep(10000); -> Thread.sleep(2000);
it gives me the results like:
Thread: 1
Thread: 4
Thread: 3
Thread: 2
Terminating thread: main thread.
Terminating thread: 1
Terminating thread: 4
Terminating thread: 3
Terminating thread: 2
BUILD SUCCESSFUL (total time: 2 seconds)
Run it again:
Thread: 1
Thread: 2
Thread: 3
Thread: 4
Terminating thread: 3
Terminating thread: main thread.
Terminating thread: 4
Terminating thread: 2
Terminating thread: 1
BUILD SUCCESSFUL (total time: 2 seconds)
I tried several times. The main thread always terminates before or after the first child thread finished.
My question is why it doesn't output something like:
Thread: 1
Thread: 2
Thread: 3
Thread: 4
Terminating thread: 3
Terminating thread: 4
Terminating thread: 2
Terminating thread: main thread.
Terminating thread: 1
BUILD SUCCESSFUL (total time: 2 seconds)
or
Thread: 1
Thread: 2
Thread: 3
Thread: 4
Terminating thread: 3
Terminating thread: 4
Terminating thread: 2
Terminating thread: 1
Terminating thread: main thread.
BUILD SUCCESSFUL (total time: 2 seconds)

user13476736 wrote:
Yes, my machine has multi-core. Then you mean that if I got a one core machine the result should always be:
Thread: 1
Thread: 2
Thread: 3
Thread: 4
Terminating thread: 1
Terminating thread: 2
Terminating thread: 3
Terminating thread: 4
Terminating thread: main thread.
BUILD SUCCESSFUL (total time: 10 seconds)
???No.
>
How to explain my second quesiton then? Why the main thread always terminates before some of the child threads end? Thanks a lot.

Where the posted threads are stored

Hi All,
Where the posted threads are stored. In which repository i is storing.
Regards
Krishnamurthy K

Hi,
You can read the documentation about [Content Management Configuration|http://help.sap.com/saphelp_nw70/helpdata/EN/69/d96b7aa84611d5993600508b6b8b11/frameset.htm] , where you can find a lot of information about [Repository Managers |http://help.sap.com/saphelp_nw70/helpdata/EN/69/d96b7da84611d5993600508b6b8b11/frameset.htm] .
Repositories are used for storing and/or retrieving content and metadata.
The KM standard configuration uses several internal repositories that are controlled by CM. They are used for storing and staging various content and metadata and for navigating in this data. These repositories are preconfigured and preactivated in the KM standard configuration. You do not normally need to modify their configuration.
In addition to the aforementioned internal repositories, you can integrate additional external repositories into CM, such as a WebDAV or file system repository. You can establish a connection to these repositories by configuring appropriate repository managers.
Regards,
Lubi
*Hope it will be helpful for you.

Do property updates and listeners have to be on the JavaFX thread?

I understand that accessing the scene graph has to be done on the JavaFX thread. But do property setting, getting and listening for changes, and manipulation of observable lists have to be on that JavaFX thread too? I presume the answer is no.
For example if I have an ObservableList can I manipulate it in a program which doesn't use the scene graph at all, so basically using it just for it's event management?

The FX properties, bindings and collections have a potentially wide range of unexplored applications outside of JavaFX scene graph processing.
do property setting, getting and listening for changes, and manipulation of observable lists have to be on that JavaFX thread too?No.
You can manipulate properties off the JavaFX thread if they are:
- properties you have defined yourself and the properties are not bound to anything that would affect a currently displayed scene graph or a property of anything in such a scene graph.
- properties of scene graphs which are not currently displayed.
For example if I have an ObservableList can I manipulate it in a program which doesn't use the scene graph at all.Yes.
The examples here demonstrate this (they use the main thread in programs which have no scene graph) =>
http://docs.oracle.com/javafx/2.0/binding/jfxpub-binding.htm
http://docs.oracle.com/javafx/2.0/collections/jfxpub-collections.htm

When I try to delete message threads on my iPhone 5, the message app won't work until I restart my phone. Once it restarts, the message threads that I tried to delete are still there. Any advice?

When I try to delete message threads on my iPhone 5, the message app won't work until I restart my phone. Once it restarts, the message threads that I tried to delete are still there. Any advice?

