Related to Thread.

Hello everbody,
This a a part of my application code. There is a return statement, what I want is to view the value of the 'dWord' before returning, I know this is not possible with the code and I know I have to use Thread.sleep() for the purpose so that to stop the execution of the program for some period of time. Can you please tell me what to do and how to do it?
      GenerateUrlBean sp = (GenerateUrlBean)form;
                  sp.seturl(dWord);
                  System.out.println("The generated Url is:"+dWord);
                return mapping.findForward("success");
            Please advice,
Thank you

Whatever w = mapping.findForward("success");
System.out.println(w);
return w;

Similar Messages

Problem with threads in my swing application

Hi,
I have some problem in running my swing app. Thre problem is related to threads.
What i am developing, is a gui framework where i can add different pluggable components to the framework.
The framework is working fine, but when i press the close action then the gui should close down the present component which is active. The close action is of the framework and the component has the responsibility of checking if it's work is saved or not and hence to throw a message for saving the work, therefore, what i have done is that i call the close method for the component in a separate thread and from my main thread i call the join method for the component's thread.But after join the whole gui hangs.
I think after the join method even the GUI thread , which is started for every gui, also waits for the component's thread to finish but the component thread can't finish because the gui thread is also waiting for the component to finish. This creates a deadlock situation.
I dont know wht's happening it's purely my guess.
One more thing. Why i am calling the component through a different thread, is because , if the component's work is not saved by the user then it must throw a message to save the work. If i continue this message throwing in my main thread only then the main thread doesnt wait for user press of the yes no or cancel button for saving the work . It immediately progresses to the next statement.
Can anybody help me get out of this?
Regards,
amazing_java

For my original bad thread version, I have rewritten it mimicking javax.swing.Timer
implementation, reducing average CPU usage to 2 - 3%.
Will you try this:
import javax.swing.*;
import java.awt.*;
import java.text.*;
import java.util.*;
public class SamurayClockW{
JFrame frame;
Container con;
ClockTextFieldW ctf;
public SamurayClockW(){
    frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    con = frame.getContentPane();
    ctf = new ClockTextFieldW();
    con.add(ctf, BorderLayout.SOUTH);
    frame.setBounds(100, 100, 300, 300);
    frame.setVisible(true);
    ctf.start();
public static void main(String[] args){
    new SamurayClockW();
class ClockTextFieldW extends JTextField implements Runnable{
String clock;
boolean running;
public ClockTextFieldW(){
    setEditable(false);
    setHorizontalAlignment(RIGHT);
public synchronized void start(){
    running = true;
    Thread t = new Thread(this);
    t.start();
public synchronized void stop(){
    running = false;
public synchronized void run(){
    SimpleDateFormat sdf = new SimpleDateFormat("HH:mm:ss");
    try{
      while (running){
        clock = sdf.format(new Date());
        SwingUtilities.invokeLater(new Runnable(){
          public void run(){
            setText(clock);
        try{
          wait(1000);
        catch (InterruptedException ie){
          ie.printStackTrace();
    catch (ThreadDeath td){
      running = false;
}

Mail app no longer groups threads after turning Push to off

Hey guys,
My Mail application was grouping related emails/threads together. Yesterday I decided to switch to Fetch as opposed to Push to conserve battery life in general (which it DEFINITELY makes a huge difference in battery life for fetch every 15 minutes versus Push). Any idea what's happening here? I've made sure that the option to group related male is enabled in the Mail settings.
Thanks!

I Don't know if the app will stay open long enough to delete the email, but have you tried that?. If you can get to the draft in the preview window on the left side, swipe across the email from right to left to get the delete button to pop up. Then delete the email. I assume, as I'm sure you do by know, that one of the photos is corrupt, or something in that particular draft is causing the problems.
IF your email account is an IMAP Account, use a computer and log into your email in a browser and delete the email from there. IMAP email accounts actions will sync across devices, so that will remove it from the mail app on the iPad as well.

