DayLight Time - Java

Hello there!
Well...
Im having a problem with Date, Calendar, JodaTime, API...
I live in brazil and i need to take the date and hour from the system...
But when im into summer time for java the time comes wrong... one hour more or left....
It happens only when my SO is checked to "Ajust automatcly the clock to summer time"...
Someone know how can i do to get the date and hour from system?
Normally... just the time marked in menubar...

Hi,
Did you get an answer for your question?
After the time switched to summer time(daylight savings), we are seeing that the time in our JAVA (JDK 1.4.2) is out of sync with our SAP (ABAP) servers.
Can you help us get the time corrected. If you can give a step-by-step instruction to correct the time at JAVA - JDK 1.4.2 that will be great!
Thanks,
Arul
[email protected]

Similar Messages

  • Daylight Time Saving......

    I recently got this java project which needs someone to do this daylight time saving stuff..... the problem is i don't quite understand how the timing works... so can anyone whose familiar with Australia's daylight saving explain to me?... or maybe some codes to let me have a look....
    Thanks in advance....

    Daylight saving time. You don't have that where you live? Anyway, the idea is that sometime in the spring, the clock is set forward by one hour. The result is that the sun appears to set one hour later in the evening and rise one hour earlier in the morning, thus saving electricity usage. Then sometime in the fall, the clock is set backward by one hour. There is nothing unusual about DST in Australia, I don't think, except that their spring is around September and October, which might confuse somebody from the Northern Hemisphere.

  • Updating Time from NIST to Pacific Daylight Time

    I'm a newbie to Java and I'm trying to finish my final project in my Java class.
    Our project consists of setting up an ODBC and downloading data from a website and saving it to a text file that includes the current time from NIST.
    The specs ask for:
    Obtain the current exact time from the NIST (National Institute of Standards and Technology) by decoding the time from this web page or this web page and subtract 7 hours from it.
    b.     Open a sequential file and call it "APRYYMMDD.txt" where YY is year, MM is month, DD is the current day.
    c.     Write the first record as the exact time UTC obtained above.
    d.     Write the second record as the exact time obtained above minus 7 hours and formatted as "MM/dd/yyy kk:mm " (see SimpleDateFormat class).
    Which I have done, but my problem is coming forth when I write the code to update the time. When I subtract 7:00 hours from the GMT, the time is off by two hours, when I subtract 14:00 it is correct.
    If anyone can help me, there are Duke dollars available.
    Here is my code:
    � public static void Phase3(String mstrODBC, String mstrTable)
    ��� {
    ������� RandomAccessFile raf = null;
    ������� java.util.Date CurDate = null;
    ������� String Curtime = inetBank.getURL("http://128.138.140.44:13/");
    ������� SimpleDateFormat df = new SimpleDateFormat("yy-MM-dd hh:mm:ss");
    ������� String AvgApr = null;

    ������� SimpleDateFormat pf = new SimpleDateFormat("MM/dd/yyyy kk:mm");

    ������� try{

    �������� CurDate =� df.parse(Curtime.substring(8,25));

    �������� // Creates a text file if no such file is there
    �������� // If file exists deletes all its data and then rewrites in it
    �������� raf = new RandomAccessFile("APR" + justNumbers(Curtime.substring(8,16),"-","") + ".txt","rw");
    �������� raf.setLength(0);
    �������� raf.seek(0);
    �������� raf.writeBytes(Curtime);

    ������� pf.setTimeZone(TimeZone.getTimeZone("GMT-14:00")); // new code

    �������� raf.writeBytes("Pacific Daylight Time = " + pf.format(CurDate) +"\r"); //new code

