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Index ‹ java-programmer
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- 5
- "class not found".I'm getting the dreaded "class not found" error. I've Googled this
error and found that it's quite common, but not in exactly the way I
get it. My applets run fine on my machine, both when tested locally
via a local HTML file, and also when going to website, but gives the
"Class not found" error other machines. Anyone have any idea what
might be wrong?
I suspect it may be a codebase error, but I've tried the following in
my HTML file without success:
<APPLET CODE="moonCalendar.class"
name = "moonCalendar" WIDTH=1000 HEIGHT=350>
<APPLET CODE="moonCalendar.class" codebase="."
name = "moonCalendar" WIDTH=1000 HEIGHT=350>
<APPLET CODE="moonCalendar.class"
codebase="http://www.ckolchak.com"
name = "moonCalendar" WIDTH=1000 HEIGHT=350>
You can see if it works on your machine by going to:
http://www.ckolchak.com/astroCalendar.htm
- 5
- how to hide tabs in JTabbedTableHello all
I have a JTabbedTable with many tabs with JPanel in it. I want in a state,
only some tabs are shown and other states, other tabs are shown. I used
setVisible(boolean) but it does not work. could you please help
thank you
S.Hoa
- 5
- Could you write this sound applet?As a start, consider this simple QBASIC program that generates random
frequencies:
10 frequency = 40 + 400 * RND
20 SOUND frequency, 7
30 GOTO 10
That's fine - except that it plays over the PC speaker - the one that's
just there for the happy beep - and not through the sound card and
proper speakers. You can't control volume, either.
I wonder if anyone would be kind enough to translate the above three
line program into a Java applet. I would like to see whether it looks
simple enough for me to cope with.
If it looks as if I could cope with Java, I would then learn it, and try
to program a way of generating sounds from a mathematical sequence or
formula.
--
Chris
- 5
- 5
- pass by referenceAndreas Leitgeb wrote:
> Patricia Shanahan <email***@***.com> wrote:
>> The issue is more critical for people for whom "pass by reference" is
>> familiar language. They will think they know what it means, and have to
>> find out somehow that it means something entirely different, when
>> talking about Java, that it does when talking about other languages.
>
> By the way, this is also true for "reference" itself. They also have
> to learn that what Java calls a reference wouldn't be called that way
> in other languages, for exactly the reasons you wrote (null allowed,
> assignment-semantics).
Indeed, I think the choice of "reference" to mean "pointer or null" was
a bad one. It would have been better to call a pointer a pointer, and
note that it can be null.
For the benefit of people transitioning from C or C++, it may be
necessary to note that it does not have pointer arithmetic or unsafe
conversions.
> Why is it ok, to talk of references in Java, but have an entirely
> different meaning of "reference" in mind in context of the phrase
> "pass by reference"?
"pass by reference" (or more usually "call by reference") is a long
standing term with a meaning independent of the use of "reference" as a
freestanding term. I learned it long before I knew any language in which
one could actually have a reference. I don't see any reason why having
to learn a Java-specific meaning of reference should require people to
learn special meanings of other terms, especially when with have a
perfectly good phrase, "pass reference by value", that is only one word
longer and says *exactly* how Java behaves.
Patricia
- 5
- Linux/X-Windows unable to set focus on a modal form (Consulting $ anyone)It appears whenever a modal window is opened on Linux X-Windows the
focus is stolen from the window and you CANNOT use the keyboard or any
peice of code to return focus to the form - let alone set the focus in
the textbox.
This is not just for my modal forms but for something as fundamental
as JOptionPane or simple code like this:
JFileChooser chooser = new JFileChooser();
if (chooser.showOpenDialog(parentComponent) ==
JFileChooser.APPROVE_OPTION) {
}
From trolling through posts I can see no answers which is really sad
for Linux good for Microsoft I guess. How can we deploy on Linux if
you are forced to get carpal tunnel clicking on every form with the
mouse ?
I would be willing to pay some consulting dollars to get this
resolved.
Greg
- 5
- JRE versionsWe have in our company several applications that require JRE to work.
