Error:"exception in thread main:java.lang.noclassdeffound error.

Hi,
I am new to this java tech and programming. I just started learning and installed j2sdk1.4.0_03. I wrote a small hello world program and compiled it without any errors. When I execute the same using java hello command, I am getting an error like this: exception in thread "main" java.lang.noclassdeffound error. I am not able to resolve this issue. Please let me know the sol.
thanks
venkatraman

send the program u have typedUmm... Why?
Anyway @NovaKane: Welcome. Together with seifist and sunny we have at
least three new posters who show enough intelligence to find chuck's
solution (or one of the many hundreds of others like it) and the politeness
to thank him for it. What's the forum coming to?
If you need it there is a description of the classpath here:
http://java.sun.com/j2se/1.5.0/docs/tooldocs/windows/classpath.html
Again, welcome. And thanks for raising the intelligence level (and politeness
quotient) of the fora.

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NoClassDefFoundError happens because the JVM cannot find some class from your program, not because the OS cannot find your JVM (PATH regulates the latter, but not the former). JVM looks up classes in directories (or JAR files) specified through the -classpath option, like "java -classpath c:\myclasses MyMainClass". Read the online doc for the "java" launcher for more info.

"Exception in thread "main" java.lang.NoClassDefFound: classname" error.

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public class Hello
public static void main( String[] args )
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hi!
set the classpath to the relative path "."!
in the command box type this:
SET CLASSPATH=.;
then it should work!
visit: >> http://www.menzsoft.ch <<
greets

The following Error: Exception in thread "main" java.lang.NoClassDefFoundE

Dear People,
I would really kindly welocme any help on the following error problem:
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Sorry about that last email - this is the errors I get now after I have placed that '.' to my classpath!
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at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:286)
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at CoreUpdate.main(CoreUpdate.java:24)
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hi.
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at java.awt.Toolkit$2.run(Toolkit.java:821)
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hi Srini,
thanks for your time.
I am trying to install it on RHEL 5 on VMWare Player, and the db version is 11g.
i think the problem is with the below error
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at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:164)
at java.awt.Toolkit$2.run(Toolkit.java:821)
at java.security.AccessController.doPrivileged(Native Method)
at java.awt.Toolkit.getDefaultToolkit(Toolkit.java:804)
at com.jgoodies.looks.LookUtils.isLowResolution(Unknown Source)
at com.jgoodies.looks.LookUtils.<clinit>(Unknown Source)
at com.jgoodies.looks.plastic.PlasticLookAndFeel.<clinit>(PlasticLookAndFeel.java:122)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:242)
at javax.swing.SwingUtilities.loadSystemClass(SwingUtilities.java:1783)
at javax.swing.UIManager.setLookAndFeel(UIManager.java:480)
at oracle.install.commons.util.Application.startup(Application.java:758)
at oracle.install.commons.flow.FlowApplication.startup(FlowApplication.java:164)
at oracle.install.commons.flow.FlowApplication.startup(FlowApplication.java:181)
at oracle.install.commons.base.driver.common.Installer.startup(Installer.java:265)
at oracle.install.ivw.db.driver.DBInstaller.startup(DBInstaller.java:114)
at oracle.install.ivw.db.driver.DBInstaller.main(DBInstaller.java:132)

Exception in thread "main" java.lang.NoClassDefFound

C:\myjava>java JdbcCheckup
Exception in thread "main" java.lang.NoClassDefFoundError: JdbcCheckup
C:\myjava>java -cp %CLASSPATH%; . JdbcCheckup
Exception in thread "main" java.lang.NoClassDefFoundError: c:\tomcat_4\common\li
b\servlet/jar;
C:\myjava>
here is my classpath. There is 'c:\tomcat_4\common\lib\servlet/jar;' its listed as a .jar file?
why cant i compile?
CLASSPATH=c:\oracle\ora81\jdbc\lib\classes12.zip; c:\tomcat_4\common\lib\serv
t.jar; c:\eclipse; c:\tomcat_4\examples\WEB-INF\classes;c:\oracle\ora81\jlib\b
raphbean.jar;c:\oracle\ora81\jlib\LW_PfjBean.jar;c:\oracle\ora81\jlib\bigraphb
n-nls.zip

Either remove the erroneous spaces between your classpath elements, or do:
java -cp "%CPASSPATH";." JdbcCheckup
(notice the double-quotes)
The way you did it, as soon as it saw the first space (after your classes12.zip entry), it thought that was the end of the classpath.