    One more try:
        public static void Phase3(String mstrODBC, String mstrTable)
            RandomAccessFile raf = null;
            java.util.Date CurDate = null;
            String Curtime = inetBank.getURL("http://128.138.140.44:13/");
            SimpleDateFormat df = new SimpleDateFormat("yy-MM-dd hh:mm:ss");
            String AvgApr = null;
            SimpleDateFormat pf = new SimpleDateFormat("MM/dd/yyyy kk:mm");
            try{
             CurDate =  df.parse(Curtime.substring(8,25));
             // Creates a text file if no such file is there
             // If file exists deletes all its data and then rewrites in it
             raf = new RandomAccessFile("APR" + justNumbers(Curtime.substring(8,16),"-","") + ".txt","rw");
             raf.setLength(0);
             raf.seek(0);
             raf.writeBytes(Curtime);
             //GMT-12:00 gives a time which is less than 12 hours of GMT time.
             // NIST time is 5 hours more than GMT. So, (5+7) total 12 subtracted to
             // get the desired time.
             pf.setTimeZone(TimeZone.getTimeZone("GMT-5:00"));
             raf.writeBytes("Pacific Daylight Time = " + pf.format(CurDate) +"\r");

  • Scheduling in Real-Time Java

    Hello,
    I have some questions concerning how scheduling in fact is intended to be performed in a RTSJ based Real-Time Java System.
    As far as I understood, RTSJ requires pre-emptive priority-based dispatching of Schedulable objects.
    This means that the execution eligibility of a schedulable entity is mainly its priority.
    That causality is reflected within the specification with the (one-and-only specified) PriorityScheduler, which is the base scheduler for actual Real-Time Java applications.
    Furthermore, there is a notion of extensibility of that PriorityScheduler described by RTSJ,
    in order to provide further scheduling mechanims and feasibility analysis algorithms (please correct me if there are any wrong assumptions).
    This is the point, where everything becomes really weird to me ...
    As far as I could investigate, in most RTSJ implementations based on a POSIX compliant system underneath (like Java RTS does on RTLinux or Solaris)
    each (Realtime)JavaThread is mapped 1-to-1 to a light-weight process on the operating system level (e.g. a pthread).
    So far, we have no "green threads" within the JVM, but real LWPs scheduled by the OS.
    The difference between "normal" and "real-time" threads lies in the scheduling policy used for that mapping.
    While normal Java threads probably map to SCHED_RR or SCHED_OTHER, real-time threads are scheduled by the OS via the SCHED_FIFO policy in order to achieve a better real-time predictability.
    However, the OS's scheduling mechanisms automatically make decisions about the right positioning of a LWP within an appropriate run-queue, due to thread's preemption, blocking or release (even dynamic priority changes) activities and its scheduling policy.
    That's exactly why I ask myself, what is the need of a Scheduler representation within a JVM?
    Furthermore, how a Scheduler extension is able to incorporate with the threading model and the underlying scheduling mechanisms of the OS?
    One point could be a situation where a real-time JVM runs directly on top of the bare hardware and has to perform scheduling decisions on its own.
    The Scheduler API could then be understood as an extension mechanism of a kind of JVM-intern scheduler (e.g. the PriorityScheduler), thereby allowing scheduling decisions to be made even in user defined Scheduler implementations.
    A similar use case for an OS-based scenario could be if a JVM is intended to pass scheduling/threading routines of the underlying OS (eg. a part of the POSIX API)
    up to the Java application level in order to provide the opportunity for a kind of application defined scheduling (like e.g. in the MaRTE OS).
    Unfortunatelly, after introspecting the RTSJ API, both conclusions seem to me to be wrong.
    So far, Java RTS seems not to provide any mechanism for reaction on scheduling events/decisions, neither intra-JVM nor from an underlying OS outside of the JVM.
    Furthermore, there is no notion for incorporation with the base PriorityScheduler for making extended scheduling decisions.
    I hope this post could bring me more light into the scheduling idea behind Real-Time Java systems as intnded by the RTSJ.
    Sincerely,
    Vladimir

