Problem with Class.getResource()

I am trying to load a jar file dynamicaly like,
ClassLoader prevClassLoader = Thread.currentThread().getContextClassLoader();
URLClassLoader m_ClassLoader = new URLClassLoader(new URL[] {new URL(sV1JarPath)}, prevClassLoader);
But after doing this if I try to load a resource from the "prevClassLoader " like,
MyClass.class.getResource("path"); where MyClass is loaded by prevClassLoader, it is not working. It fails to load the resource.
Can anyone help me correct this issue?
Thanks
Unni

try "/path".I am giving it like
MyClass.class.getResource("images/" + name); where there is an images packages in side the package where MyClass resides.
But here the problem is as MyClass is in the prevClassLoader and it is not able to find it when we call Class.getResource()

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Different result with class.getResource/ getClassLoader ...

There is something about resource loading I don't understand. According to the api the method getResource() calls the ClassLoader for loading the given resource. But the following example shows a difference:
package testPackage;
public class Test
    public static void main(String[] args)
        Test t = new Test();
        System.out.println(Test.class.getResource("testPackage/test.class"));
System.out.println(Test.class.getClassLoader().getResource("testPackage/test.class"));
        System.out.println(t.getClass().getResource("testPackage/test.class"));
System.out.println(t.getClass().getClassLoader().getResource("testPackage/test.class"));
}The resulting output is:
null
file:/C:/.../bin/testPackage/test.class
null
file:/C:/.../bin/testPackage/test.classHow can this difference be explained?

There is something about resource loading I don't
understand. According to the api the method
getResource() calls the ClassLoader for loading the
given resource. As noted, the API also explains the algorithm used to get an absolute resource name from the initial resource name, before delegating to the classloader.
Basically, a package name prefix is added if the name is not absolute (i.e doesn't start with a leading slash).

Problem with Class and Classpath

Hello ME Windows Users, now before you place a wry smile on your face, I have a problem with path and classpath. Stop it, I can see you smiling!
By visiting the the last 10 pages of the forum and reading Sun installation notes, some tooldocs and by given some answers by some nice people, I have become an expert in turning off my computer, about 10 times/hr. I still am trying to make my first cup of java.
With the ME computer,
I'm unable to right click on the desktop and go to properties, advanced,
I'm unable to go go start, run, sysedit,
I'm unable to change the ms-dos window of autoexec.bat, it just shuts down.
Now before you tell me, I should of bought a different computer, the only place I can find to modify the path and classpath is in the environment which is in system configuration under tools. Here I have placed numerous configurations, like
C:\java>set path=%path%;c:\j2sdk1.4.2\bin
C:\java>set classpath=%classpath%;.;
;java_dir\bin where ;java_bin is c:\j2sdk1.4.2
.; java_dir\bin; %path% where ;java_bin is c:\j2sdk1.4.2 and the list goes on.
But, I know you are still smiling, the % signs comes up in a dialog box, saying too many, and will not convert the text to the environment to be saved when I close down for the tenth time in the last hour.
Can someone help me before I make a real cup of coffee and accidentally drop it on the ME box.
Have a laugh on me Mik.

C:\java>set path=%path%;c:\j2sdk1.4.2\binGood
But it is no good because it has to many % and a dialog box appears, saying you have too many parameters.
Are you saying I have to shutdown again to answer your ?
From the HELP menu-
To confirm startup commands line by line
Click Start, and then click Shut down.
Click Restart, click OK, and then press and hold the CTRL key until the Windows Startup Menu appears.
Enter the number for Step-by-step confirmation, and then press ENTER.
For each command you want to run, press Y.
If the command runs successfully, you are prompted with the next command.
If the command does not run successfully, you receive an error message.
To skip a command, press N.
Mik