How to solve this problem"exception in thread "main" java.lang.noclassdeff"

I am a tyro of java programming .
i downloaded the j2sdk-1_4_2_09-windows-i586-p.exe from www.java.sun.com and installed it at the defaulted path C:\j2sdk1.4.2_09,
then i wrote down my first java program as follow:
public class hello
public static void main (String args[])
System.out.println("hello,��!");
}and stored it at C:\Javasmp\ch01\hello.java.
after that i opened dos commind window and compiled it :
c:\javac C:\Javasmp\ch01\hello.java. and obtained file hello.class (C:\Javasmp\ch01\hello.class)
but when running it (c:\java C:\Javasmp\ch01\hello) there was a mistake:
exception in thread "main"java.lang.noclassdeffounderror:C:\Javasmp\ch01\hello
i searched on the internet and found out the solution is set enviroment viriable ,so i set the "CLASSPATH" as".;C:\j2sdk1.4.2_09\lib;C:\j2sdk1.4.2_09\lib\tools.jar" ,"PATH" as"C:\j2sdk1.4.2_09\bin;C:\Windows\system32;c:\windows\system32\Wbem" and "JAVA_HOME" as "C:\j2sdk1.4.2_09\bin;C:\j2sdk1.4.2_09\jre\bin"
afer that, i opened a new dos command window and run it again ,but the problem was still unsolved.
in addition,my os is "windows xp"
anyone can help me ,thank you!
i am a student in China,it's a hard time for me to write down my question in english ,i doubt whether i express my question clearly.
thank you for you reading.

I have created a simple applet.
import java.lang.*;
import java.awt.*;
public class jawtex3 extends java.applet.Applet
public void init()
add(new Button("One"));
add(new Button("Two"));
public Dimension preferredSize()
return new Dimension(200, 100);
public static void main(String [] args)
Frame f = new Frame(" jawtex3");
jawtex3 ex = new jawtex3();
ex.init();
f.add("Center", ex);
f.pack();
f.show();
In this no compilation errors.
I am getting runtime exception.as Exception in thread "main"java.lang.NoClassDefFound Error: jawtex
reply me soon.
thankyou.

HELP Needed with this error: Exception in thread "main" java.lang.NoClass

Folks,
I am having a problem connecting to my MSDE SQL 2000 DB on a WindowsXP pro. environment. I am learning Java and writing a small test prgm to connect the the database. The code compiles ok, but when I try to execute it i keep getting this error:
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I am using the Microsoft jdbc driver and my CLASSPATH is setup correctly, I've also noticed that several people have complained about this error, but have not seen any solutions....can someone help ?
Here is the one of the test programs that I am using:
import java.sql.*;
* Microsoft SQL Server JDBC test program
public class Test1 {
public Test1() throws Exception {
// Get connection
DriverManager.registerDriver(new
com.microsoft.jdbc.sqlserver.SQLServerDriver());
Connection connection = DriverManager.getConnection(
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if (connection != null) {
System.out.println();
System.out.println("Successfully connected");
System.out.println();
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System.out.println("\nDriver Information");
System.out.println("Driver Name: "
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System.out.println("Driver Version: "
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System.out.println("\nDatabase Information ");
System.out.println("Database Name: "
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System.out.println("Database Version: "+
meta.getDatabaseProductVersion());
} // Test
public static void main (String args[]) throws Exception {
Test1 test = new Test1();