    Vladimir.Nikolov wrote:
    That means, that a scheduling policy different to PriorityScheduler can only be assigned to a Schedulable object if it is supported by the OS and the JVM?Well it has to be supported by that implementation of the RTSJ. Howe that is done - ie whether it requires OS support - depends on that VM, the OS and the actual scheduling policy.
    It also seems that at the current state of the art the PriorityScheduler representative within the JVM is intended only for manipulating a feasibility set of Schedulable objects (supporting online feasibility analysis)?
    However, since user-defined scheduling is not intended by the specification, applications have to rely on the feasibility analysis based on the underlying/supported scheduling mechanisms.
    Thus, in the current Java RTS implementation this would be the "default" feasibility mechanism based on the PriorityScheduler.
    Unfortunatelly I can not figure out the need of maintaining a feasibility set, since feasibility, as specified for the PriorityScheduler, is a simple asumption that we have "an adequatly fast machine to handle the periodic and sporadic load"?
    I actually assumed that feasibility analysis performs real cost budgeting taking into account deadlines and so on, but it seems to be specified simply to make a negative statement always when aperiodic tasks are involved ?The RTSJ scheduling framework provides support for feasibility analysis by defining the admission control methods eg setXXXIfFeasible. However the RTSJ does not, and can not, mandate any non-trivial feasibility algorithm because in simple terms no such general algorithms exist. There are some static feasibility tests in the literature and you could apply those offline to your application (assuming you can find the values of all the "magic" numbers in such formulae - which is generally not the case). At present the RTSJ doesn't support even these simple feasibility tests because blocking-time is not recorded in the release parameters - something being addressed in RTSJ 1.1. In any case unless there is a pluggable framework for feasibility tests it would be a waste of time for VMs to implement them given they can (more) easily be done offline using other tools.
    Only dynamic admission control is really of interest and as far as I am aware no such general dynamic admission control policies exist (anything you find in the literature is very context specific). So it is left up to an implementation as to whether they try and define dynamic admission control algorithms - and so far none have because they don't have one.
    In "Getting More Flexible Scheduling in the RTSJ" Wellings and Zerzelidis propose some (more or less) "minor" extensions to the RTSJ API in order to enable hierarchical scheduling within the fixed priority framework.
    Since Andy Wellings is a member of the RTSJ Technical Interpretation Committee, is there any attempt to evolve the specification in a similar direction as described above, in order to support more flexible scheduling mechanisms and feasibility analysis?If there is ever a RTSJ 2.0 then more sophisticated scheduling support is one of the items on the wishlist. But there's no guarantee there ever will be a RTSJ 2.0
    David Holmes

  • Regarding real time java packages

    Hi,
    I am relatively new to java. can anybody tell me about real time java, and where can i find the implementation of javax.realtime package?

    i have found a real time java specification which has a package javax.realtime which lists some classes like timer,asyncevent etc. that would be helpful for me. i am supposed to use j9 jvm on qnx rtos. but these classes dont come with standard jdk. can u tell me how to proceed?

  • AspectJ with real time java

    Hi
    Does real time java supports aspectJ with Load-time weaving ( LTW ) ? ( compile time weaving )

    Not sure what you mean by "support". AspectJ rewrites bytecodes so the VM will just execute them. You'll probably encounter increased memory usage with load-time weaving as class loading/initialization occurs in Immortal memory. Also load-time weaving won't be compatible with Java RTS's Initialization Time Compilation (ITC) feature ... or at least not the pre-initialization part. It's likely that no-heap threads won't work well running weaved code if there are any references back to heap-allocated AspectJ runtime objects, and similarly (like most libraries) it's not likely to work from scoped memory.
    HTH.
    David Holmes

  • HT5648 After uninstalling and installing several times, Java plug-in is still undetected. Support suggested I open up the control panel and click update but there isn't such an option. The advance tab, there aren't any options to enable or disable plug-in

    After uninstalling and installing several times, Java plug-in is still undetected. Support suggested I open up the control panel and click update but there isn't such an option. The advance tab, there aren't any options to enable or disable plug-ins.

    If you're running Java 7, then in System Preferences > Java > Java Control Panel in the Security tab there is a check box to enable Java in your browser. To check for update go to the Update tab.

  • Daylight time savings

    Hi All,
    is there any possibility to find day light
    savings time change, when the system is set for day
    light savings in forte?
    The isDST attribute in datetimedata, its always
    true, if the system is set for day light savings.
    Thanks,
    babu
    http://mail.yahoo.com/

