Exception in Class class native method

Hi Guys,
I am getting an Exception in the Class class native method getMethod0. The Exception is java.lang.NoSuchMethodException. Can some put light on this, as to why is this coming???
Here's the starckTrace........
java.lang.NoSuchMethodException
     at java.lang.Class.getMethod0(Native Method)
     at java.lang.Class.getMethod(Class.java:888)
     at com.gepower.gees.vc.utility.VCComparator.compare(VCComparator.java:67)
     at java.util.Arrays.mergeSort(Arrays.java:1181)
     at java.util.Arrays.mergeSort(Arrays.java:1189)
     at java.util.Arrays.mergeSort(Arrays.java:1189)
     at java.util.Arrays.mergeSort(Arrays.java:1188)
     at java.util.Arrays.mergeSort(Arrays.java:1189)
     at java.util.Arrays.mergeSort(Arrays.java:1189)
     at java.util.Arrays.mergeSort(Arrays.java:1188)
     at java.util.Arrays.sort(Arrays.java:1128)
     at java.util.Collections.sort(Collections.java:121)
Thanx,
Chandan.

Class.getMethod() throws that exception if the method that is being searched for does not exist.
And VCComparator.compare() used Class.getMethod().
So something is wrong in VCComparator.compare().

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Message was edited by:
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Not gonna happen. Yes, like ejp hinted, you could run an X-environment on your local machine and have the Swing UI tunnel its output there, but are you sure you want GUI apps to run on a remote machine like that? It's not gonna be fun to work with, I'll tell you that.
Why not create a Java WebStart app (or perhaps even an applet) out of your application, so your users can run the application locally?

NullPointerException at java.lang.Class.forNameImpl(Native Method)

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Exception when creating instance of a class with native method by JNI

I am trying to use JNI - I want to have a Java class Foo have a
method, that is a native C function.
I follow the Sun's tutorial
http://java.sun.com/developer/onlineTraining/Programming/JDCBook/jnie...
exactly, and everything compiles fine, and I have compiled my C .dll
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Now when I finally try to run the Java application, it throws this
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at Foo.<init>(Foo.java:11)
at
sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstruct
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at
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingC
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at java.lang.reflect.Constructor.newInstance(Constructor.java:
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at java.lang.Class.newInstance0(Class.java:355)
at java.lang.Class.newInstance(Class.java:308)
at sun.applet.AppletPanel.createApplet(AppletPanel.java:786)
at sun.applet.AppletPanel.runLoader(AppletPanel.java:715)
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(java.lang.Runtim
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Why would this be so??? Thank you for your insights

Mark_Galeck wrote:
I am trying to use JNI - I want to have a Java class Foo have a
method, that is a native C function.
I follow the Sun's tutorial
http://java.sun.com/developer/onlineTraining/Programming/JDCBook/jnie...
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Applets are not allowed many things that applications can do.
Among them, loading native libraries.

NoClassDefFoundError problems -native method

hi all,
i've got a wierd problem... when i try to run a java appln ( for instance curl.java whose class is stored in a jar file) without giving a proper argument say like:
java XX.RR.YY.curl
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Usage: XX.RR.YY.hyd <options>
but when i try to run the same program - this time giving it a valid argument- like :
java XX.RR.YY.curl -curltest.xml
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my point is why does java fail to find the class when i give it a valid argument and not when i do not give it any.
thanks in advance

exactly ... my java program has a similar code in it
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class(yay! my classpath is right) and had run thru a
few lines of code to get to the point where it
realized it needed some arguments and so gently asked
me supply an argument (a valid filename in my case)...Did you write this code? Did you put in the line where it displays the usage?
so the next thing i do is run the same command java
xx.xx.xx -curltest.xml ( i've supplied a valid
argument this time ) ... the result :
Exception in thread "main"
java.lang.NoClassDefFoundError
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:130)
why did java fail to grab my appln class this time -
in contrast to the first time where it found the class
file w/o any problems. Try just using "java xx.xx.xx curltest.xml" (without the '-').