They have been developed by different people and some require specific
versions of Java to work correctly.
Normally the applications work well individually but sometimes, when we
need to work with some of them that require different JRE versions, we
are in trouble.
How can we deal with this problem? Why last versions of JRE are not
full compatible with the previous ones?
Greetings,
Samu
- 5
- You have received 5 notifications from your fans!Alyssa
<http://www.fanbox.com/socnet/EmailStat.aspx?cmp=&xyz=1&lit=5&me=xAr3pqu
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/NewCustomProfile.aspx?u=alyssawilcox591> sent you a fan request.
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ain.aspx?messages=3> to view Alyssa's profile and to accept or reject
her fan request.24 hours ago
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jU0kBSGmCF6dKsg==&fan=F1Qw1zM6IEk=&opg=http://profile.fanbox.com/profile
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her fan request. 24 hours ago
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<http://www.fanbox.com/socnet/EmailStat.aspx?cmp=&xyz=1&lit=5&me=xAr3pqu
jU0kBSGmCF6dKsg==&fan=F1Qw1zM6IEk=&opg=http://profile.fanbox.com/profile
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ain.aspx?messages=3> to view Alyssa's profile and to accept or reject
her fan request. 24 hours ago
There are 2 additional fan requests to review
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jU0kBSGmCF6dKsg==&fan=F1Qw1zM6IEk=&opg=http://profile.fanbox.com/Inbox/M
ain.aspx?messages=3> .
Click here to view ALL notifications
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jU0kBSGmCF6dKsg==&fan=F1Qw1zM6IEk=&opg=http://profile.fanbox.com/Inbox/M
ain.aspx?messages=> Change your Email Summary Settings
<http://www.fanbox.com/socnet/EmailStat.aspx?cmp=&xyz=4&lit=5&me=xAr3pqu
jU0kBSGmCF6dKsg==&fan=F1Qw1zM6IEk=&opg=http://profile.fanbox.com/Prefere
nces/Main.aspx?open=emailPref>
You can control
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jU0kBSGmCF6dKsg==&fan=F1Qw1zM6IEk=&opg=http://profile.fanbox.com/Prefere
nces/Main.aspx?open=emailPref> the frequency of these summary emails.
FanBox - 255 G Street #723, San Diego, CA 92101, USA
- 5
- IDE for Java?I downloaded the Sun product, and find it feature rich but slow. Can someone
recommend a more basic (freeware) IDE which will help a newbie without
hiding every bit of code? I can program my way out of a wet paper bag in a
few languages, but want to by-pass some of the learning curve for this
project.
- 8
- Intellij 5.1 compile time error..hi,
I am using Intellij 5.1 version. Each time I build the project I get
an error:
error: Compiling Web Module 'web':Invalid file
and the file is in the "deploy" folder
So each time I go into the folder and maually delete the .war file and
then when I build the project it works fine.
>From what I have seen one more person using the same version has this
problem. but the one's using the earlier versions don't have this
problem.
Is there any solution for this?
thanks,
- 10
- Beginner question about JDO best practiceDear all,
this is the first time I'm using JDO/ORM (the JPOX implementation) and
so have a question about best practice.
Let's assume we have a class "Tag" with the only property "String
name" and according setters and getters. The related table has two
columns "PRIMARY BIGINT tag_id" and "UNIQUE VARCHAR name". Note that
the column "name" is unique.
Let's further assume that we manually create some Tag objects during
application runtime. We now want to persist these objects but we don't
care if they are already persisted in the database. If this is the
case, JDO should just attach the object to the database instance. What
is the best practice to accommodate this? Do I have to manually check
every object for existence first? I would like to avoid this.
Let's say the tag "coffee" is already available in the database. I'm
looking for something which works like this:
--8<-snip->8--
Tag tag1 = new Tag( "java" );
Tag tag2 = new Tag( "means" );
Tag tag3 = new Tag( "coffee" );
// no problem
pm.makePersistent( tag1 );
// no problem
pm.makePersistent( tag2 );
// throws SQLException DUPLICATE KEY but should just attach/update
tag3 to database instance
pm.makePersistent( tag3 );
--8<-snip->8--
Thanks for any hint!