[APPLET][Heritage] Problem with classes

Hi, I'm developping a simple JAVA Applet and I have a problem
I have a class called LUIweb which is the main class. Here is a part of it.
public class LUIweb extends JApplet implements Runnable {
public void run() {
DisplayMessage("JAVA rocks");
public void DisplayMessage(String message){
jtextArea.append(message);
middlePanel.removeAll();
middlePanel.add(textScrollPane, BorderLayout.CENTER);
middlePanel.validate();
middlePanel.repaint();
It displays the message "JAVA rocks" in my JTextArea. But when another class from the same package calls DisplayMessage, nothing is displayed in my JTextArea
public class Data_net extends LUIweb{
public void Test(){
DisplayMessage("NON");
Have you got any idea to fix that?
Thank you for you help

OK,
You are using a separate thread to update the gui. As swing is not multithread safe, this is not good. Anytime you want to change the gui, you must do it on the gui thread. This means without extra help, you should only change the gui from within a Listener, such as a MouseListener, KeyListener, etc, etc.
In your case, you are updating the not from the gui thread (not from a Listener), and so you must ask the gui thread to do the work for you when it has time.
This means you need to use SwingUtilities.invokeLater or SwingUtilities.invokeAndWait.
Since the sequencing is important to you in your code, you should probably use invokeAndWait, such as
public void run()
          SwingUtilities.invokeAndWait( new Runnable()
                 public void run() { DisplayMessage(Language.CONNECT_DB); }
          Data_net Donnee_net=new Data_net();
          SwingUtilities.invokeAndWait( new Runnable()
                 public void run() { DisplayMessage("Connecting to "+Donnee_net.GetHost()+
                                                   " with user "+Donnee_net.GetUser()+"...\n");
          Donnee_net.Test();

Problems with classes referencing each other...

I've got a problem....i have a program with two classes, and each class needs access to methods stored in the other class.
I've tried to create a reference (Classname name=new Classname();), but upon execution, i get a Exception in thread "main" java.lang.StackOverflowError, and a long list of locations, all pointing to the references i created at the top of each class.
What's wrong, and how do I fix this?

You have infinite recursion. A method or constructor is calling itself, or is calling another method or constructor that eventually ends up calling the first one.
If you can't find it, post code. Use [code] and [/code] tags, which you can get with the code button, to make the code readable.

A stange problem with class Random

I am doing with a simple test of class random as follow:
public class Test{
private static rand=new Random();
public static void main(String args[]){
      int i=rand.nextInt(10);
      System.out.println(i);
}When I compile the program using javac,error occurs.It says
Wrong number of arguments in method
private int i=rand.nextInt(10)
^
If I remove the arg "10" ,it works fine.So I have to rewrite it as below:
private int i=rand.nextInt(10) % 10;I am puzzled now.Why can't I use the int nextInt(int n) method of class Random?

Thanks for your advice.
I have tried as what you have said ,and the codes seem like these:
import java.util.*;
public class test {
     private static Random rand = new Random();
     public static void main(String args[]){
          int i=rand.nextInt(10);
          System.out.println(i);
}and the file name is test.java of course.
But it cause the same error.
And when I compile the same code on another machine ,it wors fine!
(all the two machines are installed with win2k server and j2sdk1.4.1_01).
Why there exists problems and difference?
Did I have to set something else of the system?

