Is a way to get some classes loaded?

I run into a problem today. After the main class is up, a "java.lang.NoClassDefFoundError" exception is thrown while running. The class is located in the same directory as the main class.
After I turn on the verbose option, I find the class is not loaded at the point when the main class is up. Although it is loaded after the exception occurs, the exception still occurs.
I guess for the limited memory reason not all classes are loaded. Is any way I can get some classes loaded first?
Thanks for your input.
v.

This will not help you current problem, which sounds like either a class path problem, but
Is any way I can get some classes loaded first?To get a class to be loaded by the JVM, you can use Class.forName("class name"). To force it to load early in the application life (not first, as the main + Java classes will come before it) use the static initalizer, i.e.class Main {
static {
Class.forName("Jeff");
}Your second, unloading class, is it packaged correctly? And has it be compiled?

Similar Messages

Getting all classes loaded by ClassLoader?

How do you get an array of type (Class []) that represents all the classes loaded by a ClassLoader?
Thanks
neofreezer

but if you do, that means that u can't load classes whose packages start with 'java.'!

Way to get list classes in Application?

Is there a way to list all the classes in the application (all the imports)?
I would like to be able to get ahold of a list of the classes using the Compiler API or just in Actionscript.
Thanks for your help,
Lance

One option is to look at a link-report. It basically tells you all the classes that get linked in to a swf (and all the dependencies each class has). It's a compiler option, and you can find out more info about it here: http://livedocs.adobe.com/flex/3/html/help.html?content=performance_06.html . There are also some application written to help make more sense of this file, like: http://joeberkovitz.com/blog/2008/03/26/itdepends-code-dependency-analysis-for-flexair-app lications/
Hope that helps,
Ryan

Question: is there any way to get entity class in JPQL query

Hello, I'm using J*dev 11gR1 adn JPA with EclipceLink*.
Let's consider such example
@Entity
@Table(name="ANIMALS")
@Inheritance(strategy = InheritanceType.TABLE_PER_CLASS)
public class Animal implements Serializable {
@Entity
@Table(name = "CATS")
public class Cat extends Animal implements Serializable{
@Entity
@Table(name = "DOGS")
public class Dog extends Animal implements Serializable{
}I need to build a query which will be translated to something like this SQL query:
SELECT * FROM CATS
UNION ALL
SELECT * FROM DOGS
ORDER BY ...So I need a way to query not all child entities from DB.
P.S. Yes, I know, that I can execute query on panent entity (select a from Animal a order by ...) and then loop throught the result list and delete not needed objects OR I can execute some queries on needed child entities and then merge them into one list and sort it, BUT both ways it will be much slower than generetion of needed SQL query straight to DB.
I know, that in Hibernate's HQL there is a way to build such query with something like this:
select * from Animal a where a.class = Cat or a.class = Dog

In JPA 2.0 which we are implementing right now you will be able to execute queries like:
SELECT a FROM Animal a WHERE TYPE(a) IN (Cat, Dog)The next draft of the specification contains a section which describes the feature in detail and provides more examples of its use:
4.6.17.4 Entity Type Expressions
An entity type expression can be used to restrict query polymorphism. The TYPE operator returns the
exact type of the argument.I have also been working with some customers on similar capabilities using the current versions of EclipseLink. The examples are documented here:
http://wiki.eclipse.org/EclipseLink/Development/JPA/QueryDownCast
I hope this helps,
Doug

Bricked new Iphone 4 during update, any way to get some life in it?