- 11
- Inline bytecode?Is it possible to do iline bytecode in Java? Sort of like inline asm
in c++, but platform independent.
- 15
- ports/69675: Eclipse slow typingSynopsis: Eclipse slow typing
Responsible-Changed-From-To: freebsd-ports-bugs->java
Responsible-Changed-By: ijliao
Responsible-Changed-When: Wed Jul 28 02:09:00 GMT 2004
Responsible-Changed-Why:
over to maintainer
http://www.freebsd.org/cgi/query-pr.cgi?pr=69675
_______________________________________________
email***@***.com mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-java
To unsubscribe, send any mail to "email***@***.com"
- 15
- JNI CallStaticVoidMethod fails after N callsI have written an application in Java and C on the Solaris 10 (x86)
platform using the JDK 1.5.0_09. The Java code calls a native method
"startButtonWatcher," which then forks, the parent process returning,
and the child process initiating an event loop that calls a static
method, "sendButtonEvent," on a Java class "ButtonWatcher."
The problem is that on the 65 invocation, the CallStaticVoidMethod will
hang. There is no core file or pid log file produced. (it will also
hang for CallVoidMethod as well if I remove the static declaration in
ButtonWatcher.)
I have also added a main() function to the C code so that it can be
compiled and run as an executable rather than a library file loaded
from Java, and the the same loop will be fine, the Call*Method call
being exected forever (or over a million times at least). The only
difference in the code is the JVM--in the sharable library, it uses the
JVM of the class that calls the native method, and the standalone has
to create its own. What could be the problem? Thanks!
- 15
- Java Object Persistence (JSP & Java)Hi all.
I'm currently working on a simulation with a web frontend. The
simulation is based on 3 components:
- A Webfrontend
- A persister (which is the object of my quetsio :-)
- A WorkHorse
The Workhorse is doing the actual simulation while the web frontend is
used to interact with the Simulation (queueing and dequeueing new
events to the simulation stack).
Now my question is what the best choice for the persister would be.
I found http://www.prevayler.org/wiki.jsp which looks nice but I don't
know if it's the best choice. Is there a library that transparently
saves and loads whole Object dependencies from an SQL Database, or is
an Object Cloud better?
What is your experience with this/other libraries?
|
| Author |
Message |
_Mario_
|
 Posted: 2004-7-20 0:29:00 |
Top |
java-programmer, Image from Web
Hi all, I need to read an image located in http://www.xxx.yyy/eee/test.jpg
...how can I do?
How can I display once readed in a swing interface?
thanks.
mario
|
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Andrew Thompson
|
| Posted: 2004-7-20 0:47:00 |
Top |
java-programmer >> Image from Web
On Mon, 19 Jul 2004 18:28:35 +0200, _Mario_ wrote:
> Hi all, I need to read an image located in http://www.xxx.yyy/eee/test.jpg
..
> How can I display once readed in a swing interface?
<sscce>
import javax.swing.*;
import java.net.*;
public class ShowImage {
// trying to create an URL might produce
// an exception, so throw it
public static void main(String args[])
throws MalformedURLException {
// construct the URL
URL url = new
URL("http://www.physci.org/codes/all_inc/codes.gif");
//make the frame
JFrame f = new JFrame();
// construct the icon
ImageIcon icon = new ImageIcon(url);
// add the icon to a label
JLabel picLabel = new JLabel( icon );
// add the label to the frame's cont pane
f.getContentPane().add( picLabel );
// pack the frame and make it visible
f.pack();
f.setVisible(true);
}
}
</sscce>
> thanks.
No worries..
--
Andrew Thompson
http://www.PhySci.org/ Open-source software suite
http://www.PhySci.org/codes/ Web & IT Help
http://www.1point1C.org/ Science & Technology
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_Mario_
|
| Posted: 2004-7-20 1:01:00 |
Top |
java-programmer >> Image from Web
Thanks!