Accessing a native method from within a packaged class

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This is on Windows XP. I am also using VisualAge for Java. I also am using JDK 1.3.1.
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* @date (10/15/2003 10:30:59 AM)
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/* DO NOT EDIT THIS FILE - it is machine generated */
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#define IncludedJNIGetUserId
#ifdef __cplusplus
extern "C" {
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* Class: JNIGetUserId
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JNIEXPORT jstring JNICALL Java_com_localoptions_JNIGetUserId_getUser
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#ifdef __cplusplus
#endif
#endif
// Implements method to return a string to Java
// C++ core header
#include <iostream.h>
// header from Java Interface
#include "JNIGetUserId.h"
#include "JNIGetUserId2.h"
// returns a string back to Java for package structure
JNIEXPORT jstring JNICALL Java_com_services_localoptions_JNIGetUserId_getUser
( JNIEnv * env, jobject thisObject )
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// returns a string back to Java for flat structure
JNIEXPORT jstring JNICALL Java_JNIGetUserId_getUser
( JNIEnv * env1, jobject thisObject1 )
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     char* userid1 = "RROWEHL1";
     // return userid to caller
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}

Ok. A co-worker figured it out for me. The key thing is to do "javah com.services.localoptions.JNIGetUserId". Note the use of "." instead of "\". Running on windows, I was used to doing "\". That was part of the problem. Another key is doing the javah at the top of the package structure. This was mentioned in a post over at IBM.
We got our JNI stuff working now. thanks, ray.

Class not found -java.security.AccessController.doPrivileged(Native Method)

The applet was working fine around 6 months back but now the application is throwing the below exception:
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java.lang.ClassNotFoundException: DisiConnectionApplet.class
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I have checked and found the class is on proper place... I googled the issue and found that there might be any issue in IE settings... but didn't get any proper solution...
I am using IE 6.0 with below Java plug-in :::::::::::::
Java Plug-in 1.6.0_11
Java(tm) Plug-in 2 SSV Helper
Java(tm) Plug-in SSV Helper
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its exactly that... and who are you calling a fool? I think its a case of the pot calling the kettle black there mate (except you have no right to call me anything, since you are the one looking for help, and we are the ones that know)... oh and check the date... it says aug 2003... is that a month ago? come back in a month and i'll give you your answer then

How do I declare a native method outside of the main class?

Hi
This is a JNI particular question.
I am having a problem with generating the header .h file after executing javah. The file is generated correctly but is empty under certain circumstances.
This is the 'empty file:
=================
/* DO NOT EDIT THIS FILE - it is machine generated */
#include <jni.h>
/* Header for class gui_GuiMain */
#ifndef Includedgui_GuiMain
#define Includedgui_GuiMain
#ifdef __cplusplus
extern "C" {
#endif
#ifdef __cplusplus
#endif
#endif
This is what it should look like:
=========================
/* DO NOT EDIT THIS FILE - it is machine generated */
#include <jni.h>
/* Header for class gui_GuiMain */
#ifndef Includedgui_GuiMain
#define Includedgui_GuiMain
#ifdef __cplusplus
extern "C" {
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* Class: gui_GuiMain
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* Signature: ()V
JNIEXPORT void JNICALL Java_gui_GuiMain_getValueOIDTestMIB
(JNIEnv *, jobject);
#ifdef __cplusplus
#endif
#endif
The header file becomes "empty" when the native function getValueOIDTestMIB is declared in a different class than what my main() function is declared in.
For example something like this will work:
class Main
public native void getValueOIDTestMIB
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System.loadLibrary("libsnmp++");
//............some more functions etc.............
public static void main(String[] args)
//............some more stuff...........................
But when I declare this:
public native void getValueOIDTestMIB
static {
System.loadLibrary("libsnmp++");
outside the class, in another class within the same package, nothing happens.
I am probabily doing something stupid. Can somebody help or give me some guidance to where I should look. I come from a C++ background, not a guru in Java.
Thanks

You need to run javah and give it as a parameter the full class name of the class which contains the native methods.
For example (if your class is called A and its package is a.b.c)
javah -jni a.b.c.A

Native method in local class

Hi there,
this is a repost of my question but now in the right forum.
I have a problem with a native method of a local class that hides a member class:
public class SomeClass
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}The class MemberClass exist in two different ways. Every class has it's own out() method. The local class just hides the member class. Now I want to implement the native methods bla() of the two classes.
If I call
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SomeClass.class
SomeClass$MemberClass.class
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If I use
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Therefore I call
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Interesting...From the JLS under "fully qualified name"
[http://java.sun.com/docs/books/jls/third_edition/html/names.html#71701]
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[http://java.sun.com/javase/6/docs/technotes/guides/jni/spec/functions.html#wp16027]
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Native methods inside C++ class

