java-programmer >>Daylight Savings Time in Calendar

Daylight Savings Time in Calendar

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- 1
  - Swing Alignment ProblemsI have had this problem a number of times, and I've always had to hack
    around to fix it, and I'm not sure what is actually going on. Due to work
    agreements, I don't have code I can show at the moment, but I've seen this
    so often I'm hoping it's not unique to me.
    
    I have a JPanel, and within that, a JLabel, and within that, of course,
    text.
    
    I've set the layout for the panel like this:
    
    JPanel myPanel = new JPanel();
    myLayout = new BoxLayout(myPanel, BoxLayout.Y_AXIS);
    myPanel.setLayout(myLayout);
    
    Then I have 3 or 4 or more JLabels, each set up like this:
    
    JLabel myLabel = new JLabel("Here is my text.");
    myLabel.setAlignmentX(JLabel.LEADING); //Sometimes try LEFT instead
    myLabel.setHorizontalAlignment(JLabel.LEADING); //Sometimes LEFT
    
    And I still end up with all my labels aligned to the RIGHT. (Remember, I've
    tried LEFT instead of LEADING in all cases!)
    
    I've had this happen many times. I even set the alignment on myPanel to
    LEFT. I simply cannot figure it. I've set the alignment on the panel, and
    on every element in the panel and on the text in every element (using both
    setHorizongalAlignment and setHorizontalTextPosition(JLabel.LEADING)) and
    it STILL aligns things to the right.
    
    I've had this happen on a number of Swing panels and windows. I've heard
    people comment, at times, that Swing can do screwy things like that, but
    I'm not sure if they were serious or just frustrated at the time.
    
    So does this happen for a reason? Is there something else I should align
    that I haven't mentioned?
    
    Thanks!
    
    Hal
- 2
  - java x509 certificate issuer hashIs there any all-java equivalent to the following openssl x509 hash of
    the certificate issuer name?
    
    $ openssl x509 -hash -noout < somecert.1
    
    I'm trying to compute the 8-digit xxxxxxxx to name the file as
    xxxxxxxx.0 in a certificates directory. Thanks,
    --
    Benjamin Rutt
- 6
  - Why jsp can't get the Vector fill with user-defined class by the Remote interface?Because It is a big project so i provide a model to express my
    question,
    Qestion is:I want get the Vector full fill with the a Object in Jsp.
    but I can't get it,There will problem will return test return,but we I
    Choose String but no class a 's object ,It can be return successful.It
    seems that jsp Can't recognize the class a,,but I really include the
    Ejb module in jsp's lib.and editor alse prompt a's information.
    I alse test it in JBoss server It alse occur Exception!
    I cant understand why,
    so come to here ask why?Please help me,3ks very much!!!
    
    ----------------------------------------------------------------------------------------------------
    I use Netbean 6.1,Glassfish.Ejb3
    import javax.ejb.Stateless;
    
    1.
    @Stateless(mappedName="T")
    public class vectorBean implements vectorRemote {
    //Vector v;
    //@PostConstruct
    //public void Init(){v=new Vector}
    
    public Vector test(){
    Vector v=new Vector();
    v.add(new a("alex",14));
    return v; }
    }
    
    2. a is a simple class
    public class a {
    public String m;
    public int n;
    
    public a(String m, int n) {
    this.m = m;
    this.n = n;
    }
    getter,and setters!
    }
    
    3.Jsp
    InitialContext ctx=new InitialContext();
    //ShoppingCartRemote
    s=(ShoppingCartRemote)ctx.lookup("shopcart");
    vectorRemote s=(vectorRemote)ctx.lookup("T");
    Vector v=s.test();
    Enumeration e=v.elements();
    while(e.hasMoreElements()){
    a p=(a)e.nextElement();
    out.println(p.m);
    }
- 7
  - Ant complaintHaving spent the past several hours trying to solve what ought to have
    not even been a problem to begin with, I've noticed something about
    Ant.
    
    It appears that Ant as it is delivered comes with a bunch of optional
    tasks that it knows about inherently, such as the Scp task.
    
    It also appears that while Ant ships knowing what these tasks are, it
    does not ship with jars they depend upon, such as jsch. The
    documentation tells you to go out and get these jars on your own, and
    put them in your Ant lib folder.
    
    Here's the part I don't like. When Ant starts, it appears to try to
    load optional tasks like Scp. When such tasks fail to load the first
    time, due to the dependencies not being there, it is then impossible
    to recreate a task with the same classname later using a taskdef
    element, even if you include your own path containing all the jars it
    needs.
    
    Let me explain why this is a big issue. I work in a team. X number of
    developers on my team share the same build script, on far-flung
    machines.
    
    I want to add Scp to the build script. I cannot simply manually put
    the jsch jar in my own Ant lib folder. It won't work when anyone else
    on my team tries it.
    
    Instead, I need to check the jsch jar into my project along with the
    ant script. Then, every developer on my team who gets the new script
    will also get the jar to go with it. So far this seems fine.
    
    The problem is that when the developer runs Ant, I still cannot
    instantiate the Scp task because the jsch jar is not in the classpath
    when ant starts. And, for some bizzare reason, I cannot even define a
    new scp taks using a taskdef element with a classpath (the way you'd
    do it if you were deploying your own task). Why this fails I don't
    know. My guess is that Ant somehow keeps track by class name that the
    task failed to load when Ant started, and refuses to try to load it
    again.
    
    I tried many ways to solve this problem, including copying the jsch
    jar into Ant's lib folder. Nothing works because before I can do
    anything Ant has already decided that Scp is an unloadable task.
    
    This is terrible behavior. Ant should either not come with "optional"
    tasks predefined that won't load, or it should at least offer the
    chance to reload them with a specific classpath later.
    