I got this error on my new Pc (win XP)...:
java.lang.NoSuchMethodError: getAccessibleTableFromContext............
java.lang.NoSuchMethodError: getAccessibleTableFromContext
at com.sun.java.accessibility.AccessBridge.run(Native Method)
at java.lang.Thread.run(Unknown Source)
What could be?
How can I fix it? It seems that java cannot access my HD.... or web...
"Andrew Thompson" <email***@***.com> wrote in message
news:nwb38989220j$.jomvjvbbyntj$email***@***.com...
> On Mon, 19 Jul 2004 18:28:35 +0200, _Mario_ wrote:
>
> > Hi all, I need to read an image located in
http://www.xxx.yyy/eee/test.jpg
> ..
> > How can I display once readed in a swing interface?
>
> <sscce>
> import javax.swing.*;
> import java.net.*;
>
> public class ShowImage {
>
> // trying to create an URL might produce
> // an exception, so throw it
> public static void main(String args[])
> throws MalformedURLException {
>
> // construct the URL
> URL url = new
> URL("http://www.physci.org/codes/all_inc/codes.gif");
>
> //make the frame
> JFrame f = new JFrame();
> // construct the icon
> ImageIcon icon = new ImageIcon(url);
>
> // add the icon to a label
> JLabel picLabel = new JLabel( icon );
>
> // add the label to the frame's cont pane
> f.getContentPane().add( picLabel );
>
> // pack the frame and make it visible
> f.pack();
> f.setVisible(true);
> }
> }
> </sscce>
>
> > thanks.
>
> No worries..
>
> --
> Andrew Thompson
> http://www.PhySci.org/ Open-source software suite
> http://www.PhySci.org/codes/ Web & IT Help
> http://www.1point1C.org/ Science & Technology
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Andrew Thompson
|
| Posted: 2004-7-20 1:14:00 |
Top |
java-programmer >> Image from Web
On Mon, 19 Jul 2004 19:00:53 +0200, _Mario_ wrote:
Please do not top-post Mario, it confuses me..
<http://www.physci.org/codes/javafaq.jsp#netiquette>
(Top-Posting corrected, see comments below)
> "Andrew Thompson" <email***@***.com> wrote in message
>> On Mon, 19 Jul 2004 18:28:35 +0200, _Mario_ wrote:
>>
>>> Hi all, I need to read an image located in
>>> http://www.xxx.yyy/eee/test.jpg
>>> How can I display once readed in a swing interface?
>>
>> <sscce>
..
>> </sscce>
..
> I got this error on my new Pc (win XP)...:
>
> java.lang.NoSuchMethodError: getAccessibleTableFromContext............
Are there some other bits you do not show?
<http://www.physci.org/codes/javafaq.jsp#exact>
> What could be?
It *could* be that your Java is 1.1.
What does this report for java.version?
<http://www.physci.org/pc/property.jsp?prop=java.version>
If it says 1.1.4, click the first 'JTest' link
and check the same thing in the program that
comes up.
> How can I fix it? It seems that java cannot access my HD.... or web...
We will not solve this by guessing Mario, you
need to figure exactly what that Exception means.
--
Andrew Thompson
http://www.PhySci.org/ Open-source software suite
http://www.PhySci.org/codes/ Web & IT Help
http://www.1point1C.org/ Science & Technology
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Index ‹ java-programmer |
- Next
- 1
- Carbon AS CE IOC-JMX Architecture V 0.2 is releasedCarbon AS Community Edition is a JMX compliant Open Source J2EE
Application Server project initiated by Aquosine (http://
www.aquosine.com). Carbon AS Community Edition is released under LGPL
and is free to use, modify and distribute. Aquosine is an open
standards based enterprise solutions provider.
Please visit the thread: http://www.theserverside.com/discussions/
thread.tss?thread_id=44178
-Abhilash
- 2
- "Linked List" AssistanceCan someone please point me to a url that will show me how to create a
linked list.
This needs to be a very simple example as Linked Lists are confusing me.
Thankyou for your assistance.
- 3
- serialVersionUID.. ?Hello ,
I posted this message in the Eclpse group with no responses. I am using
Eclipse.