Problems with class CL_GUI_FRONTEND_SERVICES

Hi.
I already searched for a solution in the forum, but haven't found anything yet.
I use the method to check if a directory exists and the one to list the files. The user can specify the directory on the Appl.-Server via SELECTION-SCREEN. First the code:
CALL METHOD CL_GUI_FRONTEND_SERVICES=>DIRECTORY_EXIST
EXPORTING
    DIRECTORY            = l_unixpath
RECEIVING
    RESULT               = l_count_unixdir
EXCEPTIONS
    CNTL_ERROR           = 1
    ERROR_NO_GUI         = 2
    WRONG_PARAMETER      = 3
    NOT_SUPPORTED_BY_GUI = 4
    others               = 5.
CALL METHOD CL_GUI_FRONTEND_SERVICES=>DIRECTORY_LIST_FILES
EXPORTING
    DIRECTORY            = l_unixpath
CHANGING
    file_table           = l_itab_unixdir
    count                = helpvar
EXCEPTIONS
    CNTL_ERROR           = 1
    ERROR_NO_GUI         = 2
    WRONG_PARAMETER      = 3
    NOT_SUPPORTED_BY_GUI = 4
    others               = 5.
IF l_count_unixdir = 'X'.
WRITE: / 'Directory Exists'.
READ TABLE l_itab_unixdir INDEX 1 INTO l_unixdir.
WRITE:/ helpvar.
WRITE:/ l_unixdir.
WRITE
ELSE.
WRITE:/ 'Directory not found'.
ENDIF.
Now my problem:
l_unixpath is '/', the result is: Directory exists, but helpvar is 0, l_itab_unixdir is empty;
l_unixpath is '/usr/sap/', the result is: Directory not found <b>(but the directory exists!)</b>;
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Why it's working with the Windows-Path but not with Unix? Thanks for your answers.

Becose that class is for presentation server. You can't use it with application server.
Try FM F4_DXFILENAME_TOPRECURSION, may be helps.
Regards.

Problems with class MdmDimension

Hello, I've created some dimensions and cubes using cwm2 packages, in Oracle 9i.
Now I'm trying to use these objects in a j2ee aplication using olap api. My problem is: when I try to display the properties (display_name, plural_description, description, ...) of my dimensions (using MdmDimension class), the result is not the same of the same properties using ALL_OLAP2_DIMENSIONS view.
For example, the PR01 dimension has the next descriptions (using ALL_OLAP2_DIMENSIONS view):
plural_name: 'Prueba01 plural'
display_name: 'Prueba01 display'
short_description: "Prueba01 short'
description: 'Prueba01 description'.
And now, using the methods on MdmDimension class, I've got the next results:
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getShortDescription() --> 'Prueba01 display' ????
getShortPluralDescription() --> 'Prueba01 plural' OK
getDescription() --> 'Prueba 01 short' ????
I need to display the description ('Prueba01 valen'), but I haven't found the way.
What is failing ? My database version is 9.2.0.6, and I'm using MdmDimension from package oracle.express.mdm. Thanks a lot by your help.

Hi Edmund,
I'm having the same problem in the same upgrade scenario. Did you find a solution for this big issue?
Thanks.
Patricio.

Problems with Classes

Hi everyone.
I am using a scroller class from kirupa, however i am having
a small problem. Everything works fine if i place it all on the
main time line. however when i want to package all the mc's used
for the scroller into a mc of it own the scroller will not update
for the new content. I am losing some hair trying to tackle this
one on my own and would love it if someone could help.
Here are the files:
EDITED: i have just added both the version of the scroller in
a container...and one that is not. The one that is not work
perfectly, the one that is in the container has the flaw that when
the new content is loaded in the scroll bar does not hide or change
height, it keeps the property of the initial mc loaded.
Hope that makes sense.
Zipped
Files
Thanks for all for taking time for this.
Very much appreciated,
Martha Stewart

Think it works (almost) properly now. This is the code for
the buttons (change the mc to attach...)
on(release){
Scroller.contentMain.unloadMovie;
Scroller.contentMain.attachMovie("historytxt","newcontent",1)
// Line of importance
setTimeout(Scroller.myscrollbar, "setScrollProps", 50);
Scroller.myscrollbar.backToTop();
Make one correction in the class:
public function backToTop():Void
dragger._y = top;
content._y = 0; // instead of 'top'
updateContentPos();
Now that last correction disables the easing effect when
clicking on a new topic, but there's something wrong in the class
and the 'new' values are not correct. I'll try to figure it
out.