Hey all,
Tried posting this already but it didn't appear in the forums. So apologies if this appears twice on same forum :o)
Want to wrap my native methods inside a C++ class but get UnsatisfiedLinkerError when I do. Is it possible to do this? Do I have to change some method signatures or what?
I want something like :
public class A
native void doSomething();
class B
public:
JNIEXPORT void JNI Java_A_doSomething() { ... } /* or whatever */
It works ok outside of a C++ class but I'd prefer to contain my methods inside a class. Any help?
Cheers,
Conor

Java needs to find your functions in the DLL or SO. But the names are "mangled" if you declare the function inside a class - even declaring the function "static" does not help. For instance, using the Microsoft C++ compiler:
class B
public:
static JNIEXPORT void JNI Java_A_doSomething() { ... }
};the name is mangled to ?Java_A_doSomething@B@@SAXXZ
But Java tries to locate the entry _Java_A_doSomething@0 in the DLL.
You can write the global functions as:
JNIEXPORT void JNI Java_A_doSomething() {
B::doSomething();
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I would like to know that which method of object class is a native method..........

flounder wrote:
The natives are getting restless.
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h3. Aborigines
Persons of little worth found cumbering the soil of a newly discovered country. They soon cease to cumber; they fertilize.

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     at sun.instrument.InstrumentationImpl.loadClassAndStartAgent(InstrumentationImpl.java:323)
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     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)
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     at org.eclipse.persistence.internal.jpa.deployment.JavaSECMPInitializerAgent.premain(JavaSECMPInitializerAgent.java:38)
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Exception Description: Predeployment of PersistenceUnit [SAM_CM_AUTONUM_GEN] failed.
Internal Exception: Exception [EclipseLink-7161] (Eclipse Persistence Services - 1.0.2 (Build 20081024)): org.eclipse.persistence.exceptions.ValidationException
Exception Description: Entity class [class oracle.SamCmAutonumGen] has no primary key specified. It should define either an @Id, @EmbeddedId or an @IdClass. If you have defined PK using any of these annotations then please make sure that you do not have mixed access-type (both fields and properties annotated) in your entity class hierarchy.
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     at org.eclipse.persistence.internal.jpa.deployment.JPAInitializer.initPersistenceUnits(JPAInitializer.java:149)
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Exception Description: Predeployment of PersistenceUnit [SAM_CM_AUTONUM_GEN] failed.
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Exception Description: Entity class [class oracle.SamCmAutonumGen] has no primary key specified. It should define either an @Id, @EmbeddedId or an @IdClass. If you have defined PK using any of these annotations then please make sure that you do not have mixed access-type (both fields and properties annotated) in your entity class hierarchy.
     at org.eclipse.persistence.exceptions.EntityManagerSetupException.predeployFailed(EntityManagerSetupException.java:210)
     ... 17 more
Caused by: Exception [EclipseLink-7161] (Eclipse Persistence Services - 1.0.2 (Build 20081024)): org.eclipse.persistence.exceptions.ValidationException
Exception Description: Entity class [class oracle.SamCmAutonumGen] has no primary key specified. It should define either an @Id, @EmbeddedId or an @IdClass. If you have defined PK using any of these annotations then please make sure that you do not have mixed access-type (both fields and properties annotated) in your entity class hierarchy.
     at org.eclipse.persistence.exceptions.ValidationException.noPrimaryKeyAnnotationsFound(ValidationException.java:1245)
     at org.eclipse.persistence.internal.jpa.metadata.accessors.classes.EntityAccessor.validatePrimaryKey(EntityAccessor.java:1173)
     at org.eclipse.persistence.internal.jpa.metadata.accessors.classes.EntityAccessor.process(EntityAccessor.java:486)
     at org.eclipse.persistence.internal.jpa.metadata.MetadataProcessor.processORMMetadata(MetadataProcessor.java:443)
FATAL ERROR in native method: processing of -javaagent failed
     at org.eclipse.persistence.internal.jpa.deployment.PersistenceUnitProcessor.processORMetadata(PersistenceUnitProcessor.java:303)
     at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.predeploy(EntityManagerSetupImpl.java:830)
     ... 16 more
Exception in thread "main" Process exited with exit code 1.