    Can anyone think of any way around this problem?
- 7
  - [Struts] Composite actions using include?Hi,
    
    I have a Struts 1.1 based webapp. A new requirement has come
    up, which I can satisfy by executing the existing actions A, B, C
    and forwarding to a new page xyz.jsp. The idea would be to
    write an action X and from there include (not forward) the
    existing actions, do some additional magic, and finally return
    an ActionForward poiting to xyz.jsp.
    
    How can I define an ActionMapping that allows me to do that?
    Or must I hardcode includes to A, B, C in X using
    RequestDispatcher.include()?
    Is this even feasible?
    
    What are the alternatives? Perhaps I could define A', B', C' in my
    struts-config, such that A' forwards to B' forwards to C' forwards to xyz.
    (But this would require changing existing code, too, because there would
    be no place for X's extra magic).
    
    Any thoughts?
    -- Sebastian
- 9
  - Date and Time conversionI have an Integer variable which contains date in YYYYMMDD format. I want to
    convert it first to a Date variable and then to a String variable with
    format MM/DD/YYYY. How can I do that?
    
    I also have an Integer which contain time in HHMMSS format. I want to
    convert it to a String variable with format HH:MM:SS. How can I do that?
    
    TIA
- 9
  - Class.forname() vs clone()email***@***.com (Mitch Ratisher) wrote in message news:<email***@***.com>...
    > email***@***.com (iksrazal) wrote in message news:<email***@***.com>...
    > > email***@***.com (Mitch Ratisher) wrote in message news:<email***@***.com>...
    > > > I'm not quite sure what you are trying to do, but the way I've done
    > > > factories is to load a Map with Class objects when the factory is
    > > > created. Then all you have to do is pass the Map whatever you mapped
    > > > the class to, and call newInstance() on the Class object.
    > > >
    > >
    > > Could you post some code? I've seen maps of objects using clone, and
    > > passing a class name string to forname/newInstance, but never maps
    > > directly with newInstance.
    > >
    > > I have a Abstract class, and I want to use a static method to retrieve
    > > the requested factory. The class is not a singleton, although I
    > > suppose it could be.
    > >
    > > Thanks for the reply,
    > > iksrazal
    >
    >
    >
    > private static Map map = new HashMap();
    >
    > // static initializer
    > static {
    > map.put("class1" MyClass1.class);
    > map.put("class2" MyClass2.class);
    > }
    >
    > public static Object newObject(String type)
    > {
    > Class clazz = (Class)map.get(type);
    > return clazz.newInstance();
    > }
    >
    >
    > You'll still have to catch a bunch of exceptions that can be thrown by
    > newInstance(), but that's all there is to it. If you can't hardcode
    > the class names, use Class.forName(name) as the 2nd argument in the
    > put() calls, where name is a String that was read from a properties
    > file.
    
    Thanks a lot Mitch!
    iksrazal
- 10
  - GWT: Deploying the server code in TomcatCan anybody point me to some simple instructions for deploying the server
    code in Google Web Toolkit to a Tomcat server?
    
    --
    Paul Tomblin <email***@***.com> http://blog.xcski.com/
    ---------------- hit any user to continue ----------------
- 13
  - selling EJBHi,
    
    Where can be EJB components sold on the internet. We are a software company:
    ZetaFoxeDesign Software Developement and we are thinking about starting new
    activity. We just don't konw if it's a good idea to off the shelf EJB
    component vendor.
    
    Sebastian
- 13
  - HP/UX Java 1.3.1.02 date/time differencesHi!
    
    We seem to have differences between the unix system time (coming from
    an NTP server) and the time our java application has (as it produces
    timestamps).
    At the start of the app the time is synchro and after about 2 weeks
    the time is 20secs ahead of the system time...
    
    Does the Java VM calculates the current time by its own (i.e. counting
    secs from start)? Or should it better get the time (if
    System.currentTimeMillis() is called) from the host system?
    
    Regards,
    Steffen
- 13
  - SIGSEGV in java 1.4.2-p6
    --Boundary-00=_CsGdAwPnbap1q+D
    Content-Type: text/plain;
    charset="us-ascii"
    Content-Transfer-Encoding: 7bit
    Content-Disposition: inline
    
    Hello,
    Running a freenet node I manage to get a segfault from javavm. It appears
    to happen at random intervals. Attached is the java error log and system CV.
    Please let me know if I can provide more information.
    
    --
    Wade Klaver
    Wavefire Technologies Corporation
    GPG Public Key at http://archeron.wavefire.com
    
    /"\ ASCII Ribbon Campaign .
    \ / - NO HTML/RTF in e-mail .
    X - NO Word docs in e-mail .
    / \ -----------------------------------------------------------------
    
    --Boundary-00=_CsGdAwPnbap1q+D
    Content-Type: text/plain;
    charset="us-ascii";
    name="typescript"
    Content-Transfer-Encoding: 7bit
    Content-Disposition: attachment;
    filename="typescript"
    
    Script started on Wed Apr 7 13:41:44 2004
    bash-2.05b$ uname -a
    FreeBSD ***.***.com 5.2-CURRENT FreeBSD 5.2-CURRENT #26: Thu Mar 11 08:25:16 PST 2004 root@***.***.com:/usr/obj/usr/src/sys/WORKSTATION-5.0-SMP i386
    
    bash-2.05b$ javavm -version
    java version "1.4.2-p6"
    Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2-p6-root_12_mar_2004_07_21)
    Java HotSpot(TM) Client VM (build 1.4.2-p6-root_12_mar_2004_07_21, mixed mode)
    
    bash-2.05b$ cat hs_err_pid50222.log
    
    An unexpected exception has been detected in native code outside the VM.
    Unexpected Signal : 11 occurred at PC=0x2814A927
    Function=flockfile+0x1F
    Library=/lib/libc.so.5
    