Bought two Iphone 4, and was setting them up.
First part went Ok recognized and Itune suggested firmware update.
Well update crashed with a error and now the phone just comes up with connect to itunes symbol screen and nothing happens when you plug it in it does not show up in itunes under devices any more.
Itunes works and ports because if I connect the other new phone you get a msg about it in itunes, so the total dead thing is rather certain the phone.
Spent some time searching to see if I could find some button reset other than the 10 sec power + circle one but no luck.
So is there any software, key-press that can un-brick the phone or is it back to store that is the solution?
Does not feel as a good idea to try with the other phone unless this first is solved, at least it functions as a "test tool" to see that itunes and port is working

First,
Thanks for answering!
Played around some more and can now get iTunes to reqgonize the phone and it then say it have to be restored:
Well I now have an error: 1604 and googled a bit and also had a look around so this is the content of a logfile:
+2010-12-26 02:49:07.468 [3212:c90]: restore library built Oct 15 2010 at 22:47:15+
+2010-12-26 02:49:07.468 [3212:c90]: iTunes: iTunes 10.1.1.4+
+2010-12-26 02:49:07.468 [3212:c90]: iTunes: Software payload version: 8C148+
+2010-12-26 02:49:59.312 [3212:9b4]: iTunes: Specifying UOI boot image+
+2010-12-26 02:49:59.312 [3212:9b4]: * UUID 9B42F948-5394-FB46-8D9D-4B1BB6E00BE2 *+
+2010-12-26 02:49:59.312 [3212:9b4]: requested restore behavior: Erase+
+2010-12-26 02:49:59.312 [3212:9b4]: amai: AMAuthInstallBundlePersonalizePartial: build manifest specifies baseband skeyid: <CFData 096A0088 [01AC5078]>{length = 20, capacity = 20, bytes = 0x97ab34ac0693f5b03bfb726d4e2c254f14e270a1}+
+2010-12-26 02:49:59.343 [3212:9b4]: amai: AMAuthInstallPlatformCreateDataFromFileURL: can't resolve file+
+2010-12-26 02:49:59.359 [3212:9b4]: amai: AMAuthInstallDebugWriteObject: debug object written: c:\windows\TEMP\PerF.tmp\amai\debug\tss-request.plist+
+2010-12-26 02:50:00.375 [3212:9b4]: amai: tsssubmitjob: HttpQueryInfo returned 200+
+2010-12-26 02:50:01.000 [3212:9b4]: amai: AMAuthInstallRequestSendSync: received tss response (server version: 0.6.31-b11)+
+2010-12-26 02:50:01.062 [3212:9b4]: amai: AMAuthInstallDebugWriteObject: debug object written: c:\windows\TEMP\PerF.tmp\amai\debug\tss-response.plist+
+2010-12-26 02:50:02.312 [3212:a34]: iBoot build-version = iBoot-931.18.27+
+2010-12-26 02:50:02.312 [3212:a34]: iBoot build-style = RELEASE+
+2010-12-26 02:50:02.312 [3212:a34]: AMDeviceIoControl: GetOverlappedResult failed+
+2010-12-26 02:50:02.312 [3212:a34]: AMDeviceIoControl: pipe stall+
+2010-12-26 02:50:02.312 [3212:a34]: USBControlTransfer: error 31, usbd status c0000004+
+2010-12-26 02:50:02.312 [3212:a34]: command device request for 'getenv radio-error' failed: 2008+
+2010-12-26 02:50:02.312 [3212:a34]: radio-error not set+
+2010-12-26 02:50:02.312 [3212:a34]: unable to open device_map.txt: No such file or directory+
+2010-12-26 02:50:02.312 [3212:a34]: <Recovery Mode Device 092B0938>: production fused device+
+2010-12-26 02:50:02.312 [3212:a34]: interface has 1 endpoints, file pipe = 1+
+2010-12-26 02:50:02.312 [3212:a34]: <Recovery Mode Device 092B0938>: operation 4 progress -1+
+2010-12-26 02:50:02.359 [3212:a34]: bootstrapping restore with iBEC+
+2010-12-26 02:50:02.375 [3212:a34]: <Recovery Mode Device 092B0938>: operation 31 progress -1+
+2010-12-26 02:50:03.375 [3212:a34]: <Recovery Mode Device 092B0938>: Recovery mode succeeded+
+2010-12-26 02:55:03.515 [3212:c90]: iTunes: Restore error 1604+
It looks like there where no backup done, because if you move out what is in "iPhone Software Updates" single file exactly the same gets downloaded name: "iPhone3,14.2.1_8C148Restore.ipsw"
Which looks like the current new release and not the previous version v4.1 or something like that.
Worth mentioning is that I never entered the phone menus making any changes but took it out of the box mounted sim and went from there "obeying" the iTunes suggestion to update.