Question on threading in Java Pet Store

In the Java Pet Store, the MainServlet pulls the RequestProcessor and ScreenFlowManager objects from the ServletContext object. Once returned, the request is processed by methods in these objects. Since the ServletContext object and the objects that it contains are considered not to be thread-safe, how does the utilization of these shared objects not cause thread issues? Thanks for your help.

These objects are used in a read-only fashion, hence there should be no problems related to thread-safety.

Hogging thread

I'm running a WLP 9.2 cluster and on some of the nodes I have an high number of Hogging Threads (over 150).
This is naturally reflected on the "Pending User Request Count" that oscillates from 5 to 50, impacting the portal performances.
I understand that a Hogger thread is a thread that is almost STUCK and Weblogic uses this value for self tuning the thread pool (eg. increasing the numbers of threads). Is that correct?
A thread dump gives me a lot (79) of cluster related STUCK threads. Why is the MulticastSender thread BLOCKED?
"[STUCK] ExecuteThread: '127' for queue: 'weblogic.kernel.Default (self-tuning)'" waiting for lock weblogic.cluster.MulticastSender@10f36f4 BLOCKED
                 weblogic.cluster.MulticastSender.send(MulticastSender.java:156)
                    com.bea.p13n.cache.internal.system.SystemCacheManager.flushCluster(SystemCacheManager.java:155)
                    com.bea.p13n.cache.CacheManager.flushAll(CacheManager.java:81)
                    com.bea.content.repo.internal.server.common.CacheHelper.flushNodeCacheEntry(CacheHelper.java:495)
                 com.bea.content.repo.internal.server.logic.NodeOpsLogic.getProperties(NodeOpsLogic.java:665)
                 com.bea.content.repo.internal.server.bean.NodeOpsBean.getProperties(NodeOpsBean.java:332)
                 com.bea.content.repo.internal.server.bean.RepoNodeOps_ehgg7y_ELOImpl.getProperties(RepoNodeOps_ehgg7y_ELOImpl.java:404)
                 com.bea.content.repo.internal.client.common.Node.getProperties(Node.java:225)
                 com.bea.content.spi.internal.NodeOpsImpl.getProperties(NodeOpsImpl.java:452)
                 com.bea.content.Node.getProperties(Node.java:618)
                 com.bea.content.Node.getProperty(Node.java:558)
                 cm.common.BEACacheManager.findValue(BEACacheManager.java:123)
                 com.stc.cws.taglib.BEAMessageTag.doStartTag(BEAMessageTag.java:91)
                 jsp_servlet._framework._skeletons._stconline.__footer._jsp__tag4(__footer.java:292)
                 jsp_servlet._framework._skeletons._stconline.__footer._jspService(__footer.java:249)
                 weblogic.servlet.jsp.JspBase.service(JspBase.java:34)
...Thanks
Luciano

Maybe you need to increase the size of the JVM as well, WebLogic have a way to use Garbage Collector inline using WLST or console, have you try this??
Regards

Finding a Thread by number corresponding to posts in the thread

I apologize for my lack of forum expertise and hope this is a valid question that maybe others have had.
I posted a thread recently and along with the answers in the forum I also got an 2 emails with a corresponding numbers for the posts in the thread. Same Thread but 2 different numbers one corresponding to Nealeh and the other corresponding to Bill Hunt. When I followed the numbered links they took me directly to the Thread and their respective posts. So I discovered that by simply typing a number in the search box it would take me directly to the post of each person and their answer.
For example: 2629977. Thanks for your suggestion Bill and I will check on Muvipix again. I already registered a while back and looked at some of Steves' tutorials on PE7. Fast and furious and he made it look easy.
You guys provide direct links to posts in other threads (through your highlighted Blue links) that might be related to the one currently on screen. Works great. I usually scroll up to the top and read the whole other post to see if related to problems I might have. The question I have is how do I find these numbers related to Threads and/or posts in a certain Thread. I could then take a number and write it on my notepad with the subject matter and when I go back into the form looking for a particular item I just type a number in the searchbox.
If this is already covered somewhere I aplogize again. I typed various things in the search box and didn't see it. Please direct me if I missed it. Thanks for your help.