I recently spoke to someone from Apple support, and here's what I gathered:
"Older" phones (read: anything iPhone 4s or older?) sometimes have trouble keeping up with the processing demands of the newest software. When deleting threads with a lot of media (photos, videos, etc), it can take a lot of processing to successfully delete. What this support tech suggested was picking some of the bigger threads at night before you go to bed, deleting them, and then leaving the phone alone-- and plugged in-- overnight to give it enough time to delete everything. He suggested not even pressing the lock button; just leave it to process (though I imagine the screen will lock on its own anyway).
Not sure if it works yet since I just spoke to him, but it's the closest thing I've got to a solution!

What are the top 20 most viewed threads on the forums?

Is there a way to search to find the most viewed threads?
I'm curious if I have missed anything good as well as just being curious after all of this time, which threads got the most milage.
Ben
Ben Rayner
I am currently active on.. MainStream Preppers
Rayner's Ridge is under construction
Solved!
Go to Solution.

Ben wrote:
Is there a way to search to find the most viewed threads?
just being curious after all of this time, which threads got the most milage.
Ben,
If we do a search on the forum with nothing as keyword, we can get all the threads in this forum listed. Sorting by Replies will display (and offfcourse display 50 threads per page - oops that's the maximum....) and we have to look what we want. This is pretty vague technique. These are the top 3 threads.
1) Rube Goldberg code
2) 第2届LabVIEW专家组竞赛获奖程序下载 (Chinese board - 2nd LabVIEW Group Contest Awards Program Download)
3) Oscilloscope project (Our favorite JLV - one man army - Managed to take care throughout this whole thread)
Thanks,
Mathan

Are the APIs of java.swing.Timer thread-safe?

As the title.

They are safe for use with the event thread, as the actionPerformed method is invoked on the event thread,
so you can make UI changes from your actionPerformed without fear.
That is their only thread-related-ness, so other than that, I would think they are not thread safe in general.
: jay