    Current Java thread:
    at java.net.Inet4AddressImpl.lookupAllHostAddr(Native Method)
    at java.net.InetAddress$1.lookupAllHostAddr(InetAddress.java:770)
    at java.net.InetAddress.getAddressFromNameService(InetAddress.java:1059)
    at java.net.InetAddress.getAllByName0(InetAddress.java:1009)
    at java.net.InetAddress.getAllByName0(InetAddress.java:981)
    at java.net.InetAddress.getAllByName(InetAddress.java:975)
    at java.net.InetAddress.getByName(InetAddress.java:889)
    at freenet.transport.tcpAddress.doDeferredLookup(tcpAddress.java:119)
    at freenet.transport.tcpAddress.connect(tcpAddress.java:130)
    at freenet.OpenConnectionManager$ConnectionJob.run(OpenConnectionManager.java:969)
    at freenet.OpenConnectionManager.createConnection(OpenConnectionManager.java:451)
    - locked <0x2c5eb158> (a freenet.OpenConnectionManager$ConnectionJob)
    at freenet.node.ConnectionOpener.checkpoint(ConnectionOpener.java:95)
    at freenet.node.states.maintenance.Checkpoint.checkpoint(Checkpoint.java:54)
    at freenet.node.states.maintenance.Checkpoint.received(Checkpoint.java:47)
    at freenet.node.StateChain.received(StateChain.java:177)
    at freenet.node.StateChain.received(StateChain.java:61)
    - locked <0x2c5eafc0> (a freenet.node.StateChain)
    at freenet.node.StateChainManagingMessageHandler$ChainContainer.run(StateChainManagingMessageHandler.java:332)
    - locked <0x2c5eafc0> (a freenet.node.StateChain)
    at freenet.node.StateChainManagingMessageHandler$ChainContainer.received(StateChainManagingMessageHandler.java:285)
    at freenet.node.StateChainManagingMessageHandler$ChainContainer.access$100(StateChainManagingMessageHandler.java:204)
    at freenet.node.StateChainManagingMessageHandler.handle(StateChainManagingMessageHandler.java:96)
    at freenet.Ticker$Event.run(Ticker.java:323)
    at freenet.thread.YThreadFactory$YThread.run(YThreadFactory.java:250)
    
    Dynamic libraries:
    0x8048000 /usr/local/jdk1.4.2/bin/java
    0x28080000 /usr/lib/libpthread.so.1
    0x280a3000 /lib/libc.so.5
    0x2816f000 /usr/local/jdk1.4.2/jre/lib/i386/client/libjvm.so
    0x28589000 /usr/lib/libstdc++.so.4
    0x2863b000 /lib/libm.so.2
    0x28653000 /usr/local/jdk1.4.2/jre/lib/i386/native_threads/libhpi.so
    0x28661000 /usr/local/jdk1.4.2/jre/lib/i386/libverify.so
    0x28676000 /usr/local/jdk1.4.2/jre/lib/i386/libjava.so
    0x28695000 /usr/local/jdk1.4.2/jre/lib/i386/libzip.so
    0x40a66000 /usr/local/jdk1.4.2/jre/lib/i386/libnet.so
    0x40a99000 /usr/local/jdk1.4.2/jre/lib/i386/libnio.so
    0x2804e000 /libexec/ld-elf.so.1
    
    Heap at VM Abort:
    Heap
    def new generation total 4288K, used 1920K [0x2c430000, 0x2c8d0000, 0x2d7e0000)
    eden space 3840K, 48% used [0x2c430000, 0x2c5fd4b8, 0x2c7f0000)
    from space 448K, 16% used [0x2c860000, 0x2c872e60, 0x2c8d0000)
    to space 448K, 0% used [0x2c7f0000, 0x2c7f0000, 0x2c860000)
    tenured generation total 54720K, used 34048K [0x2d7e0000, 0x30d50000, 0x3c430000)
    the space 54720K, 62% used [0x2d7e0000, 0x2f9202d0, 0x2f920400, 0x30d50000)
    compacting perm gen total 6400K, used 6241K [0x3c430000, 0x3ca70000, 0x40430000)
    the space 6400K, 97% used [0x3c430000, 0x3ca48568, 0x3ca48600, 0x3ca70000)
    
    Local Time = Wed Apr 7 13:18:48 2004
    Elapsed Time = 2786
    #
    # The exception above was detected in native code outside the VM
    #
    # Java VM: Java HotSpot(TM) Client VM (1.4.2-p6-root_12_mar_2004_07_21 mixed mode)
    #
    bash-2.05b$ exit
    
    Script done on Wed Apr 7 13:42:24 2004
    
    Loaded symbols for /libexec/ld-elf.so.1
    #0 0x2809a42f in pthread_testcancel () from /usr/lib/libpthread.so.1
    (gdb) bt
    #0 0x2809a42f in pthread_testcancel () from /usr/lib/libpthread.so.1
    #1 0x2808c8c1 in sigaction () from /usr/lib/libpthread.so.1
    #2 0x28086cf5 in pthread_kill () from /usr/lib/libpthread.so.1
    #3 0x280866e0 in raise () from /usr/lib/libpthread.so.1
    #4 0x28148b07 in abort () from /lib/libc.so.5
    #5 0x2845eae2 in os::abort(int) ()
    from /usr/local/jdk1.4.2/jre/lib/i386/client/libjvm.so
    #6 0x2845c9e4 in os::handle_unexpected_exception(Thread*, int, unsigned char*, void*) () from /usr/local/jdk1.4.2/jre/lib/i386/client/libjvm.so
    #7 0x28460ff5 in JVM_handle_bsd_signal ()
    from /usr/local/jdk1.4.2/jre/lib/i386/client/libjvm.so
    #8 0x2845fa7d in signalHandler ()
    from /usr/local/jdk1.4.2/jre/lib/i386/client/libjvm.so
    #9 0x2808b513 in sigaction () from /usr/lib/libpthread.so.1
    #10 0x2808b3ba in sigaction () from /usr/lib/libpthread.so.1
    #11 0x2808be89 in sigaction () from /usr/lib/libpthread.so.1
    #12 0x28093767 in pthread_mutexattr_init () from /usr/lib/libpthread.so.1
    #13 0x280936b2 in pthread_mutexattr_init () from /usr/lib/libpthread.so.1
    #14 0x28135363 in _ctx_start () from /lib/libc.so.5
    #15 0x2816cd84 in __isthreaded () from /lib/libc.so.5
    