Each thread has a reply number. This thread will have the number '1' as I am the first responder. If you hover your mouse over a reply number you will see a link in the status bar like "http://forums.adobe.com/message/2634291#2634291". The digits at the end of that link (2634291) is the number you are after. Steve will like this example .
Cheers,
Neale
Insanity is hereditary, you get it from your children

Mail's "Hide Related Messages" doesn't stick?

I recently upgraded to Mountain Lion and am now running into an issue that I haven't found any information on.
In Mail I often open up an email into a new window if I'll be referring to it often. With Mountain Lion it defaults this to the "Show Related Messages" view with that white message over the OSX grey background and all the related emails threaded below it. I don't want this. I go up to View -> "Hide Related Messages" and it goes away.... only to return when I restart Mail, restart my computer, log out/in, or even sometimes when I come back from screensaver or the dashboard. I can't for the life of me get this "Hide Related Messages" setting to stick.
Does anyone have any ideas?

Try Mail Preferences/Viewing/Include related messages (uncheck that box). I just upgraded to Mountain Lion and had roughly the same problem which I fixed this way. I prefer to have that as an icon on my toolbar, which you can add by going to the View menu, Customize toolbar, and drag the "show related messages" icon to the toolbar.

Query on thread safety

Hi everybody
i have a query relating to thread safety.When we say that Vector is thread safe or synchronized and Arraylist is not synchronized,what does that really mean.if possible can you provide me with a piece of code to clear the above query.
Also can you tell me in which situations i should use a Vector & Arraylist in my code.
regards
kvikram

i have a query relating to thread safety.When we say
that Vector is thread safe or synchronized and
Arraylist is not synchronized,what does that really
mean.You have two or more theads accessing data. At least one of those is modifying the data. That is the problem.
>
Also can you tell me in which situations i should use
a Vector & Arraylist in my code.You create your code in the context in which it exists.
If you are using threads then the data that is accessible to more than one thread must be thread safe it that is a problem. Vector and ArrayList are classes and not solutions to that problem.

Thread safety II

Is it safe to use clones of a document in multiple threads?
Gj
null

public static void serve(Document template, Document data,
Element userdata,
PrintWriter out) {
XMLDocument clone = (XMLDocument)data.cloneNode(true);
clone.getDocumentElement().appendChild(userdata.cloneNode(true));
serve(template, clone, out);
This is what I mean. I used this technique and it removed all the
strange bugs related to threads...except one, it would appear.
I get very intermittent NullPointerExceptions on the second line
when data and userdata will always have elements.
Gj
Oracle XML Team wrote:
: Grant Jennings (guest) wrote:
: : Is it safe to use clones of a document in multiple threads?
: : Gj
: What do you mean by "clones of a document"? If you mean copying
: the global area set up by the constructor to another thread
then
: it should work.
: Oracle XML Team
: http://technet.oracle.com
: Oracle Technology Network
null

Thread vs Non-Blocking - invoke thead

Hi,
My question related to Thread vs Non-Blocking IO used for network application. If my application needs to handle several thousands or even ten thousand connection simultaneously, did I little research, I concluded that instead of having 10,000 thread running (don't know even that number is possible), I should use NIO instead. My question is that, if I use NIO and fire up a thread everytime I had new data coming in to process, will over head of creating new thread reduce performance a lot than having all the thread running all the time? Should I handle incoming data sequentially and try to avoid blocking during the process?
TIA

If you would take the trouble of reading the previous 10 or 20 posts in this forum about threads and/or NIO you would have your answer, or at least most of it.

Experience with Thick Driver - Problems with threads?