Multiple threads but they are using the same thread ID

I'm a newbie in Java programming. I have the following codes, please take a look and tell me what wrong with my codes: server side written in Java, client side written in C. Please help me out, thanks for your time.
Here is my problem: why my server program assigns the same thread ID for both threads???
.Server side: start server program
.Client side: set auto startup in /etc/rc.local file in a different machine, so whenever this machine boots up, the client program will start automatically.
==> here is the result with 2 clients, why they always come up the same thread ID ????????
Waiting for client ...
Server thread 1024 running
Waiting for client ...
Server thread 1024 running
But if I do like this, they all work fine:
.Server side: start server program
.Client side: telnet or ssh to each machine, start the client program
==> here is the result:
Waiting for client ...
Server thread 1024 running
Waiting for client ...
Server thread 1025 running
server.java file:
import java.io.*;
import java.net.*;
import java.awt.*;
import java.util.Hashtable;
import java.util.Enumeration;
import java.util.regex.Pattern;
import java.util.Date;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.text.*;
public class Server extends Frame implements Runnable
private ServerThread clients[] = new ServerThread[50];
private ServerSocket server = null;
private Thread thread = null;
private int clientCount = 0;
//some variables over here
public Server(int port)
//GUI stuffs here
//network stuff
try
System.out.println("Binding to port " + port + ", please wait ...");
server = new ServerSocket(port);
System.out.println("Server started: " + server);
start();
catch(IOException ioe)
System.out.println("Can not bind to port " + port + ": " + ioe.getMessage());
public boolean action(Event e, Object arg)
//do something
return true;
public synchronized void handle(int ID, String input)
//do something
public synchronized void remove(int ID)
int pos = findClient(ID);
if (pos >= 0)
//remove a client
ServerThread toTerminate = clients[pos];
System.out.println("Removing client thread " + ID + " at " + pos);
if (pos < clientCount-1)
for (int i = pos+1; i < clientCount; i++)
clients[i-1] = clients;
clientCount--;
try
{ toTerminate.close(); }
catch(IOException ioe)
{ System.out.println("Error closing thread: " + ioe); }
toTerminate.stop();
private void addThread(Socket socket)
if (clientCount < clients.length)
clients[clientCount] = new ServerThread(this, socket);
try
clients[clientCount].open();
clients[clientCount].start();
clientCount++;
catch(IOException ioe)
System.out.println("Error opening thread: " + ioe);
else
System.out.println("Client refused: maximum " + clients.length + " reached.");
public void run()
while (thread != null)
try
{ System.out.println("Waiting for a client ...");
addThread(server.accept());
catch(IOException ioe)
System.out.println("Server accept error: " + ioe); stop();
public void start()
if(thread == null)
thread = new Thread(this);
thread.start();
public void stop()
if(thread != null)
thread.stop();
thread = null;
private int findClient(int ID)
for (int i = 0; i < clientCount; i++)
if (clients[i].getID() == ID)
return i;
return -1;
public static void main(String args[])
Frame server = new Server(1500);
server.setSize(650,400);
server.setLocation(100,100);
server.setVisible(true);
ServerThread.java file
import java.net.*;
import java.io.*;
import java.lang.*;
public class ServerThread extends Thread
private Server server = null;
private Socket socket = null;
private int ID = -1;
InputStreamReader objInStreamReader = null;
BufferedReader objInBuffer = null;
PrintWriter objOutStream = null;
public ServerThread(Server server, Socket socket)
super();
server = _server;
socket = _socket;
ID = socket.getPort();
public void send(String msg)
objOutStream.write(msg);
objOutStream.flush();
public int getID()
return ID;
public void run()
System.out.println("Server thread " + ID + " running");
while(true)
try{
server.handle(ID,objInBuffer.readLine());
catch(IOException ioe)
System.out.println(ID + "Error reading: " + ioe.getMessage());
//remove a thread ID
server.remove(ID);
stop();
public void open() throws IOException
//---Set up streams---
objInStreamReader = new InputStreamReader(socket.getInputStream());
objInBuffer = new BufferedReader(objInStreamReader);
objOutStream = new PrintWriter(socket.getOutputStream(), true);
public void close() throws IOException
if(socket != null) socket.close();
if(objInStreamReader != null) objInStreamReader.close();
if(objOutStream !=null) objOutStream.close();
if(objInBuffer !=null) objInBuffer.close();
And client.c file
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h> /* close */
#include <time.h>
#define SERVER_PORT 1500
#define MAX_MSG 100
//global variables
long lines = 0;
int sd = 0;
char command[100];
time_t t1,t2;
double timetest = 0.00;
int main (int argc, char *argv[])
int rc, i = 0, j = 0;
struct sockaddr_in localAddr, servAddr;
struct hostent *h;
char buf[100];
FILE *fp;
h = gethostbyname(argv[1]);
if(h==NULL) {
printf("unknown host '%s'\n",argv[1]);
exit(1);
servAddr.sin_family = h->h_addrtype;
memcpy((char *) &servAddr.sin_addr.s_addr, h->h_addr_list[0], h->h_length);
servAddr.sin_port = htons(SERVER_PORT);
/* create socket */
sd = socket(AF_INET, SOCK_STREAM, 0);
if(sd<0) {
perror("cannot open socket ");
exit(1);
/* bind any port number */
localAddr.sin_family = AF_INET;
localAddr.sin_addr.s_addr = htonl(INADDR_ANY);
localAddr.sin_port = htons(0);
rc = bind(sd, (struct sockaddr *) &localAddr, sizeof(localAddr));
if(rc<0) {
printf("%s: cannot bind port TCP %u\n",argv[1],SERVER_PORT);
perror("error ");
exit(1);
/* connect to server */
rc = connect(sd, (struct sockaddr *) &servAddr, sizeof(servAddr));
if(rc<0) {
perror("cannot connect ");
exit(1);
//send register message
rc = send(sd, "register\n", strlen("register\n"), 0);
//if can't send
if(rc < 0)
close(sd);
exit(1);
//wait here until get the flag from server
while(1)
buf[0] = '\0';
rc = recv(sd,buf,MAX_MSG-1,0);
if(rc < 0)
perror("receive error\n");
close(sd);
exit(1);
buf[rc] = '\0';
if(strcmp(buf,"autoplay")==0)
//do something here
else if(strcmp(buf,"exit")==0)
printf("exiting now ....\n");
close(sd);
exit(1);
return 0;

Yes......I do so all the time.

Multi-Thread Slot Machine (Threads are the problem)

I am trying to make a slot machine with two threads. One sleeps for a little while after changing the symbols (to simulate the spinning) and then that thread yields to the higher priority main thread which should update the GUI. However, the second thread runs then stops itself like it should. However, it then restarts itself before the main thread gets to execute to update the GUI so I added repaint() and revalidate() to the second thread as well. However, nothing happens. The icons (symobls) do not even change when the second thread finishes.
The link below is to the zip file containing my project.
http://www.mediafire.com/?jty9mdmndmu
Any help would be appreciated.
Thanks in advance.

This is a great article too: [Concurrency in Swing|http://java.sun.com/docs/books/tutorial/uiswing/concurrency/index.html]

Can I modify a table model outside of the event thread if it's not seen?