I want to say that there was nothing wrong
with my classpath config., I am still not sure why
that didn't work, there is what I did to resolved
this issue.You can say that all you like but if you are getting NoClassDefFound errors, that's because the class associated with the error is not in your classpath.
(For future reference: you will find it easier to solve problems if you assume that the problem is your fault, instead of trying to blame something else. It almost always is your fault -- at least that's been my experience.)
1. I had to set my DB connection protocol to TCP/IP
(this was not the default), this was done by running
the
file "svrnetcn.exe" and then in the SQL Server Network
Utility window, enable TCP/IP and set the port to
1433.Irrelevant to the classpath problem.
2. I then copied all three of the Microsoft JDBC
driver files to the ..\jre\lib\ext dir of my jdk
installed dir.The classpath always includes all jar files in this directory. That's why doing that fixed your problem. My bet is that you didn't have the jar file containing the driver in your classpath before, you just had the directory containing that jar file.
3. Updated my OS path to located these files
and....BINGO! (that simple)Unnecessary for solving classpath problems.
4. Took a crash course on JDBC & basic Java and now I
have created my database, all tables, scripts,
stored procedures and can read/write and do all kinds
of neat stuff.All's well that ends well. After a few months you'll wonder what all the fuss was about.

On starting WebLogic getting Error : Listening for transport dt_socket at address: 8453 Exception in thread "main" java.lang.NoClassDefFoundError: vXmx512m

Hi,
system i am using for Oracle SOA is :
Windows 64 Bit
i5 Processor
6 GB RAM
29 GB on C Drive is already free after installation of all SOA related products.
I have installed wlserver_10.3 for SOA 11g Development purpose and followed exact installation sequence and procedure as mention in oracle documentation
i created domain also and every thing look correct but after installation procedure there are "Additional actions required just after every thing installed" :
setting memory limit
starting weblogic server (Admin Server)
starting weblogic managed server
and so on
now Problem is when i execute C:\Oracle\Middleware\user_projects\domains\soa_div_domain\bin startWebLogic.cmd
as mention in oracle documentation i am getting following error message : (i have only included last error lines instead of complete console log)
oConsole= -Dweblogic.ext.dirs=C:\Oracle\MIDDLE~1\patch_wls1036\profiles\default\
sysext_manifest_classpath;C:\Oracle\MIDDLE~1\patch_oepe180\profiles\default\syse
xt_manifest_classpath;C:\Oracle\MIDDLE~1\patch_ocp371\profiles\default\sysext_ma
nifest_classpath;C:\Oracle\MIDDLE~1\patch_adfr1111\profiles\default\sysext_manif
est_classpath weblogic.Server
Listening for transport dt_socket at address: 8453
Exception in thread "main" java.lang.NoClassDefFoundError: vXmx512m
Caused by: java.lang.ClassNotFoundException: vXmx512m
        at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
Could not find the main class: ++Xmx512m. Program will exit.
Now to resolve this what i already tried are :
I change JAVA_HOME and PATH to jdk6 which came with web logic installer
Location is at :
JAVA_HOME : C:\Oracle\Middleware\jdk160_29
PATH : C:\Oracle\Middleware\jdk160_29\bin
The above dose not include any space between path
I ran the startWebLogic.cmd and got same error
After that I also added
CLASSPATH : C:\Oracle\Middleware\jdk160_29\lib\tool.jar;C:\Oracle\Middleware\wlserver_10.3\server\lib\weblogic.jar;C:\Oracle\Middleware\jdk160_29\bin
WL_HOME: C:\Oracle\Middleware\wlserver_10.3
I ran the startWebLogic.cmd and got same error
I also used earlier path which I used with eclipse when I was working on other java development.
JAVA_HOME : C:\Program Files\Java\jdk1.7.0_21
PATH : C:\Program Files\Java\jdk1.7.0_21\bin
I ran the startWebLogic.cmd and got same error
Then I also gave PATH: C:\Oracle\Middleware\wlserver_10.3\server\lib      (including the existing one using ; )
I ran the startWebLogic.cmd and got same error
Now may be there is a file called setSOADomainEnv.cmd in
< C:\Oracle\Middleware\user_projects\domains\soa_div_domain\bin\ setSOADomainEnv.cmd>
That include some values for memory set :
set JAVA_OPTIONS=%JAVA_OPTIONS%
set DEFAULT_MEM_ARGS=-Xms512m –Xmx512m
set PORT_MEM_ARGS=-Xms512m –Xmx768m
if "%JAVA_VENDOR%" == "Oracle" goto OracleJVM
set DEFAULT_MEM_ARGS=%DEFAULT_MEM_ARGS% -XX:PermSize=128m -XX:MaxPermSize=768m
set PORT_MEM_ARGS=%PORT_MEM_ARGS% -XX:PermSize=256m -XX:MaxPermSize=768m
now as I change the red highlighted value to 512 value because I have less memory resource and I checked in installation documentation to change the above red highlighted value to 512 original is 1024 which is too high and it was crating problem and showing memory space problem so I change it to 512 and now I am not getting that memory space problem error but may be the above error is related with change value in setSOADomainEnv.cmd file or not
Following are my domain, weblogic and soa home directory path and all these path are exactly what it suppose to be according to Oracle Installation Documentation:
WebLogic :
C:\Oracle\Middleware\wlserver_10.3
C:\Oracle\Middleware\coherence_3.7
C:\Oracle\Middleware\oepe_11.1.1.8.0
SOA Oracle Home Directory :
C:\Oracle\Middleware\Oracle_SOA1
OSB Home Location :
C:\Oracle\Middleware\Oracle_OSB1
Domain name : soa_div_domain
Domain Location :       C:\Oracle\Middleware\user_projects\domains
Application Location : C:\Oracle\Middleware\user_projects\applications
Domain Location:        C:\Oracle\Middleware\user_projects\domains\soa_div_domain
form here i am trying to start weblogic : C:\Oracle\Middleware\user_projects\domains\soa_div_domain\bin\startWebLogic.cmd
Please tell me any body want more details.
Thanks.