Hi!
I was wondering if anybody has experienced some problems
in the past regarding the use of the JDBC thick client?
There are some "rumors" in our department that (at least
two years ago) the contents of threads got mixed up!
Have you heard of such errors?
We have to make a decision at the moment wether to use
thin or thick client. We use Oracle 8.1.7. and a
Websphere App Server 4.04.
Any comments about the reliability of thick drivers?
Thanks, any help is highly appreciated!
Cheers,
Steffen

Hello Steffen,
I have been using Oracle's JDBC Think Client for some time and havent faced any problems yet. Atleast, havent faced any problems related to Threads.
Hope this helps.

Help Needed - Java Threads

Hi there,
It's related to Threads in Java, I have the following code and it doesnt compile using NetBeans. While it compiles and runs fine in command prompt i.e. using javac testthreads.java.
class test implements Runnable{
public void run(){
System.out.println("this is from test class");
class testthreads{
public static void main(String args[]){
test t=new test();
Thread tt=new Thread(t);
tt.start();
I get the following error when trying to compile.
init:
deps-jar:
Compiling 1 source file to C:\myjavacode\ExtendThreadClassTest0\build\classes
C:\myjavacode\ExtendThreadClassTest0\src\MainClass.java:13: cannot find symbol
symbol : constructor Thread(test)
location: class java.lang.Thread
Thread tt=new Thread(t);
1 error
BUILD FAILED (total time: 0 seconds)
If I use extends Thread instead of implements Runnable the above source code compiles fine in NetBeans as well.
Any idea what's wrong..... Pls suggest!!
Thanks!

but this seems to be the issue with netbeans ide.... any idea if I need to change any setting etc. in IDE?

Understanding Java Thread Dump

Hi,
I was looking at the following thread dump
Full thread dump Java HotSpot(TM) Server VM (11.0-b16 mixed mode):
"pool-3-thread-1428" prio=10 tid=0x72b83800 nid=0x60ef waiting on condition [0x73318000..0x73318fb0]
java.lang.Thread.State: TIMED_WAITING (parking)
at sun.misc.Unsafe.park(Native Method)
- parking to wait for <0x98983260> (a java.util.concurrent.SynchronousQueue$TransferStack)
at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:198)
at java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:424)
at java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:323)
at java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:874)
at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:945)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
at java.lang.Thread.run(Thread.java:619)
"MergeTask" daemon prio=10 tid=0x09454c00 nid=0x60e7 waiting for monitor entry [0x65106000..0x65106f30]
java.lang.Thread.State: BLOCKED (on object monitor)
at org.apache.log4j.Category.callAppenders(Category.java:201)
- waiting to lock <0x96d90bb8> (a org.apache.log4j.spi.RootLogger)
at org.apache.log4j.Category.forcedLog(Category.java:388)
at org.apache.log4j.Category.log(Category.java:853)
at sun.reflect.GeneratedMethodAccessor55.invoke(Unknown Source)
I can see that 0x98983260 and 0x96d90bb8 are memory addresses of condition object and lock object respectively (I hope ti. But I was puzzled with [0x73318000..0x73318fb0] and [0x65106000..0x65106f30].
What do these memory ranges indicate? Is there any documentation related to thread dump?
In OpenJDK source code I can see following comment. But I did not understand what it means.
// print guess for valid stack memory region (assume 4K pages); helps lock debugging
st->print_cr("[" INTPTR_FORMAT "]", (intptr_t)last_Java_sp() & ~right_n_bits(12));
Thanks,
Unmesh

Thread Dump Analysis On AIX Platform:
http://middlewaremagic.com/weblogic/?p=4348

