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
as well (on Win XP). So I am ready to run - ...
Now when I finally try to run the Java application, it throws this
exception when it tries to create the Foo instance:
at Foo.<init>(Foo.java:11)
at
sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstruct
orAccessorImpl.java:39)
at
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingC
onstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:
513)
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)
at sun.applet.AppletPanel.run(AppletPanel.java:369)
at java.lang.Thread.run(Thread.java:619)
Caused by: java.security.AccessControlException: access denied
(java.lang.Runtim
ePermission loadLibrary.Foo)
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...
exactlyNot quite exactly. Yours is an applet, theirs is an application.
Applets are not allowed many things that applications can do.
Among them, loading native libraries.

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Message was edited by:
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Check whether you are providing the correct login credentials while importing the RFC.

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java.lang.NullPointerException
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!ENTRY com.tssap.util 4 0 Mar 18, 2008 15:02:50.286
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   Plugin ID : com.sap.ide.webdynpro.modeleditor
   Class      : com.sap.ide.webdynpro.modeleditor.ModelEditorCallback
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If you have Windows Seven (and probably Windows Vista) ...
Close NWDS.
Make backup \IDE70\eclipse\plugins\com.sap.ide.jcb.core_2.0.0\SapJavaConnectivityBuilderCore.jar.
Get file-archive \IDE70\eclipse\plugins\com.sap.ide.jcb.core_2.0.0\SapJavaConnectivityBuilderCore.jar,
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Change this .class file in any HexEditor,
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Scott

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Raj,
Thanks for your reply.
I had already solved the problem... After a long time I found out it was due to the language: when creating an RFC model one should use the language of SLD.
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Jeroen

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     at java.awt.Window.dispatchEventImpl(Window.java:2478)
     at java.awt.Component.dispatchEvent(Component.java:4482)
     at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:644)
     at java.awt.EventQueue.access$000(EventQueue.java:85)
     at java.awt.EventQueue$1.run(EventQueue.java:603)
     at java.awt.EventQueue$1.run(EventQueue.java:601)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
     at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:98)
     at java.awt.EventQueue$2.run(EventQueue.java:617)
     at java.awt.EventQueue$2.run(EventQueue.java:615)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
     at java.awt.EventQueue.dispatchEvent(EventQueue.java:614)
     at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
     at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
     at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
     at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
     at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
     at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
Caused by: java.sql.SQLException: The model generated by the model mapper was not accepted by a validator: Model not accepted: Namespace not found:
     at com.sunopsis.jdbc.driver.xml.SnpsXmlDTD.initialize(SnpsXmlDTD.java:389)
     at com.sunopsis.jdbc.driver.xml.SnpsXmlDTD.initialize(SnpsXmlDTD.java:421)
     at com.sunopsis.jdbc.driver.xml.SnpsXmlDTD.<init>(SnpsXmlDTD.java:150)
     at com.sunopsis.jdbc.driver.xml.SnpsXmlSchema.<init>(SnpsXmlSchema.java:478)
     at com.sunopsis.jdbc.driver.xml.SnpsXmlSchemaManager.createNewSchema(SnpsXmlSchemaManager.java:292)
     at com.sunopsis.jdbc.driver.xml.SnpsXmlSchemaManager.getSchemaFromProperties(SnpsXmlSchemaManager.java:270)
     at com.sunopsis.jdbc.driver.xml.SnpsXmlDriver.connect(SnpsXmlDriver.java:114)
     at oracle.odi.jdbc.datasource.DriverManagerUtils$DriverProxy.connect(DriverManagerUtils.java:23)
     at oracle.odi.jdbc.datasource.DriverManagerDataSource.getConnectionFromDriverManager(DriverManagerDataSource.java:368)
     at oracle.odi.jdbc.datasource.DriverManagerDataSource.getConnectionFromDriverManager(DriverManagerDataSource.java:352)
     at oracle.odi.jdbc.datasource.DriverManagerDataSource.getConnectionFromDriverManager(DriverManagerDataSource.java:316)
     at oracle.odi.jdbc.datasource.DriverManagerDataSource.getConnection(DriverManagerDataSource.java:275)
     at oracle.odi.jdbc.datasource.LoginTimeoutDatasourceAdapter.doGetConnection(LoginTimeoutDatasourceAdapter.java:99)
     at oracle.odi.jdbc.datasource.LoginTimeoutDatasourceAdapter.getConnection(LoginTimeoutDatasourceAdapter.java:62)
     at oracle.odi.jdbc.datasource.LoginTimeoutDatasourceAdapter$ConnectionProcessor.run(LoginTimeoutDatasourceAdapter.java:217)
     at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
     at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
     at java.util.concurrent.FutureTask.run(FutureTask.java:138)
     at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
     at java.lang.Thread.run(Thread.java:662)

Hi,
Thans for your reply.
This is the DTD for my xmldoc.
<!ELEMENT Data (Department+)>
<!ELEMENT EmployeeID (#PCDATA)>
<!ATTLIST EmployeeID col (EMPID) #IMPLIED>
<!ELEMENT Education (EmployeeID, Sequence, Dgree)>
<!ATTLIST Education table NMTOKEN #IMPLIED>
<!ELEMENT Employee (EmployeeName, EmployeeID, DepartmentID, Education*)>
<!ATTLIST Employee table NMTOKEN #IMPLIED>
<!ELEMENT EmployeeName (#PCDATA)>
<!ATTLIST EmployeeName col NMTOKEN #IMPLIED>
<!ELEMENT DepartName (#PCDATA)>
<!ATTLIST DepartName col NMTOKEN #IMPLIED>
<!ELEMENT Table (Column+)>
<!ATTLIST Table importType NMTOKEN #IMPLIED>
<!ATTLIST Table parentTable NMTOKEN #IMPLIED>
<!ATTLIST Table tag NMTOKEN #IMPLIED>
<!ATTLIST Table columns NMTOKEN #IMPLIED>
<!ATTLIST Table name NMTOKEN #IMPLIED>
<!ELEMENT DepartID (#PCDATA)>
<!ATTLIST DepartID col NMTOKEN #IMPLIED>
<!ELEMENT MetaData (Table+)>
<!ELEMENT Sequence (#PCDATA)>
<!ATTLIST Sequence col NMTOKEN #IMPLIED>
<!ELEMENT Dgree (#PCDATA)>
<!ATTLIST Dgree col NMTOKEN #IMPLIED>
<!ELEMENT Export (MetaData, Data)>
<!ELEMENT DepartmentID (#PCDATA)>
<!ATTLIST DepartmentID col NMTOKEN #IMPLIED>
<!ELEMENT Column (#PCDATA)>
<!ATTLIST Column deleteKey NMTOKEN #IMPLIED>
<!ATTLIST Column isKey NMTOKEN #IMPLIED>
<!ELEMENT Department (DepartName, DepartID, Employee+)>
<!ATTLIST Department table NMTOKEN #IMPLIED>
Thanks again!
Yan

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

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