I think you are missing a character '-'
USER_MEM_ARGS="Xms512m -Xmx512m -XX:MaxPermSize=128m"Add this character like follows
"-Xms512m -Xmx512m -XX:MaxPermSize=128m"

Exception in thread "main" java.lang.Error: Unable to find named traits: org.puremvc.as3.multicore.p

Hi all,
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at adobe.abc.GlobalOptimizer$InputAbc.readInstance(GlobalOptimizer.java:837)
at adobe.abc.GlobalOptimizer$InputAbc.readAbc(GlobalOptimizer.java:388)
at adobe.abc.GlobalOptimizer$InputAbc.readAbc(GlobalOptimizer.java:280)
at adobe.abc.LLVMEmitter.generateBitcode(LLVMEmitter.java:160)
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at com.adobe.air.ipa.IPAOutputStream.compileRootSwf(IPAOutputStream.java:196)
at com.adobe.air.ipa.IPAOutputStream.finalizeSig(IPAOutputStream.java:366)
at com.adobe.air.ADTPackager.createPackage(ADTPackager.java:65)
at com.adobe.air.ipa.IPAPackager.createPackage(IPAPackager.java:165)
at com.adobe.air.ADTEntrypoint.parseArgsAndGo(ADTEntrypoint.java:132)
at com.adobe.air.ipa.PFI.parseArgsAndGo(PFI.java:152)
at com.adobe.air.ADTEntrypoint.run(ADTEntrypoint.java:68)
at com.adobe.air.ipa.PFI.main(PFI.java:112)
do you have some ideas about this ?
Regards
Stef

Ok,
    <target name="releasecompile" depends="init">
    <echo>
              Ant Task :: releaseCompile
    </echo>
        <java jar="${MXMLC.JAR}" fork="true" failonerror="true">
           <arg value="-debug=false"/>
            <arg value="+flexlib=${SDK_HOME}frameworks"/>
            <arg value="+configname=air"/>
            <arg value="-file-specs=${MAIN_SOURCE_FILE}"/>
            <arg value="-output=${build}/${APP_ROOT_FILE}"/>
        <arg value="-external-library-path+=${APP_ROOT}/libs/PureMVC_AS3_MultiCore_1_0_5. swc" />
        </java>
    </target>
I mistake this line
<arg value="-external-library-path+=${APP_ROOT}/libs/PureMVC_AS3_MultiCore_1_0_5. swc" />
must be
<arg value="-library-path+=${APP_ROOT}/libs/PureMVC_AS3_MultiCore_1_0_5.swc" />
for include the content in the swf.
Regards
Stef