I resolved by defining this in my class:
static final long serialVersionUID = 0;
Now, all of a sudden, this is not working and getting error:
Syntax error on token "DETAIL_FOOTER", VariableDeclaratorId expected after
this token
Happens when I define this class var in applet or interface:
private DETAIL_FOOTER = "# detail footer";
I do not have a clue! Any one have any Ideas?
--
Thanks in Advance...
IchBin
_____________________________________________
'Black holes are where God divided by zero.'
-Steven Wright, comedian (1955- )
- 4
- ANN: New XML Differencing, Updated XML Mapping in Stylus Studio 5.3
A new update for the Stylus Studio XML IDE adds a new XML Differencing
Tool, updated visual XML mapping tools and many other features. Download
a free trial of Stylus Studio 5.3 at:
http://www.stylusstudio.com/xml_download.html
Highlights of new XML Differencing Tool:
* Differencing of XML files and folders using a customizable color-coded
XML tree view
* Support for one-to-one and many-to-one XML file
* Step through XML differences node-by-node
* View differences using "split-screen" and "merged changes" views
* Expand all changes, or collapse identical XML blocks to simplify the
display
* User-configurable XML differencing settings allow you to optionally
resolve or ignore
* XML entity references and XML namespaces
More information at: http://www.stylusstudio.com/xml_differencing.html
Updates to Stylus Studio XML Mapping Tools:
Stylus Studio's visual XML mapping tools now support new split-screen
editing mode that simultaneously display fully editable views of both
the visual XML mapping diagram and the underlying XSLT or XQuery source
code which implements the visual XML mapping. You can now edit either
the source code or the visual XML mapping diagram, and see instantly the
effect their changes have - all without clicking a separate tab or
opening another editor. The automatic synchronization of both the visual
mapping diagram and the XSLT or XQuery source code views is the most
productive mode for developing XML mappings and is a great way to learn
the intricacies of XSLT and XQuery. More information at:
http://www.stylusstudio.com/xml_to_xml_mapper.html
Sincerely,
The Stylus Studio Team
http://www.stylusstudio.com
- 5
- the MI 5 spammeremail***@***.com wrote:
> Incorrect. None of the nasty things that you have said or implied
> about me are at all true.
Does this mean you still accuse me of hacking OpenOffice.org's mailing
lists? What a hoot!
- 6
- commons transactionHi!
I would appretiate it if someone could direct me to a source where i
could get a feel of how exactly the FileResourceManager, in the
commons.transaction.file package is used to manage transactional files.
A source with an example or usage is cool too.
Thanks,
-D
- 7
- Please can you help me how can apply unicode in javaI am tr y to develope a localization application.when i run the code
there is no the right output, it's square box but i can't fix the error
and why it's like that .but i know the unicode representation of my
language please look a sample of code and based on that give me
suggestion to fix the erro.
import java.io.*;
class Unicodechar{
public static void main(String[] args){
//declare a character initialized to Ethiopic
char fidel='\u1200';
// print Ethiopic Unicode (version 3.0)
while(fidel<='\u137C'){
for(int i=0;i<8;i++){
System.out.println((int)fidel +", ");
fidel++;
}
//System.out.println();
}
}
}
- 8
- Capture conversion and containmentHi,
I'm writing a tool that analyses java-code, but I have a problem fully
understanding the rules defined in JLS3 for containment and their
combination with capture conversion.
Take the following classes:
class Box<T> {}
class ABox<T extends A> {}
class A {}
Why (because of which rules) is this type-correct code? :
ABox<? extends A> a1;
ABox<?> a2;
a1 = a2;
(And I really mean "a1 = a2" there, not "a2 = a1")
The extra bounds "? extends A" doesn't really make a difference,
ABox<? extends A> and ABox<?> are equivalent, because that parameter already
has a bound A from the definition of ABox. So, informally I understand why
this code is safe. But my problem is understanding the formal rules by
which we can derive that, and where those rules are defined.