    --Boundary-00=_CsGdAwPnbap1q+D
    Content-Type: text/plain; charset="us-ascii"
    MIME-Version: 1.0
    Content-Transfer-Encoding: 7bit
    Content-Disposition: inline
    
    _______________________________________________
    email***@***.com mailing list
    http://lists.freebsd.org/mailman/listinfo/freebsd-java
    To unsubscribe, send any mail to "email***@***.com"
    
    --Boundary-00=_CsGdAwPnbap1q+D--
- 13
  - Force Reload on JSP Pages?I've noticed this odd behavior when working on my Web application, where if
    a JSP page was cache-able then the servlet would never run. I guess this is
    normal since the browser assumes the page doesn't change, so it doesn't put
    a request in to the server.
    
    But I'm curious. Is there some command or perhaps a server config that would
    allow all JSP pages, whether cached or not, to always reload? I hope this
    makes sense, if more is required, I'd be glad to explain more. Thanks for
    any assistance in advance!
    
    Emery.
    /\^/\^/\
    Sun Certified Java Programmer
    www.websamba.com/javarobotics/
    E-stronomy - Astronomical Resources
    www.websamba.com/e-stronomy/
- 15
  - Java performanceLasse Reichstein Nielsen <email***@***.com> writes:
    
    > Roedy Green <email***@***.com> writes:
    >
    >> On Sun, 04 Nov 2007 09:21:55 -0800, Knute Johnson
    >> <email***@***.com> wrote, quoted or indirectly quoted
    >> someone who said :
    >>
    >>>The coming JRE is going to have greatly improved startup performance.
    >>>
    >>>https://jdk6.dev.java.net/6uNea.html
    >>
    >> "The Quick Starter feature will prefetch portions of the JRE into
    >> memory, substantially decreasing the average JRE cold start-up time
    >> (the time that it takes to launch a Java application for the first
    >> time after a fresh reboot of a PC)."
    >>
    >> Sounds like they are loading a pre-loaded RAM image to get the basic
    >> classes going. Yea! I have been asking for this since day 1.
    >
    > That, or they are making yet another "QuickStart" that loads and takes
    > up memory at boot time, whether you use it or not.
    > It can sit next to Office QuickStart, Firefox Quickstart and
    > a gazillion other programs that think they are so important that
    > you have to start everything but the GUI every time you start
    > your machine.
    
    Ack, I was hoping I was wrong. And I was, although only slightly so:
    
    "The fix, then, is for us to take advantage of the disk cache to make
    sure that the memory pages on disk that we must read at startup have
    already been loaded before we need them. How do we do this? We cannot
    magically pre-load the pages just prioir to launching; unfortunately,
    the VM currently lacks the ability to see into the future to detect
    when the user will be launching Java (we would love to have this
    feature in the future, but it is not yet present). But we can
    pre-load at some earlier time, such as Windows boot or login
    time. And we can keep the pages warm in the disk cache as machine and
    memory conditions allow."
    
    From <URL:http://weblogs.java.net/blog/chet/archive/2007/05/consumer_jre_le.html#Quickstarter>
    
    They do load everything into memory, only cache memory instead of
    program memory. And they then keep hitting the pages to ensure that
    no cache algorithm gets to do its job.
    That's just being egoistical. I bet every application wants to be
    loaded from RAM. Well, at least I get to turn it off.
    /L
    --
    Lasse Reichstein Nielsen - email***@***.com
    DHTML Death Colors: <URL:http://www.infimum.dk/HTML/rasterTriangleDOM.html>
    'Faith without judgement merely degrades the spirit divine.'
- 16
  - Passing by reference, more confusion...I have an object that's passed in to a function as a parameter i.e public
    boolean getProjectTitle(ProjectHeader_DTO obj) {...}
    
    If I then call a method on this object inside the function i.e
    obj.setTitle("test") then using obj.getTitle() from outside the function it
    displays the property set correctly!
    
    But doing something like this inside the function doesn't -
    
    ProjectHeader_DTO x = new ProjectHeader_DTO();
    x.setProjectTitle("test");
    obj=x;
    
    As long as I explictly set the properties it works but why not when
    assigning another object?
    
    Tried using the clone() method aswell & inside the function its works fine
    until after the return!
    
    I do not want the object to be return'ed from the function!
    
    Any ideas?
    
    thanks
    
    harry
- 16
  - Relationships using BMP Entity BeansHi,
    
    Is there anyway to create a relationship between two BMP Entity Beans?
    I know that CMP Entity Beans 2.0 supports relationships throgh CMR
    fields, but I didn't find a way to do the same with BMP.
    
    Anybody knows?
    
    Thanks,
    
    Joan

Author

Message

Arne Vajh鴍

Posted: 2008-6-26 8:11:00

Top

java-programmer, Daylight Savings Time in Calendar Philipp wrote:
> Philipp wrote:
>> John B. Matthews wrote:
>> So I really want to take any locale and remove the DST (only if there
>> is one).
>>
>> I know of a workaround which is to write:
>>
>> cal.setTimeInMillis(now.getTime() - cal.get(Calendar.DST_OFFSET));
>>
>> but this is ugly as I am actually changing the timestamp and not the
>> representation of the timestamp.
>
> Update: this workaround is actually wrong during one hour at the time
> change period. So it's not a good solution. If anybody knows of a better
> one, I'd be happy to use it.