Exception in thread "main" java.lang.NullPointerException error JDeveloper 12c

Hello,
I am trying to call a java stored procedure in java application. I am using ORACLE database and JDeveloper.
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                    System.out.println(resul.getInt(1) + "\t" + resul.getString(2));
            } catch (ClassNotFoundException e) {
                e.printStackTrace();
            } finally {
                try {
                    conn.close();
                } catch (SQLException e) {
                    e.printStackTrace();
When I try to run the java file, I get this error "Exception in thread "main" java.lang.NullPointerException at client.Class1.main(Class1.java:29).
So the line I get error in is "conn.close();"
How to fix this?
Thank you very much in advance.

I am trying to call a java stored procedure in java application. I am using ORACLE database and JDeveloper.
I am getting error "Exception in thread "main" java.lang.NullPointerException. I have no idea what have I been doing wrong.
Maybe you haven't read it yet but I told you in your other thread what you were doing wrong and, step by step, how to address the problem.
https://forums.oracle.com/thread/2611124
I'm not going to repeat everything again just this one main piece of advice:
Until you get you code working outside the database don't even bother trying to load it into the DB and create a Java stored procedure.
You are trying to deal with too many different issues at the same time. Unless you solve your primary Java problem by fixing the code outside the DB you will have nothing but problems loading it into the DB.
And just get rid of this line of code - you don't need it anymore and it hasn't been done like that for many years now:
Class.forName("oracle.jdbc.driver.OracleDriver");

Export Release Build error - Exception in thread "main" java.lang.Error: Unable to find named traits

I've been developing an AIR application for Android and iOS. During development, I've run the application (in debug mode) in the desktop simulator as well as on an iPhone 4 and a Nook Tablet.
However, I recently tried to "Export Release Build" for iOS and hit the following error: (I've stripped out the package and class information in the error message below)
!ENTRY com.adobe.flexbuilder.project 4 43 2012-04-06 13:09:15.516
!MESSAGE Error occurred while packaging the application:
Exception in thread "main" java.lang.Error: Unable to find named traits: valid.package.path.here::ValidClassName
          at adobe.abc.Domain.resolveTypeName(Domain.java:231)
          at adobe.abc.Domain.resolveTypeName(Domain.java:148)
          at adobe.abc.GlobalOptimizer.sccp_eval(GlobalOptimizer.java:6665)
          at adobe.abc.GlobalOptimizer.sccp_analyze(GlobalOptimizer.java:5909)
          at adobe.abc.GlobalOptimizer.sccp(GlobalOptimizer.java:4628)
          at adobe.abc.GlobalOptimizer.optimize(GlobalOptimizer.java:3514)
          at adobe.abc.GlobalOptimizer.optimize(GlobalOptimizer.java:2215)
          at adobe.abc.LLVMEmitter.optimizeABCs(LLVMEmitter.java:526)
          at adobe.abc.LLVMEmitter.generateBitcode(LLVMEmitter.java:336)
          at com.adobe.air.ipa.AOTCompiler.convertAbcToLlvmBitcodeImpl(AOTCompiler.java:472)
          at com.adobe.air.ipa.BitcodeGenerator.main(BitcodeGenerator.java:82)
Compilation failed while executing : ADT
!STACK 0
java.lang.Exception
          at com.adobe.flexbuilder.project.internal.FlexProjectCore.createErrorStatus(FlexProjectCore. java:1019)
          at com.adobe.flexbuilder.util.logging.GlobalLogImpl.log(GlobalLogImpl.java:66)
          at com.adobe.flexbuilder.util.logging.GlobalLog.log(GlobalLog.java:52)
          at com.adobe.flexbuilder.exportimport.releaseversion.ui.ExportReleaseVersionWizard.doPackage (ExportReleaseVersionWizard.java:283)
          at com.adobe.flexbuilder.exportimport.releaseversion.ui.ExportReleaseVersionWizard.performFi nish(ExportReleaseVersionWizard.java:152)
          at org.eclipse.jface.wizard.WizardDialog.finishPressed(WizardDialog.java:827)
          at org.eclipse.jface.wizard.WizardDialog.buttonPressed(WizardDialog.java:432)
          at org.eclipse.jface.dialogs.Dialog$2.widgetSelected(Dialog.java:624)
          at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:240)
          at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
          at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4128)
          at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1457)
          at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1480)
          at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1465)
          at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1270)
          at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3974)
          at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3613)
          at org.eclipse.jface.window.Window.runEventLoop(Window.java:825)
          at org.eclipse.jface.window.Window.open(Window.java:801)
          at com.adobe.flexbuilder.exportimport.releaseversion.ExportReleaseVersionAction$1.run(Export ReleaseVersionAction.java:97)
          at com.adobe.flexbuilder.exportimport.releaseversion.ExportReleaseVersionAction.run(ExportRe leaseVersionAction.java:103)
          at org.eclipse.ui.internal.PluginAction.runWithEvent(PluginAction.java:251)
          at org.eclipse.ui.internal.WWinPluginAction.runWithEvent(WWinPluginAction.java:229)
          at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionI tem.java:584)
          at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:501)
          at org.eclipse.jface.action.ActionContributionItem$5.handleEvent(ActionContributionItem.java :411)
          at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
          at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4128)
          at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1457)
          at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1480)
          at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1465)
          at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1270)
          at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3974)
          at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3613)
          at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2696)
          at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2660)
          at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2494)
          at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:674)
          at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
          at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:667)
          at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
          at com.adobe.flexbuilder.standalone.FlashBuilderApplication.start(FlashBuilderApplication.ja va:108)
          at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
          at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLau ncher.java:110)
          at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.jav a:79)
          at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:344)
          at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
          at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
          at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
          at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
          at java.lang.reflect.Method.invoke(Method.java:597)
          at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:622)
          at org.eclipse.equinox.launcher.Main.basicRun(Main.java:577)
          at org.eclipse.equinox.launcher.Main.run(Main.java:1410)
The class the error message is referring to is defined with a SWC that my project links to. However, I've even tried to define a class with that same name (and location) within my project and it still fails to find it.
Why am I able to Project->Clean and run this project within the desktop AIR player (or on the device in debug mode) but unable to export it as a release build?
I have found a couple of threads mentioning a similar error but none of them have been marked as resolved.