Event Dispatch Problem With Classes

I have a custom Timer class that pops up an inactivity alert
after 3 minutes. The user can then choose 'yes' if they are still
editing a record or 'no' if they are done. If they do not respond
within 2 minutes of the alert it assumes 'no'.
A 'yes' refreshes the timer and closes the alert.
A 'no' kicks them out of the edit state in the component that
the timer is called from.
The logic of the timer is working fine but it doesn't seem to
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Code From LockTimer class:
public class LockTimer extends Sprite
private var threeMinuteTimer:Timer;
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// creates a new threeMinute Timer
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// designates listeners for the interval and completion
events
threeMinuteTimer.addEventListener(TimerEvent.TIMER, onTick);
threeMinuteTimer.addEventListener(TimerEvent.TIMER_COMPLETE,
onTimerComplete);
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twoMinuteTimer.addEventListener(TimerEvent.TIMER_COMPLETE,
onTimerCompleteB);
// starts the timer ticking
threeMinuteTimer.start();
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restart(threeMinuteTimer);
twoMinuteTimer.reset();
private function onTick(evt:TimerEvent):void{}
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dispatchEvent(new Event("timeUp",true));
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if (eventObj.detail==Alert.YES) {
refresh();
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private function initializeHandler(event:Event):void{
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//editDone();
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so here is what i had to do to make this work:
1. I had to attach the listener to theTimer rather than the
component
2. I had to initiate the LockTimer constructor outside of the
function
3. I had to call the handler initialization function from the
component MXML
below is the revised code (with excess cut out)
<?xml version="1.0" encoding="utf-8"?>
<mx:HDividedBox xmlns:mx="
http://www.adobe.com/2006/mxml"
width="780" height="515" liveDragging="true"
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<mx:Script>
<![CDATA[
import mx.controls.Text;
import mx.rpc.events.FaultEvent;
import mx.rpc.events.ResultEvent;
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public static const millisecondsPerHour:int = 1000 * 60 *
60;
public static const millisecondsPerDay:int = 1000 * 60 * 60
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//IMPORTANT!!!////////////////
private var theTimer:LockTimer=new LockTimer();
private function initializeHandler():void{
theTimer.addEventListener("timeUp",timeUpHandler);
private function timeUpHandler(event:Event):void{
editDone();
private function refreshLock(theLock:int):void{
var theTime:Date=new Date();
if(theLock==1){
theTimer.refresh();
theTime.setTime(theTime.getTime() +
(millisecondsPerMinute*5));
}else if(theLock==0){
theTime.setTime(theTime.getTime());
}else{
return;
form1.request.firmlockedTime=String(theTime.valueOf());
form1.request.firmisLocked=String(theLock);
private function editIt():void{
//see if it's being edited
if(checkLock()){
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Alert.show('This record is currently being edited by another
user. Please try again later.', 'Record Locked',
mx.controls.Alert.OK);
}else{
theTimer.startMe();
refreshLock(1);
form1.send();
currentState="AdminEdit";
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refreshLock(0);
form1.send();
currentState="Admin";
]]>
</mx:Script>
</mx:HDividedBox>

Problem with classes generated with .classgen

When I run the sample app from the "Using XML in Oracle Database Applications, Part 2" that generates classes, the syntax is:
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public MYMAIN getDocument()
return (MYMAIN)super.getCGDocument();
I would have expected that classgen would have made a class called MYMAIN, but it did not. I'm very confused. Please help.
Thanks,
-Peter
null

Check if you have MYMAIN in your
DTD file:
<!ELEMENT MYMAIN ......

Problem with class font

I have been execute a tool, but she didn�t work properly.
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Hello dmytro,
see the heading (translated from my German ID) >>> input method options, check this box and use the integrated input for non-Latin text. This ensures that languages such as Cyrillic, etc that are not based on the Latin alphabet, can be used in InDesign anyway. And note: The operating system of your computer must support this language systems. Otherwise it does not work.
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Problem with Class Diagram

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class A
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UML:
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try to add jar containing driver to
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Can I set a different Priority in my
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You have to do this in the Log4j configuration file (log4j.properties). Add a line like:
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Problem with Class.getResource()

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