What is wrong with my 2730p? (Lag, Mouse Device Problems)

long story short, i have been having tremendous usability issues with my laptop, including mouse problems and tremendous lag (both with and without the hdd), and missing/broken system files which sfc/ scannow fails at fixing.
the system in question has an L9400 cpu, 4 gigs of ram, vista business and linux mint 11 installed in a dual boot configuration to a toshiba mk1633gsg mini sata hdd, and there are also many livecds and liveusbs that are used with this pc.
an hp technician on another forum has informed me that these issues may be indicative of a failing hdd, and it has been made apparent by many other users on some other forums that toshiba hdds have a pretty bad reputation ... however, after removing the hdd and running the system from a livecd, i have surprisingly encountered many new problems:
(the following occurs with the hdd removed)
a linux mint 6 live cd which works perfectly fine for all other tested systems gets stuck while loading the os. it either gets stuck while loading "acpi modules" or " /casper/vmlinuz" or, if it can get past those, the os loading progress bar gets stuck at approximately the same place each time, where it will stay motionless until the system quits on its own and spits out this error: "isolinux: disk error 01, ax = 4200, drive 9f"
the laptop can boot from a linux mint 11 livecd about 50-60 percent of the time. the other 40-50 percent of the time, it also gets stuck at loading "acpi modules" or " /casper/vmlinuz" BUT if it can get to the screen where there is a progress bar, it tends to load the os completely.
while running from a linuxmint 11 livecd with the hdd removed, in a very well conditioned room, suddenly:
with about 15-20 tabs open, after watching a few youtube videos, i lost ctrl-v paste.
then i lost right click functionality,
then i lost the ability to alt-tab into other open programs,
then i lost the ability to click on anything other than what is within the firefox window (i could click on all of the browser buttons, all of the tabs, all of the links but i could not shrink or minimize the window or switch to another program).
then there was lag when saving a txt file to a portable hdd.
this is utterly bizzare. with the ram passing 8 hours of memtest86 without errors and with the hdd removed and with only about 20 tabs open, what could be causing these problems?
furthermore, with the hdd attached:
in vista and linuxmint 11 (both installed to hdd), the mouse problems are currently:
the right mouse button becomes unresponsive after about 3-7 tabs are opened in firefox OR after a large video file is opened in vlc,
the left mouse button will randomly lose functionality after about 10 tabs are opened OR after a large video file is opened in vlc (the lmb will randomly work in some windows and not in others or it becomes completely unresponsive),
usb mice which used to work perfectly fine are no longer recognized and
the pen may not work at all upon boot.
furthermore, there have been 2 longstanding mouse problems that have been with this pc for as long as the current hdd has been in use;
the left mouse button becomes completely unresponsive in flash games (while still working outside of the game) when a moderate number of targets appear (5 enemies),
and the pen has the strange tendency to connect the leading points of successive dashes and lines shortly after those lines are drawn (eg: if i draw a lowercase t, with one line going downward and the other going from left to right, the resulting figure will look like a cross for about .25 seconds before it suddenly and inexplicably transforms into a 'number 4' shape with a very thin line connecting the leading edges of the 2 dashes), thus making it completely useless for drawing and handwriting recognition.
prior to the hdd scans, these mouse problems would occur without fail about 15 seconds (and no sooner, strangely) after the enter password screen appears on vista or immediately upon boot in linuxmint and there would also be incredible lag associated with every mouse click in both vista and linuxmint (including an extra lag of about 7-30 seconds every 3 seconds in vista).
this is the 2nd hdd to fail in this laptop in 2 years, albeit both hdds had a few years of use.
the following TESTS have been conducted:
ran the embedded hp hdd and memory diagnostics , passed with no errors , had no effect
the hdd passed seatools' long test , and the ram passed 8 hours of memtest86 with both sticks of ram connected. i have not (yet) attempted to run memtest with the reverse orientation or with each stick by itself.
here is the crystaldisk info report:
[url=http://imageshack.us/photo/my-images/35/l9ql.png/]l9ql.png[/URL]
the hdd instafailed both smartudm and the 'toshiba smart' test (from hirens boot cd 15.2 )due to not detecting an ide drive.
the toshiba error was: 'NG device defective' ...
the smartudm error was: 'error, ide drive not found'
here are the temps accoding to CPUID HWMonitor 1.23:
afternoon:
http://imageshack.us/photo/my-images/6/uhw.png/%5D%5BIMG%5Dhttp://img6.imageshack.us/img6/6809/uhw.p...
night:
http://imageshack.us/photo/my-images/850/3i8o.png/%5D%5BIMG%5Dhttp://img850.imageshack.us/img850/360...
clicking the health tab of the free version of hdtune (to check the SMART status) causes the program to become unresponsive.
ran windows memory diagnostic, passed with no errors , had no effect
ran vista disk check ... had no effect ... found bitmap errors, crosslinked files, orphaned files ... can produce logs if desired
ran sfc /scannow ... found numerous missing and broken dlls ... more info in this link:
http://www.pchelpforum.com/xf/threads/hardware-tests-for-malfunctioning-laptop-2730p.154894/#post-99...
the operating temps are not the highest they've ever been ... between 37-40 degrees celcius
ac adapter voltage (checked with multimeter) is perfectly stable and within parameters ...
pc wizard 2012 crashes immediately upon starting and restarts into debug mode ...
another disk check, following a hard shutoff, has resulted in more stabilized behavior; lag and mouse problems only occur if a certain (small) amount of system resources are used (3 tabs in firefox before problems start occuring).
is it possible that some other problem is causing the hdds to fail? i'm wondering if there may be a capacitor problem or something ...
there are some new problems:
i get this message: 'Non-System disk or disk error' (with the main hdd connected) despite the fact that no external drives are connected. usually, turning the pc off and on again resolves this, but i wonder if this is indicative of a bigger issue.
also, it is really difficult to boot from usb for some reason; despite attempting many methods, hirens boot cd had to be burned to a cd before i could use it.
related earlier threads:
http://h30434.www3.hp.com/t5/Notebook-Hardware-e-g-Windows-8/Hardware-Tests-for-Malfunctioning-2730p...
http://www.pchelpforum.com/xf/threads/hardware-tests-for-malfunctioning-laptop-2730p.154894/
PS: pending your responses here i may attempt to update the bios.