DateFormat df = new SimpleDateFormat("HH");
TimeZone tz = TimeZone.getTimeZone("GMT");
tz.setRawOffset(cal.getTimeZone().getRawOffset());
df.setTimeZone(tz);
System.out.println(df.format(cal.getTime()));

Arne

Arne Vajh鴍

Posted: 2008-6-26 8:11:00

Top

java-programmer >> Daylight Savings Time in Calendar Philipp wrote:
> Philipp wrote:
>> John B. Matthews wrote:
>> So I really want to take any locale and remove the DST (only if there
>> is one).
>>
>> I know of a workaround which is to write:
>>
>> cal.setTimeInMillis(now.getTime() - cal.get(Calendar.DST_OFFSET));
>>
>> but this is ugly as I am actually changing the timestamp and not the
>> representation of the timestamp.
>
> Update: this workaround is actually wrong during one hour at the time
> change period. So it's not a good solution. If anybody knows of a better
> one, I'd be happy to use it.

DateFormat df = new SimpleDateFormat("HH");
TimeZone tz = TimeZone.getTimeZone("GMT");
tz.setRawOffset(cal.getTimeZone().getRawOffset());
df.setTimeZone(tz);
System.out.println(df.format(cal.getTime()));

Arne

Philipp

Posted: 2008-6-26 22:53:00

Top

java-programmer >> Daylight Savings Time in Calendar Arne Vajh鴍 wrote:
> Philipp wrote:
>> Philipp wrote:
>>> John B. Matthews wrote:
>>> So I really want to take any locale and remove the DST (only if
>>> there is one).
>>>
>>> I know of a workaround which is to write:
>>>
>>> cal.setTimeInMillis(now.getTime() - cal.get(Calendar.DST_OFFSET));
>>>
>>> but this is ugly as I am actually changing the timestamp and not the
>>> representation of the timestamp.
>>
>> Update: this workaround is actually wrong during one hour at the time
>> change period. So it's not a good solution. If anybody knows of a
>> better one, I'd be happy to use it.
>
> DateFormat df = new SimpleDateFormat("HH");
> TimeZone tz = TimeZone.getTimeZone("GMT");
> tz.setRawOffset(cal.getTimeZone().getRawOffset());
> df.setTimeZone(tz);
> System.out.println(df.format(cal.getTime()));
>
> Arne

Thank you Arne, this works perfect!
I somehow missed the setRawOffset() in TimeZone and thus thought that
TimeZones were immutable.

Phil

Index ‹ java-programmer

Next
- 1
  - tomcat plugin for eclipse - tomcat not startingHi,
    
    Tomcat is not starting from eclipse ide.
    
    my configurations are
    
    eclipse sdk3.1.2
    j2sdk1.4.2_10
    tomcat5.5.15
    sysdeo plugin is tomcatplugin 4.1.30.1
    
    I have unzipped the sysdeo plugin into plugins dir of eclipse and have
    done all the configuration as given in docs..but when i try to start
    tomcat from start button of tomcat ...from eclipse its not getting
    started..
    
    please ,some one help me work this one out.
    patrick
    
    Error is
    Error 2006-03-27 23:18:56.267 org.eclipse.core.runtime.CoreException:
    Error occurred during initialization of VM
    java/lang/NoClassDefFoundError: java/lang/Object
    
    at
    org.eclipse.jdt.launching.AbstractVMRunner.abort(AbstractVMRunner.java:47)
    at
    org.eclipse.jdt.internal.launching.StandardVMDebugger.checkErrorMessage(StandardVMDebugger.java:322)
    at
    org.eclipse.jdt.internal.launching.StandardVMDebugger.run(StandardVMDebugger.java:236)
    at
    com.sysdeo.eclipse.tomcat.VMLauncherUtility.runVM(VMLauncherUtility.java:81)
    at
    com.sysdeo.eclipse.tomcat.TomcatBootstrap.runTomcatBootsrap(TomcatBootstrap.java:186)
    at
    com.sysdeo.eclipse.tomcat.TomcatBootstrap.start(TomcatBootstrap.java:79)
    at
    com.sysdeo.eclipse.tomcat.actions.StartActionDelegate.run(StartActionDelegate.java:38)
    at
    org.eclipse.ui.internal.PluginAction.runWithEvent(PluginAction.java:246)
    at
    org.eclipse.ui.internal.WWinPluginAction.runWithEvent(WWinPluginAction.java:223)
    at
    org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:538)
    at
    org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:488)
    at
    org.eclipse.jface.action.ActionContributionItem$6.handleEvent(ActionContributionItem.java:441)
    at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:66)
    at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:843)
    at
    org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3125)
    at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2758)
    at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:1699)
    at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:1663)
    at
    org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:367)
    at
    org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:143)
    at
    org.eclipse.ui.internal.ide.IDEApplication.run(IDEApplication.java:103)
    at
    org.eclipse.core.internal.runtime.PlatformActivator$1.run(PlatformActivator.java:226)
    at
    org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:376)
    at
    org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:163)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.eclipse.core.launcher.Main.invokeFramework(Main.java:334)
    at org.eclipse.core.launcher.Main.basicRun(Main.java:278)
    at org.eclipse.core.launcher.Main.run(Main.java:973)
    at org.eclipse.core.launcher.Main.main(Main.java:948)
    