    If setcurrent is used on datatimedata attribute then isDST is automatically
    set to value of the forte environment variable that your computer has. So
    if it's always coming true, you need to check your forte env variables or
    set the isDST explicitly in tool code.
    -----Original Message-----
    From: Babu Raj [mailto:ibcsmartboyyahoo.com]
    Sent: Tuesday, September 12, 2000 3:42 PM
    To: forte-userslists.xpedior.com
    Subject: (forte-users) daylight time savings
    Hi All,
    is there any possibility to find day light
    savings time change, when the system is set for day
    light savings in forte?
    The isDST attribute in datetimedata, its always
    true, if the system is set for day light savings.
    Thanks,
    babu
    http://mail.yahoo.com/
    For the archives, go to: http://lists.xpedior.com/forte-users and use
    the login: forte and the password: archive. To unsubscribe, send in a new
    email the word: 'Unsubscribe' to: forte-users-requestlists.xpedior.com

  • Daylight Time Saving - SQL Server 2008 Mirroring

    Dear SQL Forum Group Members,
    1) Could anyone clarify me, will there be any issues in SQL server 2008 Mirroring because of Daylight Time saving ?? Also, will there be any impact on Tlog backup scheduled jobs which will be running in 15 Minutes interval.?
    2) Do i need to reschedule my mirroring & scheduled jobs on Daylight saving days?? Is there manual(DBA) Intervention needed on these days??
    Awaiting your valuable feedback.

    Nope, there won't be any impact on the database mirroring as it continually transfer the log.
    http://www.sqlskills.com/blogs/paul/how-does-daylight-savings-time-affect-disaster-recovery/
    -Prashanth

  • Daylight time saving patch

    Hi
    All,
    oracle 10.2.0.3
    AIX 5.3
    How can I check whether Daylight time saving patch has been applied or not?
    Does 10.2.0.3 includes daylight time saving patch?
    Thanks,
    Vishal

    Does 10.2.0.3 includes daylight time saving patch?Yes. They are included.
    Check metalink note : 418217.1 - Is DST Patch Included In 10.2.0.3 Patchset?
    [http://kr.forums.oracle.com/forums/thread.jspa?threadID=656769]
    HTH
    -Anantha

  • Adjust for daylight time saving different for just one user

    I justed started a new job and I am introduced in a new Windows Terminal Server environment. We use Windows 2003 Server, Exchange 2003, a Sun Fire V210 server and SunRay 270 TC's. The SUN part is totally new for me, so forgive me ;-)
    We have one user that has an Outlook (2003) problem. She saw that after the 28th of March, when the summertime here in the Netherlands is active, her appointments are shifted for an hour. I checked as a Windows administrator the Windows TS she is working on and it has the correct TZ(GMT+1, Amsterdam) and the option for Adjust Daylight Time Saving is enabled.
    Then I checked with her in Outlook, whether this setting is reflected correctly. In Outlook I went to Tools, options, Calendar Options, Time Zone and the checkbox 'Adjust for Daylight Time Saving' is disabled! That is strange since this should be the setting of the server and as I already wrote, this is correct. Ofcourse therefor she can't enabled it here. I let her login with her id card on a different TC 270 client and the same problem there. Than I started on my laptop a remote desktop connection to the Windows TS and we checked again. The strange thing is, now the option is enabled and all her appointments are correct after the 28th of March.
    We have checked with all the other users and nobody else has this problem. We have deleted her Windows profile totally but this didn't solve it.
    Since it only happens when using TC's, I reckon the problem is with the Sun TC's or the SunRay Server.
    Does anybody has a clue what this could be? The Sun Fire doesn't save user specific information, does it?
    Thanks in advance
    Kind regards,
    Olaf

    Ok, now I am a bit confused. I saw the page http://wikis.sun.com/display/SRWC2dot2/Home and looking at that, it seems the SRWC software is Windows software, We have not installed any Windows software from SUN. So, also no SRWC software on Windows. I thought the SRWC was a software component on the SunRay server?
    Maybe I did not explain the problem correctly, but the we have several thin clients, SunRay 270's. They are connected to the Sunray Server, Sun Fire v210. This server redirects them to our Windows Terminal Server. We use Exchange Server 2003 on our Windows 2003 Servers.
    We have one user with the problem. She puts in her ID card in the TC, she is redirected to our WTS, she logs in in the Window login prompt. She starts Outlook and sees in there with Tools, Options, Calendar Options, Time Zone, that the Adjust Daylight Time Saving is disabled. Although this is on the WTS server enabled, system wide.
    When she doesn't use a TC but starts a remote desktop connection from a Windows machine to the WTS, it works fine.
    Again I apologise for my lack of knowledge on the SUN side of this.
    Olaf

  • Real Time Java

    Hi. I am required to design a Real Time project using Real Time Java. The problem is that I have no idea what I can do in the time allocated (two weeks).
    Anybody have any idea what could be interesting to do, or have pointers where to look?
    Thanks
    Eric
    P.S Sorry if there's a Real Time Forum.