Weblogic Class Loader issues.

Hi all!
Let me explain my problem.
I have an EJB which has in its same Java package some support classes
& also a startup class. I created an EJB jar file (containing the home,
remote, bean, the deployment descriptors & the container generated stubs)
for deployment. I also compiled all the support classes & the startup class
into the /weblogic/myserver/serverclasses directory. I also added the
required entries in the weblogic.properties file for the startup class.
Now the problem is that the support classes & the startup class contain
methods & constructors which have package level access (i.e the default
access in Java). At runtime, when my bean tries to access one of these
methods, an IllegalAccessException is thrown.
I understand that this exception is thrown when one tries to access a
method which should not be accessed (like private/protected/cross-package
access). However, both the EJB & these classes are in the same package.
So this should not be thrown.
Now the next thing I thought is that the EJB & the support classes are
being loaded by 2 different classloaders. I guess the classes under
/weblogic/myserver/serverclasses are being loaded by the WebLogic
Server ClassLoader & the EJB bean classes are being loaded by the
specialized EJB ClassLoader.
Now my question is,
1) Is it the case that the WebLogic Server does not recognize that the
EJB Bean class is in the same package as the support classes because
they are loaded by 2 separate class loaders? Please note that the EJB
jar file does not contain any support classes - so there is no
duplicate classes here.
2) Is this a bug?
3) What should I do to prevent this problem?
Some workarounds that I have done are:
1) Copied the Bean.class (implementation class of EJB bean) into the
serverclasses directory. Now the server does not throw any
IllegalAccessException. -- This, however, does not appeal as a solution
since it looks like the Bean class is now being loaded by the WebLogic
Class Loader instead of from the EJB jar file.
2) I changed all the default package access methods to public methods.
Works like a charm. -- Problem is that this is a third party set of classes
which I would like to avoid modifying.
Hope this is not too confusing. Please let me know if you need any further info.
Thanks much in advance,
--Das

You have to tell WLAS where to load your new classes. You can change
          workingDir of your JSP configuration in weblogic.properties to point to your
          new class directory.
          Cheers - Wei
          Hyung-Jin Kim <[email protected]> wrote in message
          news:[email protected]..
          > It seems that if I compile a class that a JSP uses while Weblogic is
          > running, Weblogic's class loader has this nasty habit of caching/writing
          > the class that already has loaded into memory into:
          >
          > weblogic/myServer/classfiles
          >
          > Weblogic then refers to the older class file under the above directory
          > when the server is started again. Is there any way to turn this "class
          > loader caching" off in Weblogic? Thanks!
          >
          > -hjk
          >

Is there a way to get more storage room on a 16

I have recently bought an ipad air 16gb. I thought this would be perfect for traveling and that I could just download movies for me & my family to watch while on a plane or traveling in the car. I have gone through and deleted most of the apps (games for my daughter and myself) that we probably won't use a lot. I only have 4 movies downloaded and no music and I have 1 more movie I'd like to add. However, when I try to load it, I get a message telling me that I don't have enough storage. Is there any way to get some more storage without having to delete the purchased movies off as well.....please help!!