Run Mountain Lion's recovery, repair permissions and restart your computer.
You need to detail "weird."
OS X: About OS X Recovery

After iOS 8 upgrade keyboard shortcuts gone, just reboot

FYI,
apparently this also happened with the ios7 upgrade. Per the related ios7 thread, after a manual reboot of the phone, the shortcuts reappeared. The reboot solved my problem as my keyboard shortcut settings reappeared after reboot.

I lost all my keyboard shortcuts on my iPhone 5s after upgrading to iOS 8. They still showed up on my iPad Air (iOS 8) and iMac (10.9.5). There were, however, massive sync problems, sometimes they would only flow from one device to all the others, sometimes from one device to only one of the other two, sometimes not at all.
I deleted all my shortcuts and started from scratch, deleting “~/Library/Application Support/Ubiquity”, ~/Library/Dictionaries” and “~/Library/Mobile Documents/com~apple~TextInput” from the iMac and KeyboardDomain from my iOS devices.
Rebooted everything a dozen times.
Toggled Documents & Data Sync off and on a dozen times too in all kinds of combination with rebooting and deleting the aforementioned files.
Everything always starts working and syncing fine for a very short while, but sooner or later one of my devices stops receiving new shortcuts as I re-add them.
I reboot that device and it catches up. I enter new shortcuts, and that device doesn’t get any new shortcuts. This time, a reboot doesn’t fix anything.
After using my devices for a while, I notice shortcuts are entirely gone from both the iPhone and iPad, but not from the iMac.
I even upgraded my iPhone 5s to a 6, and right off the bat it had issues with keyboard shortcut sync. I also setup my iPad as new, and same thing: right off the bat, sync issues with keyboard shortcuts.

Related to Thread.

Similar Messages

Maybe you are looking for