Hi,
you may want to try the J2EE forum here on OTN in case you don't get a sufficient answer to the problem.
Frank

Getting the JAXB exception like "Two classes have the same XML type name-"

Getting the JAXB exception like "Two classes have the same XML type name...",
Here is the exception details:
Exception in thread "main" com.sun.xml.internal.bind.v2.runtime.IllegalAnnotationsException: 1 counts of IllegalAnnotationExceptions Two classes have the same XML type name "city". Use @XmlType.name and @XmlType.namespace to assign different names to them. this problem is related to the following location: at com.model.City at public com.model.City com.model.Address.getCurrentCity() at com.model.Address this problem is related to the following location: at com.common.City at public com.common.City com.model.Address.getPreviousCity() at com.model.Address
at com.sun.xml.internal.bind.v2.runtime.IllegalAnnotationsException$Builder.check(Unknown Source) at com.sun.xml.internal.bind.v2.runtime.JAXBContextImpl.getTypeInfoSet(Unknown Source) at com.sun.xml.internal.bind.v2.runtime.JAXBContextImpl.(Unknown Source) at com.sun.xml.internal.bind.v2.runtime.JAXBContextImpl$JAXBContextBuilder.build(Unknown Source) at com.sun.xml.internal.bind.v2.ContextFactory.createContext(Unknown Source) at com.sun.xml.internal.bind.v2.ContextFactory.createContext(Unknown Source) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at javax.xml.bind.ContextFinder.newInstance(Unknown Source) at javax.xml.bind.ContextFinder.find(Unknown Source) at javax.xml.bind.JAXBContext.newInstance(Unknown Source) at javax.xml.bind.JAXBContext.newInstance(Unknown Source) at com.PojoToXSD.main(PojoToXSD.java:17)
I took the example like:
package com.model; ---->this package contains 'Address' class and 'City' class
public class Address {
private String areaName; private City currentCity; private com.common.City previousCity;
package com.model;
public class City {
private String cityName;
Another city class in "com.common" package.
package com.common;
public class City {
private String pinCode;
We need to create XSDs and needs to do the Marshalling and unmarshalling with the existing code in our project(like as above example code), code does not have any annotations like "@XmlRootElement/@XmlType" and we can not able to change the source code.
I would like to know is there any solution to fix the above issue or any other ways to create XSDs and marshaling/unmarshalling(like MOXy..etc)?
It would be great if i can get the solution from any one....May thanks in advance.
Thanks,
Satya.

Getting the JAXB exception like "Two classes have the same XML type name...",
Here is the exception details:
Exception in thread "main" com.sun.xml.internal.bind.v2.runtime.IllegalAnnotationsException: 1 counts of IllegalAnnotationExceptions Two classes have the same XML type name "city". Use @XmlType.name and @XmlType.namespace to assign different names to them. this problem is related to the following location: at com.model.City at public com.model.City com.model.Address.getCurrentCity() at com.model.Address this problem is related to the following location: at com.common.City at public com.common.City com.model.Address.getPreviousCity() at com.model.Address
at com.sun.xml.internal.bind.v2.runtime.IllegalAnnotationsException$Builder.check(Unknown Source) at com.sun.xml.internal.bind.v2.runtime.JAXBContextImpl.getTypeInfoSet(Unknown Source) at com.sun.xml.internal.bind.v2.runtime.JAXBContextImpl.(Unknown Source) at com.sun.xml.internal.bind.v2.runtime.JAXBContextImpl$JAXBContextBuilder.build(Unknown Source) at com.sun.xml.internal.bind.v2.ContextFactory.createContext(Unknown Source) at com.sun.xml.internal.bind.v2.ContextFactory.createContext(Unknown Source) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at javax.xml.bind.ContextFinder.newInstance(Unknown Source) at javax.xml.bind.ContextFinder.find(Unknown Source) at javax.xml.bind.JAXBContext.newInstance(Unknown Source) at javax.xml.bind.JAXBContext.newInstance(Unknown Source) at com.PojoToXSD.main(PojoToXSD.java:17)
I took the example like:
package com.model; ---->this package contains 'Address' class and 'City' class
public class Address {
private String areaName; private City currentCity; private com.common.City previousCity;
package com.model;
public class City {
private String cityName;
Another city class in "com.common" package.
package com.common;
public class City {
private String pinCode;
We need to create XSDs and needs to do the Marshalling and unmarshalling with the existing code in our project(like as above example code), code does not have any annotations like "@XmlRootElement/@XmlType" and we can not able to change the source code.
I would like to know is there any solution to fix the above issue or any other ways to create XSDs and marshaling/unmarshalling(like MOXy..etc)?
It would be great if i can get the solution from any one....May thanks in advance.
Thanks,
Satya.