At this point I feel I am talking to myself, but I will share my work-around in case it helps another who may stumble across this post.
In my particular case, both my main AIR application and my ANE wrapper library were referencing the same external Flex library (same revision). Both projects had the library linkage set to merge. Changing the linkage to "External" on one of the 2 libraries (it doesn't seem to matter which) and leaving the other as "Merged into code" enabled the export to complete without the bizarre "Unable to find named traits" error.

Error after compile Exception in thread "main" java.lang.NoClassDefFoundErr

Hi I am very new to Java programming, right now I am using a mac os 10.49
I can create java documents using bbedit and then they compile when i type
javac.
But when i type java *.java I get the following error
Exception in thread "main" java.lang.NoClassDefFoundError
If I type java "filename"
without the .java at the end of the file the terminal has no response
I understand i am supposed to some how set the classpath but i do not know how to do this
Also I can create and compile and then run my java in the eclipse program that i have installed, but not from terminal and im not sure why.
Thanks for the help.

I understand i am supposed to some how set the classpath but i do not know how
to do thisThere is no need to set a system variable CLASSPATH, it is inflexible to do so, and it can lead to unpredictable behaviour.
You should be able to compile and run programs from the command line, specifying the classpath as part of the commands you use.
(1) For instance, you can create a file HelloWorld.java with the following contents:public class HelloWorld {
public static void main(String args[]) {
System.out.println("Hello world");
}(2) From the command line (console) navigate to the folder (directory) containing this file and compile it with the commandjavac -cp . HelloWorld.javaThe "-cp ." part is what specifies the classpath. Note that it is a file that is being compiled so we specify the actual file name including the extension. At this point you should be able to check that the HelloWorld.class file has been created.
(3) From the same folder (directory) you run the program withjava -cp . HelloWorldThe classpath is being specified in the same way as before. It is a class that is being invoked, so we don't specify a filename. (much less use wildcards like *).
Documentation for the java and javac tools (and others) are linked to from this page: http://java.sun.com/javase/6/docs/index.html