iPhone, iPad, and iPod: Understanding capacity
http://support.apple.com/kb/ht1867
How much space is used by your Other? You may be able to reduce.
How Do I Get Rid Of The “Other” Data Stored On My iPad Or iPhone?
http://tinyurl.com/85w6xwn
How to Remove “Other” Data from iPhone, iPad and iPod Touch
http://www.igeeksblog.com/how-to-remove-other-data-from-iphone/
With an iOS device, the “Other” space in iTunes is used to store things like documents, settings, caches, and a few other important items. If you sync lots of documents to apps like GoodReader, DropCopy, or anything else that reads external files, your storage use can skyrocket. With iOS 5/6/7, you can see exactly which applications are taking up the most space. Just head to Settings > General > Usage, and tap the button labeled Show All Apps. The storage section will show you the app and how much storage space it is taking up. Tap on the app name to get a description of the additional storage space being used by the app’s documents and data. You can remove the storage-hogging application and all of its data directly from this screen, or manually remove the data by opening the app. Some applications, especially those designed by Apple, will allow you to remove stored data by swiping from left to right on the item to reveal a Delete button.
What is “Other” and What Can I Do About It?
https://discussions.apple.com/docs/DOC-5142
iPhone or iPad Ran Out of Storage Space? Here’s How to Make Space Available Quickly
http://osxdaily.com/2012/06/02/iphone-ipad-ran-out-of-available-storage-space-ho w-to-fix-quick/
6 Tips to Free Up Tons of Storage Space on iPad, iPhone, and iPod Touch
http://osxdaily.com/2012/04/24/6-tips-free-up-storage-space-ipad-iphone-ipod-tou ch/
Also,
How to Clear Message/iMessage Cache on iPhone & iPad And Reclaim Lots of Free Space
http://www.igeeksblog.com/how-to-clear-message-imessage-cache-on-iphone-ipad/
What is Stored in iCloud and What is Not
https://sites.google.com/site/appleclubfhs/support/advice-and-articles/what-is-s tored-in-icloud
 Cheers, Tom

Is there a way of getting whatsapp on my ipad

i have a ipad 3 HD it's updated to iOS 6.1.3 i just want to know if there are ways of getting whatsapp on the ipad ... normally the hypes about that whatapps can only be used with the iphone etc.

I was not being sarcastic even though you might have thought I was.
Talking to developer of a product is alway better way of getting some to chance instead of ranting on the wrong forum.
Allan

Is there a way to prevent pages from loading slowly or not loading at all?

pages load extremely fast at first and its great but after a few min fire fox does not load or loads extremely slowly. there is only one way to get it to load and that is by opening and then closing a new tab.

Hey SchenkerBob,
It is possible to disable non-system fonts temporarily for all applications using the Font Book application. This article explains how to do so -
Mac Basics: Font Book - Apple Support
In particular -
Disable and enable specific fonts
In situations where you'd like to prevent a font from being available in applications, but you don't want to completely remove the font from your Mac, you can use Font Book to disable the font.
In Font Book, click "All Fonts" in the Collection column.
Click the name of the font in the Font column.
Choose Disable "Font Name" Family from the Edit menu.
Since it might be problematic to have to disable each font individually, you can create a collection of fonts and disable the collection. See the article for how to create a font collection -
Organize fonts as collections
When working with fonts, you may discover that you use certain fonts frequently, but rarely use others. To make it easier to find the font you are looking for, you can organize your fonts into collections.
From the Font Book File menu, choose New Collection.
Type in a name for the new collection.
Click "All Fonts" in the Collection column.
Drag the fonts that you want from the Font column onto the name of your new collection in the Collection column.
You can then disable collections of fonts -
You can also disable or enable all fonts in a collection: Click the name of the collection in the Collection column, then choose Disable "Collection Name" or EnableCollection Name" " from the Edit menu.
Thanks for using Apple Support Communities.
Happy computing,
Brett L

How to get the class file of jar file

hello all,
is there any way to get the class file of jar file,as we have when we compile a java file we get class file
same do we have any option to get the class file of jar file

A jar file is a zip archive, so you can uznip it or extract the contents with the command "jar" - if it is what you need.