Error when testing a webservice - Exception raised in class CL_SOAP_REGIST

Dear coleagues,
I've got an issue concerning the AS ABAP SOAP Runtime. The system is an ERP 6.0 with SP13.
If I try to test the service in WSADMIN by using the test-button, I just get an exception after the internet browser opens:
A Soap Core Exception was raised in Method CL_SOAP_REGISTRY::generate_wsdl(6)
Technical Details of Soap Core Exception
Message Text: SRT: ASSERT failed: object reference not bound
Class: CL_SOAP_REGISTRY
Method: generate_wsdl
LocationID: 6
Program: CL_SOAP_REGISTRY==============CP
Include: CL_SOAP_REGISTRY==============CM00J
Line: 59
I did a look into the coding and think that the exception is raised since the methode
Hi folks,
I've got an issue concerning the AS ABAP SOAP Runtime. The system is an ERP 6.0 with SP13.
At first I create a Web Service by using the context menue of an existing rfc-enabled function module. Afterwards the service is visible in SICF. If I try to test the service in WSADMIN by using the test-button I only get an exception in the opening internet browser:
Cannot download WSDL from http://serverurl:8027/sap/bc/srt/rfc/sap/ZSTMA_FUNKTIONSTEST2?sap-client=100&wsdl=1.1: Invalid Response Code: (400) Bad Request. The requested URL was:"http://ciswi.sap.swm.de:8027/sap/bc/srt/rfc/sap/ZSTMA_FUNKTIONSTEST2?sap-client=100&wsdl=1.1"
If I go onto the used url I get the following message:
Your request could not be processed
SRT: ASSERT failed: object reference not bound
What has happened?
A Soap Core Exception was raised in Method CL_SOAP_REGISTRY::generate_wsdl(6)
Technical Details of Soap Core Exception
Message Text: SRT: ASSERT failed: object reference not bound
Class: CL_SOAP_REGISTRY
Method: generate_wsdl
LocationID: 6
Program: CL_SOAP_REGISTRY==============CP
Include: CL_SOAP_REGISTRY==============CM00J
Line: 59
I did a look into the coding and found out that the exception is raised since
Hi folks,
I've got an issue concerning the AS ABAP SOAP Runtime. The system is an ERP 6.0 with SP13.
At first I create a Web Service by using the context menue of an existing rfc-enabled function module. Afterwards the service is visible in SICF. If I try to test the service in WSADMIN by using the test-button I only get an exception in the opening internet browser:
Cannot download WSDL from http://serverurl:8027/sap/bc/srt/rfc/sap/ZSTMA_FUNKTIONSTEST2?sap-client=100&wsdl=1.1: Invalid Response Code: (400) Bad Request. The requested URL was:"http://ciswi.sap.swm.de:8027/sap/bc/srt/rfc/sap/ZSTMA_FUNKTIONSTEST2?sap-client=100&wsdl=1.1"
If I go onto the used url I get the following message:
Your request could not be processed
SRT: ASSERT failed: object reference not bound
What has happened?
A Soap Core Exception was raised in Method CL_SOAP_REGISTRY::generate_wsdl(6)
Technical Details of Soap Core Exception
Message Text: SRT: ASSERT failed: object reference not bound
Class: CL_SOAP_REGISTRY
Method: generate_wsdl
LocationID: 6
Program: CL_SOAP_REGISTRY==============CP
Include: CL_SOAP_REGISTRY==============CM00J
Line: 59
I found out that the exception is raised since CL_SRT_WSDL_GEN_FACTORY=>GET_WSDL_GENERATOR doesn't return an instance of the class referring to the interface IF_SRT_WSDL_GEN.
If I test that method in SE24 using the name of the service definition in SE80 for the parameter WSD, the value '1' fpr the parameters TYPE and STYLE, an instance of the class CL_SRT_WSDL11_GEN is rendered.
Could you give any hints how I could debug that issue to verify the import parameters when the static method CL_SRT_WSDL_GEN_FACTORY=>GET_WSDL_GENERATOR is called in the body of the browser call ?
Or any other hints?
Thank you very much and best regards
Stefan

The issue was due to missing authorizations of the RFC-user (type 'Communication') calling the webservice. The RFC-user itsself has been assigned before to the webservice in the http-service tree (transaction SICF). RFC-User needs (at least) the role SAP_BC_WEBSERVICE.

Exception in Class class native method

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