    Error 2006-03-27 23:18:56.257 Impossible to start Tomcat
    Check home directory setup in Tomcat preference page/n
- 2
  - java/115558: linux-sun-jdk-1.6.0.02 is incorrectly marked as
    >Number: 115558
    >Category: java
    >Synopsis: linux-sun-jdk-1.6.0.02 is incorrectly marked as vulnerable
    >Confidential: no
    >Severity: non-critical
    >Priority: medium
    >Responsible: freebsd-java
    >State: open
    >Quarter:
    >Keywords:
    >Date-Required:
    >Class: sw-bug
    >Submitter-Id: current-users
    >Arrival-Date: Wed Aug 15 18:20:00 GMT 2007
    >Closed-Date:
    >Last-Modified:
    >Originator: Ronald Klop
    >Release: FreeBSD 6.2-STABLE i386
    >Organization:
    >Environment:
    
    System: FreeBSD 6.2-STABLE #29: Sat Jul 14 14:44:18 CEST 2007
    email***@***.com:/usr/obj/usr/src/sys/GUIDO
    
    >Description:
    
    I don't know if this is a 'java' issue or a 'ports' issue, sorry if the category is wrong.
    
    But, the port linux-sun-jdk-1.6.0.02 is marked as vulnerable by portaudit/vuxml which is incorrect I think.
    
    # portaudit -adF
    auditfile.tbz 100% of 43 kB 30 kBps
    New database installed.
    Database created: Tue Aug 14 01:10:01 CEST 2007
    Affected package: linux-sun-jdk-1.6.0.02
    Type of problem: jdk -- jar directory traversal .
    Reference: <http://www.FreeBSD.org/ports/portaudit/18e5428f-ae7c-11d9-837d-000e0c2e438a.html>
    
    >How-To-Repeat:
    
    install portaudit
    try to install linux-sun-jdk-1.6.0; this will not succeed, because portaudit thinks the port is vulnerable
    
    >Fix:
    
    Fix the versions of the vulnerability.
    
    >Release-Note:
    >Audit-Trail:
    >Unformatted:
    _______________________________________________
    email***@***.com mailing list
    http://lists.freebsd.org/mailman/listinfo/freebsd-java
    To unsubscribe, send any mail to "email***@***.com"
- 3
  - MessageBoxHi,
    
    Call me stupid but where can I find the messagebox in Java?? Or do I have to
    create one myself? What I need is a simple function just like Alert( "I'm
    annoying!" ); in JavaScript.
    
    Greetings,
    Rick
- 4
  - Threads not running in starting order (?)Hi!
    
    Below I do start Thread t1 before t2. t1 tries to call print1() on a
    Printer object and t1 print2() but only the first will success since it
    obtains a lock on the Printer object. I'm surprised that although t1 is
    started first the code prints "2". If I put a sleep(5) between the
    starting of the threads t1 wins the race.
    
    Can somebody explain?
    
    public class SyncThreadTest
    {
    public static void main( String[] args )
    {
    new SyncThreadTest().go();
    }
    
    private void go()
    {
    Thread t1 = new Thread( new Runner( 1 ) );
    Thread t2 = new Thread( new Runner( 2 ) );
    System.out.println(t1.toString());
    t1.start();
    
    System.out.println(t2.toString());
    t2.start();
    }
    
    class Runner implements Runnable
    {
    int i = 0;
    
    public Runner( int i )
    {
    this.i = i;
    }
    
    public void run()
    {
    // Printer p = Printer.getInstance();
    Printer p = new Printer();
    // synchronized( p )
    // synchronized( Printer.class )
    synchronized( p.MUTEX )
    {
    while( true )
    {
    System.out.println(toString());
    if( i == 1 ) p.print1();
    else p.print2();
    
    try
    {
    Thread.sleep( 500 );
    }
    catch( InterruptedException e )
    {
    }
    }
    }
    }
    }
    }
    
    class Printer
    {
    private static final Printer instance = new Printer();
    
    public static final Object MUTEX = new Object();
    