My attempt at understanding this:
The constraint for the assignment is:
capture-of(ABox<?>) <: capture-of(ABox<? extends A>)
the capture of ABox<? extends A> is ABox<_T>
where _T is a fresh type variable with upperbounds A.
the capture of ABox<?> is ABox<_T2>
where _T2 is another fresh type variable, also with upperbounds A.
And ABox<_T2> <: ABox<_T> because _T2 <= _T (_T contains _T2). But why?
I see rules for containment defined (4.5.1.1) for wildcards, but not for
type variables created by capture conversion. While I would actually expect
that only rules for type variables would be needed, as types are always
capture converted before you use them. (And this example is chosen so
that "skipping" this capture conversion step doesn't work.)
Now, intuitively, I would say that one type variable contains another if all
its upperbounds are a supertype of one of the upperbounds of the other, and
all its lowerbounds are a subtype of one of the lowerbounds of the other.
But I'd like to see something like this in writing somewhere, and I can't
find an answer to this in the Java Language Specification or anywhere else.
And this intuitive rule doesn't work for Box<ABox<?>>, because the capture
conversion of that is just Box<ABox<?>> again.
So I'm quite confused about how this actually works.
I'd appreciate some help, or pointers to more information about this.
Wouter.
- 9
- How to make sure stdout and stderr is caught from runtimeexecHi,
I have written a class that handles stdout and std err from a unix
command. How can I make sure that both threads have finished? Do I need
to synchronzie my StreamConverter?
cheers,
//mikael
> public class RuntimeExec {
>
> public RuntimeExec() {
> }
>
> /**
> * Executes a command
> * @param command
> * @return The result of the command
> * @throws IOException
> */
> public String exec(String command) throws IOException {
> int exitValue = 0;//0 - executed ok.
> String stdOut = null;
> String stdErr = null;
> String result = null;//result from clearcase operation
> StringBuffer out = new StringBuffer();
> StringBuffer err = new StringBuffer();
> Process process = Runtime.getRuntime().exec(command);
> StreamConverter outSc = new StreamConverter(process.getInputStream(),out);
> StreamConverter errSc = new StreamConverter(process.getErrorStream(),err);
> Thread outThread = new Thread(outSc);
> Thread errThread = new Thread(errSc);
> outThread.start();
> errThread.start();
> //Wait until the prosess finish
>
> long delayMillis = 5000; // 5 seconds
> try {
> //wait for threads to die.
> outThread.join(delayMillis);
> if (outThread.isAlive()) {
> // Timeout occurred; thread has not finished
> } else {
> // Finished
> }
> } catch (InterruptedException e) {
> // Thread was interrupted
> }
>
>
>
>
> return result;
>
>
> }
>
> // bridge between byte and character stream.
> class StreamConverter implements Runnable {
> private InputStreamReader isr = null;
> private StringBuffer sb = null;
> // end of steam
> private static final int EOS = -1;
>
> public StreamConverter(InputStream is, StringBuffer sb) {
> isr = new InputStreamReader(is);
> this.sb = sb;
> }
>
> public void run() {
> int character = 0;
> try{
> while ((character = isr.read()) != EOS) {
> sb.append((char)character);
> }
> }catch(IOException ioe){
> System.out.println("Could not read std out!"+ioe.getMessage());
> }
> }
>
> }
>
>
> }
- 10
- Username String suggestionI'm doing Java excercises in University. Part of a program I am working on
requires me to input a both a surname and forename together and have the
program output the forename name only.
e.g:
Please enter student's name: Yuriy Ivanov
Yuriy scored (+ score) which is a (+ grade)
The only way I can think of doing this is to use a String method to output
everything until it hits a space, does this sound probable?
Of course, I would need validation incase only a space is entered.
If this sounds like I'm on the right lines please can someone tell me how
to do that, if not please can someone tell me a better way. I've only know
of String concatination which is the opposite of what I need.
If there is a way to do this without methods I'd prefer to have that as
this part of the program isn't meant to include methods or arrays yet.
Thank you in advance.
- 11
- Spring tutorialHi!
Does anyone knows for a good and free SPRING tutorial?