    Ouch.
    In a real time system, you absolutely positively must have certain events happen at specific moments in time, regardless of what else the CPU might be doing.
    To use a poorly timed example, a rocket booster on the space shuttle must ignite its engine exactly five minutes, three seconds after take off - even if the computer is busy processing the latest SETI data. In other words, time based pre-emptive multitasking.
    The closest you can come to it is using threads to start and suspend tasks according to the system clock. So for something codeable in two weeks...
    Look on the web for two suitable compute-intensive mathematical algorthims. RSA key generation would be one.
    Put each algorithm into its own thread. Add a third thread that explictly saves the current system time to a file every five minutes. So I would see something like...
    Thursday April 03 2003 13:22:05
    Thursday April 03 2003 13:27:23
    Thursday April 03 2003 13:32:18
    As the output. Notice the variation in seconds. If you did it right and it works in real time, there should be no variation - it saves at 05 seconds on the dot each and every time.
    If you want more suggestions or advice, I suggest asking over on the "advanced language topics" or "algorithms" boards. Do NOT cross-post!

  • ICal Invites show Standard Time instead of Daylight Time

    When sending event invites from iCal 4 with Exchange 2007 the event is created correctly but the email message is off by an hour and says Eastern Standard Time instead of Eastern Daylight Time.

    I have the same problem.
    I just imported my Palm Date Book calendar into iCal. The appointments in October show the correct time. Those in November are off by one hour. Here in Toronto, we go off Daylight time at the end of October.
    My question is, if I correct the appointments now, is iCal going to "correct" them again when the time change actually happens?
    I see there are lots of unanswered questions on Time Zone problems with iCal. Seems to be an issue with deep roots in the program.
    GB

  • Disable Daylight time zone

    Hi ,
    Is there a way to disable Daylight saving time zone for Java.
    Platform - windows NT
    Time zone - GMT +0200
    Daylight saving time adjustment - disabled
    Time - 2nd july 2002 04:46:00 PM
    System.out.println(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date()));
    returns 2002-07-02 17:46:00
    expected date is 2002-07-02 16:46:00
    now i my system has following settings
    Daylight saving time adjustment - disabled
    Time - 2nd july 2002 05:47:00 PM
    System.out.println(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date()));
    returns 2002-07-02 17:47:00
    expected date is 2002-07-02 17:47:00
    It looks like Java is automatically adjusting the
    Daylight saving time
    How can i disable it?
    thanks in advance
    regards,
    Johinth

    Java has the TimeZone class which can allow you set a certain TimeZone for your Calendar object. There are certain TimeZones that do automatically adjust for DST, and a few that don't. There are methods on TimeZone to tell you if the TimeZone automatically adjusts for DST, and if the TimeZone is currently adjusting for DST. However, there is no way to disable it if that timezone does in actuality adjust for DST.
    The question being, if you're in EST which does adjust for DST, why would you want the time without the adjustment? If you're living in a timezone that does not adjust for DST, simply create your TimeZone class with the correct constant for that time zone, and it will no longer make the adjustment.

  • Wait ms sec with out daylight time problem and suppress jitter

    How tu use a good wai ms?? One solution is to use the Wait (ms) but it's result in a time jitter. We can use wait until next ms but the same problem will occured. Tick count give a realy bad result after aproximately 49 Days. The other solution sugested by NI give bad result with Daylight or any change in sustem time of the computer.
    So I bring this little solution feel free to use it in your code it's a quite good VI. The jitter is about 60us. Not that bad.
    Have a happy programming time...
    B.
    Benoit Séguin
    Software Designer
    Attachments:
    Timing functional Global.vi ‏21 KB

    Hi Benoit,
    Is the purpose of your post to share your code?  If so, then you may want to post it in the Developer's Network.
    RayR

Maybe you are looking for