Strange installation error!Thread: Exception in thread "main" java.lang.Uns

Hello Guys,
I did it in the morning also, but on a second machine i am getting this error:
I have installed centOS 5 and changed redhat-release file to show redhat-4
After installaing all the packages and setting all as per documentation when i try to run installer it is giving me the following error:
Starting Oracle Universal Installer...
Checking installer requirements...
Checking operating system version: must be redhat-3, SuSE-9, redhat-4, UnitedLinux-1.0, asianux-1 or asianux-2
Passed
All installer requirements met.
Preparing to launch Oracle Universal Installer from /tmp/OraInstall2011-05-24_01-12-02AM. Please wait ...[oracle@db database]$ Exception in thread "main" java.lang.UnsatisfiedLinkError: /tmp/OraInstall2011-05-24_01-12-02AM/jre/1.4.2/lib/i386/libawt.so: libXp.so.6: cannot open shared object file: No such file or directory
at java.lang.ClassLoader$NativeLibrary.load(Native Method)
at java.lang.ClassLoader.loadLibrary0(Unknown Source)
at java.lang.ClassLoader.loadLibrary(Unknown Source)
at java.lang.Runtime.loadLibrary0(Unknown Source)
at java.lang.System.loadLibrary(Unknown Source)
at sun.security.action.LoadLibraryAction.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.awt.NativeLibLoader.loadLibraries(Unknown Source)
at sun.awt.DebugHelper.<clinit>(Unknown Source)
at java.awt.Component.<clinit>(Unknown Source)
Please get me through this error.
Thanks, Imran

Thanks guys,
solved by installing libXp package.

SQLJ error: "Exception in thread main java.lang.NoClassDefFoundError: sqlj/

Hi,
I am new to SQLJ. Now, in my PC (with Win98), I have JDK 1.2 and Oracle 8i (personal edition). I have used Java and Oracle in my PC without any problem. Now, I am going to learn SQLJ in order to create a java program to access Oracle database. What I have done is to set up several classpaths in DOS:
SET classpath=C:\ora_program\sqlj\lib\translator.zip;
SET classpath=C:\ora_program\sqlj\lib\runtime.zip;
SET classpath=C:\ora_program\sqlj\lib\runtime12.zip;
SET classpath=C:\ora_program\jdbc\lib\classes12.zip;
The code of my program is:
import java.sql.Date;
import java.sql.SQLException;
import oracle.sqlj.runtime.Oracle;
import java.util.Date;
public class Hello{
     public static void main(String[] args){
          java.sql.Date current_date;
          try{
               // connect to the db
               Oracle.connect(
                    "C:\ora_program\bin",
                    "system",
                    "manager");
               // get the current date from the database
               #sql{SELECT sysdate INTO :current_date FROM dual};
               // display message
               System.out.println("Hello, the current date is: "+ current_date);
          catch(SQLException e){
               System.err.println("sqlException: "+e);
          finally{
               try{
                    Oracle.close();
               catch(SQLException e){
                    System.err.println("sqlException: "+e);
And then I compile my program in DOS with the typing: sqlj Hello.sqlj
The program cannot be compiled and the error message is:
"Exception in thread main java.lang.NoClassDefFoundError: sqlj/tools/Sqlj"
It indicates that the SQLJ translator class files cannot be found.
I have set up the classpath in DOS (see above). How does the error come? Please help. Thanks.
PC

>
SET classpath=C:\ora_program\sqlj\lib\translator.zip;
SET classpath=C:\ora_program\sqlj\lib\runtime.zip;
SET classpath=C:\ora_program\sqlj\lib\runtime12.zip;
SET classpath=C:\ora_program\jdbc\lib\classes12.zip;
The above only sets the classpath to the last value. You need to use the following.
SET classpath=%classpath%;C:\ora_program\sqlj\lib\runtime.zip;

Error:"exception in thread main:java.lang.noclassdeffound error.

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