Please send me some links.
I tryed to google it, but all I find is very poor tutorials.
Thanks!
Marko
--
Remove MakniMe from e-mail address
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SAILING IS A POETRY OF MOTION
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- 12
- Problem running the hello world servletI installed j2sdk1.4.2_12, and apache tomcat 4.1.34, on a windows XP
box. I set the following environment variables:
CATALINA_HOME C:\apache-tomcat-4.1.34
CLASSPATH C:/Program
Files/Java/jre1.5.0/lib/xt/QTJava.zip;C:/j2sdkee1.3.1/lib
J2EE_HOME C:/j2sdkee1.3.1
JAVA_HOME C:/j2sdk1.4.2_12
PATH C:\j2sdk1.4.2_12\bin\
I edited the web.xml in C:\apache-tomcat-4.1.34\conf and uncommented
the invoker servlet tag so that I can run servlets.
I can now access jsp and html pages with tomcat, but when I tried to
run HelloWorld Servlet, it gives the following error:
ava.util.MissingResourceException: Can't find bundle for base name
LocalStrings, locale en_US
at
java.util.ResourceBundle.throwMissingResourceException(ResourceBundle.java:838)
at java.util.ResourceBundle.getBundleImpl(ResourceBundle.java:807)
at java.util.ResourceBundle.getBundle(ResourceBundle.java:578)
at HelloWorldExample.doGet(HelloWorldExample.java:38)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:696)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:809)
at
org.apache.catalina.servlets.InvokerServlet.serveRequest(InvokerServlet.java:417)
at
org.apache.catalina.servlets.InvokerServlet.doGet(InvokerServlet.java:131)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:696)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:809)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:198)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:144)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:209)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:595)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:432)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:954)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:138)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:595)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:432)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:954)
at
org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2459)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:132)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:595)
at
org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:118)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:593)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:116)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:593)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:432)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:954)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:126)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:595)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:432)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:954)
at
org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:152)
at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
at
org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
at
org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
at
org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
at
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
at java.lang.Thread.run(Thread.java:534)
What could be the problem?
- 13
- Java Timer, swingDear Java experts,
I'm struggling with timers. I've used javax.swing.Timer in my program. But
when one doesn't have the jre installed, my program doesn't work. It then
gives a class not found exception in the browser. It only works on the sun
virtual machines which you have to download from the website like some jre.
I quess the swing library isn't supported by a lot of virtual machines. But
I'm happy about how the timer works in my program because it makes use of
the actionListener.
Is there some easy solution? Using a simple Timer like the swing version and
let it work on any virtual machine/ jre?
best regards,
Piet den Dulk (Netherlands)
- 14
- Creating an object during runtimeI'm trying to generate an object name during run time, and then create an
object with the contents of that variable. You can see that I'm trying to
also make the object name self generating (almost, the 'y' variable isnt
being incremented yet), putting two values ('y' and 'C'). My apologies for
poor coding structure / lack of comments, but I'm am a bit lost on how to
work it out. MANY thanks in advance.Heres what I have so far:
public class testVariable
{
private String name = "";
private String New_name = "";
private int y = 2;
public testVariable()
{}
public void test(String x)
{
name = x;
New_name = name + y ;
System.out.println(New_name);
}
public String getNew_name()
{
return New_name;
}
public static void main(String[] args)
{
int z = 2;
testVariable Darren = new testVariable();
Darren.test("C");
testVariable "c"+ z = new testVariable();
String Old_name = New_name;
}
}
- 15
- url rewriting when the url contains parametersHi,
I am trying to maintain sessions by doing URL rewrite. Things were
working fine till the URL did not contain any parameters. The URL that
I have now is of the form:
http://myurl?id=1&user=null and on doing a sessionID append it becomes
http://myurl?id=1&user=null;jsessionId=xyzw..
Things still get authenticated but now when I try and get the value of
user I get passed the whole string after user= and not just null.
What is the right way to append the sessionID? Btw, I am using the URL
to connect to a servlet from a j2me client.
Thanks,
Gaurav
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