    public static Printer getInstance()
    {
    return instance;
    }
    
    public synchronized void print1()
    {
    System.out.println( 1 );
    }
    
    public synchronized void print2()
    {
    System.out.println( 2 );
    }
    }
- 5
  - freebsd eclipse plugins & mailing listVizion wrote:
    > On Thursday 25 August 2005 18:41, the author David Wolfskill contributed to
    > the dialogue on-
    > Re: freebsd eclipse plugins & mailing list:
    >
    >
    >>[Sorry about cluttering a technical list with administrivia, but it
    >>seemed appropriate under the current circumstances. -- postmaster]
    >>
    >>On Thu, Aug 25, 2005 at 04:00:10PM -0700, Vizion wrote:
    >>
    >>>...
    >>>
    >>>
    >>>>>Personally I would be in favor of also creating a
    >>>>>email***@***.com mailing list but I am not certain how much
    >>>>>interest there might be. If there is enough support I would be willing
    >>>>>to help set it up.
    >>>>
    >>>>You may be willing to help set it up, but only the FreeBSD postmaster(s)
    >>>>can actually do so :). I personally don't see enough interest for a
    >>>>separate mailing list,
    >>>
    >>>How can we find if there is enough interest without creating the list?
    >>>Eclipse is now a very serious EDI which is suitable for all kinds of
    >>>development. Frankly I am dissappointed that freebsd has not been more
    >>>active in the eclipse field. The lack of plugin support in the ports tree
    >>>is a major deterent.
    >>
    >>Regardless of the structure of the ports tree or anything else, my basic
    >>criterion for new list creation is this: Would creation of the new list
    >>help the FreeBSD project more than retaining the status quo would?
    >
    >
    > Well I think definitely yes. If you need any proof of its significance for
    > developers of any project I would suggest you take a look at the eclipse site
    > www.eclipse.org and at the links from that site. As to helping the freebsd
    > project a search through the eclipse website on Linux will tell you how much
    > support that community has gained through their involvement of a core of
    > linux deveopers in the eclipse community.
    >
    >
    >>If the answer is yes, then I am strongly in favor of cretaing it -- to
    >>the point that unless someone in core@ or admin@ tells me not to, I
    >>will create the list.
    >
    >
    > So please will you create the list as quickly as possible and hopefully we can
    > promulgate its presence on the many eclipse forums.
    >
    >>However, I have been so far "out of the loop" with respect to
    >>"development environments" and the like ... well, no; that's not right:
    >>I was never "in the loop." What "development" I do (generally in Perl)
    >>is done in multiple xterm windows editing files with vi.
    >
    >
    > You might find the eclipse edi in conjunction with the perl and php plugins
    > very very usefuland a tremendous advance on using multiple xterms with vi.
    > The one EDI will control all the development tasks and maintain a development
    > history... very neat.
    >
    >>So: for folks who have an opinion -- persuade me. No, this isn't a
    >>"vote;" I don't care about that. Write to me about what the presence of
    >>the new list will do for the FreeBSD project ... for good or for ill.
    >>Be honest about it.
    >
    >
    > Eclipse is multi- faceted -- but is developed on a Java platform. However it
    > is out of place in the Freebsd-java mailing list... every plugin needs to be
    > discussed in the context of eclipse as a whole and the various plugins. The
    > absense of a list means that Freebsd users are not able to benefit from the
    > mutually support it can create to ensure freebsd developers are able to use
    > the latest tools -- whether you develop in C of C++, or java, xul, sml, http
    > php, or whatever there is an e clipse tool to help.
    >
    >
    >>Note that I set Reply-To on purpose -- there's no
    >>need to clutter FreeBSD.org technical mailing lists with opinions about
    >>the creation of a mailing list.
    >
    >
    > I have posted this to the freebsd java list but will ask anyone who joins in
    > to delete that from the cc list and add their name to the cc list
    >
    >>Chances are, I'll create the list --
    >
    >
    > please do
    >
    >>I recently created one dedicated to
    >>the Proliant line of hardware (of all things). So if you can convince
    >>me that Eclipse has a following at least comparable to Proliant
    >>hardware, you're probably golden. Remember, the salient criterion is
    >>"Overall, does creation of the new list help the FreeBSD project?"
    >>
    >>
    >>>I know a number of developers who have moved from freebsd to linux just
    >>>because freebsd has not kept up with this very powerful EDI.
    >>>Who should I email to request a new list? ( I have cc'd
    >>>email***@***.com )
    >>
    >>I noticed. :-}
    >>
    >>
    >>>If there is no hope then I suppose I could start an independent mail list
    >>>- but that idea goes against the grain!
    >>
    >>Right. I appreciate your restraint.
    >>
    >>
    >>>....
    >>>
    >>>--
    >>>40 yrs navigating and computing in blue waters.
    >>>English Owner & Captain of British Registered 60' bluewater Ketch S/V
    >>>Taurus. Currently in San Diego, CA. Sailing bound for Europe via Panama
    >>>Canal after completing engineroom refit.
    >>
    >>Heh. Sorry about the need for the refit, but I've tended to have a bit
    >>of a "soft spot" for ketches. Not that I've actually sailed one,
    >>unfortunately.
    >
    >
    > Ah well if you are near San Diego in a couple of months (when the engine is
    > done, I'll be glad to welcome you aboard
    >
    > David
    
    I understand and sympathize with what you are trying to achieve, but I
    believe you are barking on the wrong tree here. Eclipse on FreeBSD has
    been in a rather good shape for at least the last two years that I have
    been using it:
    
    - The IDE port gets updated a few days or weeks after the official release.
    - The various milestone releases from the development version are
    usually ported as well.
    - Many different plugins exist in the ports tree for Eclipse.
    
    I also believe that people do get help when posting to freebsd-java
    about eclipse and I'll make sure the same thing happens on
    freebsd-ports. There are some things that could be improved however, like:
    
    - Faster response to open PRs.
    - More people working on porting the platform or the plugins.
    - Official support from the eclipse.org site.
    
    The first two are not going to be improved by a new mailing list, since
    a mailing list by itself does not spark new interest on a topic. I'm
    afraid that they may be harmed instead, since there might not be many
    (or any at all) subscribers to that list that are also ports committers.
    The way things usually work in FreeBSD-land for contributors without a
    commit bit, is that you submit an improvement, try to get the attention
    of a committer and then work with him through any details. The committer
    attention is not something you get very easily, especially if you
    consider how many lists these people are usually subscribed to.
    
    Don't get me wrong, I will subscribe if such a list is created, but I
    fail to see the need for it. Check out the archives of freebsd-apache,
    freebsd-rc, freebsd-python and freebsd-perl for examples on the nature
    and the amount of postings I expect we will get. Do we need a new list
    for such an amount of e-mails?
    
    Regards,
    
    Panagiotis
- 6
  - Getting HTML title using HTMLEditorKit.ParserCallbackI am parsing an HTML file using ParseDelegator and a ParserCallback. I am
    trying to get the document title and the HREF links. The ParserCallback is
    successfully getting the HREF, so I know it is basically working. However,
    when I try to get the title, I always get back null. Here is the relevant
    code of the ParserCallback subclass. Anyone have any clue as to what I'm
    doing wrong?
    
    public void handleStartTag(HTML.Tag tag,
    MutableAttributeSet attrSet, int pos)
    {
    if (tag == HTML.Tag.TITLE)
    {
    urlTitle = (String)attrSet.getAttribute(HTML.Attribute.TITLE);
    System.out.println("attrSet: " + attrSet); // prints ""
    System.out.println("found title: " + urlTitle); // prints null
    }
    if (tag == HTML.Tag.A)
    {
    // This successfully gets the target URL
    String targetURLStr =
    (String)attrSet.getAttribute(HTML.Attribute.HREF);
    }
    
    }
    
    --
    Bill Tschumy
    Otherwise -- Austin, TX
    http://www.otherwise.com
- 7
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- 8
  - TCP Keep Alive probesHi All,
    
    I have a java client app and want to send TCP Keep Alive probes to my
    server every 10 minutes as opposed to the default 2 hours. I see a
    setKeepAlive() call in the API, but that only turns on whether you want
    to send Keep Alives or not. How do i specify the Keep Alive probe
    interval?
    