HTMLLoader and embeded *.pdf file - get some info

Hi,
Is there any way to get some info from embeded in HTMLLoader *.pdf file ? I'm writing a small AIR application which need's for example number of a currently viewed pdf page. I'm using Flash Builder (trail version) and Adobe Reader 9 as a pdf browser. Of course I saw http://www.adobe.com/devnet/air/flex/quickstart/scripting_pdf.html but I'm using free Adobe Reader - not professional.
Thank for Your answers.

Yes, just after posting--and it solved the problem.
Thanks.

Get the Class of something i have in mind

i found 2 ways of getting the class of a type
1. return Class.forName("Boolean");
2. static Boolean aBoolean = new Boolean(true);
return aBoolean.getClass();
the first one throws an exception and in the second one i have to create a random object. is there a nicer way to do this?

You have to use the fully qualified class names with Class.forName... for Boolean it is java.lang.Boolean.
Two ways that don't create unnecessary objects:
1. return Class.forName("java.lang.Boolean");
2. return Boolean.class;
and if you wanted the class of the primitive type boolean you can use Boolean.TYPE or boolean.class...

Weblogic Class Loader caching/writing classes to weblogic/myServer/classfiles

It seems that if I compile a class that a JSP uses while Weblogic is
          running, Weblogic's class loader has this nasty habit of caching/writing
          the class that already has loaded into memory into:
          weblogic/myServer/classfiles
          Weblogic then refers to the older class file under the above directory
          when the server is started again. Is there any way to turn this "class
          loader caching" off in Weblogic? Thanks!
          -hjk


You have to tell WLAS where to load your new classes. You can change
          workingDir of your JSP configuration in weblogic.properties to point to your
          new class directory.
          Cheers - Wei
          Hyung-Jin Kim <[email protected]> wrote in message
          news:[email protected]..
          > It seems that if I compile a class that a JSP uses while Weblogic is
          > running, Weblogic's class loader has this nasty habit of caching/writing
          > the class that already has loaded into memory into:
          >
          > weblogic/myServer/classfiles
          >
          > Weblogic then refers to the older class file under the above directory
          > when the server is started again. Is there any way to turn this "class
          > loader caching" off in Weblogic? Thanks!
          >
          > -hjk
          >

C++ class loader ??

I have a somewhat unique problem which I've seeked a solution for but haven't found it yet, so here goes:
I have a distributed system which will load JARs from a database. The server component doing the loading is implemented in C++. So what I want to do is:
1. Launch JVM in my C++ server
2. Implement a ClassLoader in C++ for the dynamically retrieved JAR (note: the JAR will never be a file on the filesystem, but ONLY in memory)
3. Get a class from the JAR, cast it to a specific interface
4. If that doesn't throw an exception, I call methods of the specific interface
Step 2,3 I have NO clue on how to do. Pleas help.
TIA
/Rob

It's not a bad idea at all, although it seems a bit like a "workaround". I've managed to do a simple C++ program that loads JVM and gets hold of the JAR in the classpath, now the tricky thing is to supply that JAR from memory... I made my own FindClass method which gets the .class from within the JAR and extracts that .class supplying it to JNIs DefineClass method. But that doesn't work yet...
But your idea of getting a class loader via JNI is good, maybe there is one that can be supplied a bytestream...
/Rob

Need Support : class loading

Dear All
Is there a way to know the classes loaded in memory
( in the JRE ) at any time
Is there a tool or a code sample to do that
Any Help
Highly appreciated
thanx all

Hi!
Use -verbose flag when you run your program. Like this:
java -verbose YourClass
This prints full class names into the console at tha time, classes are loaded. Example print follows
[Loaded org.apache.xpath.objects.XNodeSet]
[Loaded org.apache.xpath.objects.XBoolean]
[Loaded org.apache.xpath.objects.XRTreeFrag]
[Loaded org.apache.xpath.objects.Comparator]
[Loaded org.apache.xpath.objects.NotEqualComparator]
-Raine-

Is a way to get some classes loaded?

Similar Messages

Maybe you are looking for