I have a JTable that I use to display several table models (I'm extending DefaultTableModel); I switch between the models using JTable.setModel.
If model A is active and currently being viewed, I of course make sure any updates are done using SwingUtilities.invokeLater().
My question is: Can I modify an "inactive" table, say table B, without using invokeLater(), for example B.setValueAt() etc.

Isn't a model connected to an instance by JTable.setModel()? (Or by passing the model as a parameter in new JTable()) Yea. I meant connected to a JTable's UI. Or more specifically, listeners are installed on the model.
if data is changing and the user is not currently viewing that data, I want to change the table model in another threadI would argue that this is thread safe:
1) When a table becomes 'inactive' (not showing in any way) then you set the model to some static empty one.
table.setModel(EMPTY_MODEL);This should happen on the EventDispatchThread. Setting the model to the empty one will uninstall all the listeners on the actual model.
2) Freely modify the table's actual model in another Thread.
3) When the table is about to become 'active', then you set the model back to the original one.
table.setModel(originalModel);This should happen on the EventDispatchThread. In particular, the other thread should execute it with an invoke later. That way, proper synchronization occurs and the EDT sees all the changes made to the original model.

What are the critical points to validate whether the client uses PP or not?

Hi,
We are woking for a project which involves more than 80 SAP instances (80 clients), and with in the same instance we have more than one country (e.g: client 100 may have 5 countries india, srilanka, bangaladesh, china and singapore). Now our challenge is to validate which are the countries using SAP PP Shop floor control activities (Creation of Production orders, settlement etc...). Please list the critical points against which we can validate. Hope my question is clear. Any clarification required please reply to this thread. Expecting quick response from the experts. Thank you.
Note: I have tried using "workscheduling view" of material master, COOIS report etc.., still i did not get clear validation. I would appreciate if experts provide technical validation points.
BR
Raam

Dear Krishnan,
First thing is you have to know whether client is using
Discrete , REM or PP-PI
From Discrete point of View ( Configurations )
Check in
OPJH, OPL8, OPKJ, OPK4, OPKP ( whether for plant & order type combination parameters are maintained are not )
Coming to REM
check in OSP2, whether REM profile settings are maintained for the plants
Coming to Master data
just refer the below link & check give the plant as input
[Tables;
Regards
kumar

Blue Screens of Death - what can be the common thread

Whenever I use any PPC app on my system (running Snow Leopard 10.6.1) I get constant blue screen crashes. I've entered multiple bugs on Apple's bugreporter system about this.
Most of the crashes to date have occurred in a routine called UCKeyTranslate. Anyone can with ease determine if this is where your crash occurred. When you get the blue screen, open the Console App (in Utilities), make sure you have the list of files to examine on the left (Make sure toolbar button "Show Log List" is clicked on. Open the "System Diagnostic Reports" list, and see if there is a WIndowServer... entry at the bottom - if so click on it. About two lines down you should see something like this:
Thread 0 Crashed: Dispatch queue: com.apple.main-thread
0 ...ple.CoreServices.CarbonCore 0x00007fff8735d2a6 UCKeyTranslate + 464
The first line after "Crashed" is the key - here you can see the UCKeyTranslate. Now, I know this is where the windowserver crashed.
If you see that. now click on system.log - its under the FILES container in the left list. In the search field enter UCKeyTranslate - if you see many entries, then you have this Carbon problem. People not having crashes don't have these error messages.
There are tens of threads here on this problem - but no solutions. This begs the questions - why do some people get the problem, and others not?
If you are having the problem (or even if you are not), one thought is use of non-Apple keyboards. I have two USB keyboards I use (one at work, one home. [However, I have had the blue screens using the MacBook Pro in laptop mode too, but the system was "exposed" to my keyboards first.]
So, my questions:
- do you get crashes just using a laptop, where you NEVER plugged in a "foreign" keyboard?
- do you get crashes using just Apple keyboards?
- do you NOT get crashes using PPC apps (like Excel 2004 or Eudora) and have a "foreign" keyboard?
Anyone have a good idea of an additional question to add, go for it! The problematic systems MUST have some file or resource hidden somewhere that is causing the problem - if we can find it we can get a workaround. Apple does not seem to be in any hurry to provide a work around or a fix...
David

Although the WindowServer crashes have only happened to me when I have a Apple (non-extended, USB) keyboard connected, I occasionally (only rarely now) use
http://pfuca-store.stores.yahoo.net/haphackeylit1.html
(In fact, I have two HH keyboards and at least one Apple USB keyboard).
Is there a way to remove a keyboard driver from OS X 10.6.1 ?

Are the listeners threads?

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