    Thanks,
    
    Grant.
- 9
  - Slashdot says Nyet to MonoNot that I particularly care anymore, especially given the very strong
    push by Java in open source circles (e.g. Apache's planned J2EE
    Geronimo app server and Red Hat's plan to create an open source Java),
    but it seems a lot of open source advocates in slashdot seem to feel
    the same way I do - Mono is a useless and doomed project that is also
    rendered dangerous for Linux by the Microsoft patents hanging over it.
    
    http://www.freeroller.net/page/kalimantan/20030914#slashdot_says_nyet_to_mono
- 10
  - Why Linux + Javaasj wrote:
    
    > Yes, a smartcard runs a 30 MB JVM....get a clue and read about it
    > before you post.
    > I suppose these Java SPOT (smart programmable objects) have a 30 MB JVM
    > too?
    
    forgot the link:
    http://sunspotworld.com/
    
    > I suppose a lower end mobile phone runs a 30 MB JVM?
- 11
  - Java and JSP to MySQL databaseDear all,
    
    I am planning to build my web application with the following
    architecture:
    
    Redhat Linux 9.0 platform
    Apache Tomcat Web Server
    MySQL database
    JSP with Java for writing the web page
    
    But unfortunately, I encountered some problems in properly linking my
    JSP to the mysql database. I have installed the JDBC connector
    interface already.
    I would apperciate if anyone can give me some hints on the proper set
    up and configuring of the architecture.
    
    Thanks a lot.
    
    Ivan
- 12
  - right click menu not highlightingIm working with a jtree and I have added the jpopupmenu to the jtree
    object.
    
    When I right click a node the menu comes up appropriately, it even
    accepts clicks and performs the appropriate action. The only thing
    that isnt working is the right menu highlighting when I have the mouse
    over the menu items...
    
    Im wondering if there is some place in my code where I perhaps overrode
    some code that would typically be responsible for highlighting the
    right click menu... I implemented a little drag and drop functionality
    for the jtree, could this be messing with the highlighting of the menu?
    
    Thanks
- 13
  - float to int conversionSystem.out.println(new Float(21082007.0).intValue()); // -> 21082008
    System.out.println(new Double(21082007.0).intValue()); // -> 21082007
    
    Why?
    
    System.out.println(new BigDecimal(21082007.0F).intValue()); // ->
    21082008
    System.out.println(new BigDecimal(21082007.0D).intValue()); // ->
    21082007
    
    Again, why?
    
    And what's the proper way of doing it, using always a double?
    
    Thanks in advance
- 14
  - What Says The Blame America First Crowd?In comp.lang.java.advocacy, Luke Tulkas
    <email***@***.com>
    wrote
    on Wed, 31 Mar 2004 15:36:37 +0200
    <c4ehh5$2gef62$email***@***.com>:
    > "Phil Earnhardt" <email***@***.com> wrote in message
    > news:email***@***.com...
    >
    >> >> 7. You acted (and are still acting) dumb.
    >> >
    >> >No, wait, you _are_ dumb.
    >>
    >> You continue to paint a caricature of the Far Left
    >
    > Far Left? Whatsthat?
    
    Presumably anyone who thinks that Rush Limbaugh is not The Voice Of God. :-)
    
    Although in all fairness he more likely was referring
    to those individuals who think, among other things, that
    socialism/communism cures all ills, admires/admired Mao
    Zedong and Lenin (*not* Stalin, who corrupted the notion),
    and thinks that $100M/yr CEOs are obscenely overpaid.
    
    (I've wondered, though: in a communistic economy, why would there
    be any need of money at all, except for dealing with the other
    countries? The existence of the ruble appeared to be a kludge;
    of course now that Russia's capitalist, it's a moot point.
    Not sure regarding the CEOs; I'd have to look. I wouldn't mind
    $100M a year but I'm not a CEO...and I know which system works
    better. If it's not obvious, look at N Korea and S Korea, and
    then tell me which one's starving :-) . The weird bit is, the
    US Prez only gets about *$400K*....)
    
    >
    >> that is very
    >> unattractive: someone who fervently holds on to their beliefs but
    >> demonstrates time and time again that they really have no idea what
    >> they're talking about.
    >>
    >> This posting demonstrates another attribute of that charicature:
    >> rather than debating the points that I made, you instead resort to ad
    >> hominom attacks.
    >
    > Sometimes a man's gotta do what a man's gotta do. In this case, face you
    > with hard facts about your sanity. No use trying to have a serious
    > conversation if all you do is demonstrating your repeat-copy-paste
    > skills. On top of your countless brainfarts.
    >
    >> Luke: you're demonstrating the fundamental irony of the Political
    >> Correctness movement.
    >
    > Me politically correct? You must be confusing me with somebody else.
    >
    > [snip]
    >
    
    --
    #191, email***@***.com
    It's still legal to go .sigless.
- 15
  - Short question about JSliderHi,
    
    I have a problem with the font of JSlider labels.
    This code compiles but does not work and I am wondering how I can set
    the label font :
    
    JSlider s = new JSlider(JSlider.HORIZONTAL,min,max,value);
    Font f = new Font("Monaco", Font.PLAIN,9);
    s.setFont(f);
    ...
    
    Thanks for your help and suggestions