Why I can't call my native method from my package?

it is fine if my java code didn't complied into a package.
But if I complied my java code as a package, and call its native method outside. It give me "UnsatisfiedLinkError". And can not find my method. It is indeed the method is inside.
Thank a lot any helps. Email me on [email protected]

I have found that javah does not generate the correct JNI function names when the native function is in a class that is within a Java package. The net result is an Unsatisfied link error.
The JNI function name must be included in the package name. The naming is a bit complicated and that's why javah should be used, except in this case it does not work. I can't quite remember exactly how it works, something like adding in packagename_1 into the JNI name. The SWIG tool (http://www.swig.org) does generate the correct names when using packages. It is a tool which takes C or C++ header files and generates the JNI and Java classes for you so that you can call C/C++ code from Java. Once you have installed SWIG and run 'make check', have a look in the directory Examples/test-suite/java for the JNI naming for packages. I'll try remember to post the exact naming if you don't want to install SWIG.

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Hi,
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Hi guys,
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# An unexpected error has been detected by HotSpot Virtual Machine:
# EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x052bd55f, pid=2740, tid=3884
# Java VM: Java HotSpot(TM) Client VM (1.5.0_07-b03 mixed mode, sharing)
# Problematic frame:
# C [F3BC1ENG.DLL+0xd55f]
In the log file,
# An unexpected error has been detected by HotSpot Virtual Machine:
# EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x052bd55f, pid=2740, tid=3884
# Java VM: Java HotSpot(TM) Client VM (1.5.0_07-b03 mixed mode, sharing)
# Problematic frame:
# C [F3BC1ENG.DLL+0xd55f]
--------------- T H R E A D ---------------
Current thread (0x03b26e50): JavaThread "httpWorkerThread-8080-0" daemon [_thread_in_native, id=3884]
siginfo: ExceptionCode=0xc0000005, reading address 0x05e71000
Registers:
EAX=0x31304443, EBX=0x05d048f0, ECX=0x0c4c0d16, EDX=0x05e70000
ESP=0x2c76ef38, EBP=0x2c76f034, ESI=0x05e71000, EDI=0x05d06d20
EIP=0x052bd55f, EFLAGS=0x00010213
Top of Stack: (sp=0x2c76ef38)
0x2c76ef38: 00000001 052a9264 2c76f228 052a92a4
0x2c76ef48: 01190002 00000000 00000000 00000000
0x2c76ef58: 00000000 ffffffff 00000002 05d05d38
0x2c76ef68: 00000000 00000000 00000000 00000000
0x2c76ef78: ffffffff 7c9106eb 00000004 00000000
0x2c76ef88: 00000000 00000000 00000000 00000000
0x2c76ef98: 00000000 00000000 00000000 00000000
0x2c76efa8: 00000000 052bf3e1 2c76efd4 0000101f
Instructions: (pc=0x052bd55f)
0x052bd54f: 00 8b 7c 24 2c 8b 4a 18 8d 72 18 8b c1 c1 e9 02
0x052bd55f: f3 a5 8b c8 eb 16 8b b4 24 bc 00 00 00 8b 7c 24
Stack: [0x2c670000,0x2c770000), sp=0x2c76ef38, free space=1019k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
C [F3BC1ENG.DLL+0xd55f]
Java frames: (J=compiled Java code, j=interpreted, Vv=VM code)
j palmsecuresdk.sample.PvsAuthenticationJNI.identifyMatch(I[BLjava/util/List;ILjava/util/List;)I+0
j packService.palmsImpl.identify([B)Ljava/lang/String;+55
j packService.palmsSEI_Tie.invoke_identify(Lcom/sun/xml/rpc/server/StreamingHandlerState;)V+50
j packService.palmsSEI_Tie.processingHook(Lcom/sun/xml/rpc/server/StreamingHandlerState;)V+58
j com.sun.xml.rpc.server.StreamingHandler.handle(Lcom/sun/xml/rpc/spi/runtime/SOAPMessageContext;)V+819
j com.sun.xml.rpc.server.http.JAXRPCServletDelegate.doPost(Ljavax/servlet/http/HttpServletRequest;Ljavax/servlet/http/HttpServletResponse;)V+394
j com.sun.enterprise.webservice.JAXRPCServlet.doPost(Ljavax/servlet/http/HttpServletRequest;Ljavax/servlet/http/HttpServletResponse;)V+139
j javax.servlet.http.HttpServlet.service(Ljavax/servlet/http/HttpServletRequest;Ljavax/servlet/http/HttpServletResponse;)V+139
j javax.servlet.http.HttpServlet.service(Ljavax/servlet/ServletRequest;Ljavax/servlet/ServletResponse;)V+30
j org.apache.catalina.core.ApplicationFilterChain.servletService(Ljavax/servlet/ServletRequest;Ljavax/servlet/ServletResponse;Ljavax/servlet/Servlet;Lorg/apache/catalina/util/InstanceSupport;)V+93
j org.apache.catalina.core.StandardWrapperValve.invoke(Lorg/apache/catalina/Request;Lorg/apache/catalina/Response;)I+644
j org.apache.catalina.core.StandardPipeline.doInvoke(Lorg/apache/catalina/Request;Lorg/apache/catalina/Response;)V+77
j org.apache.catalina.core.StandardPipeline.invoke(Lorg/apache/catalina/Request;Lorg/apache/catalina/Response;)V+3
j org.apache.catalina.core.StandardContextValve.invokeInternal(Lorg/apache/catalina/Wrapper;Lorg/apache/catalina/Request;Lorg/apache/catalina/Response;)I+238
j org.apache.catalina.core.StandardContextValve.invoke(Lorg/apache/catalina/Request;Lorg/apache/catalina/Response;)I+252
j org.apache.catalina.core.StandardPipeline.doInvoke(Lorg/apache/catalina/Request;Lorg/apache/catalina/Response;)V+77
j com.sun.enterprise.web.WebPipeline.invoke(Lorg/apache/catalina/Request;Lorg/apache/catalina/Response;)V+53
j org.apache.catalina.core.StandardHostValve.invoke(Lorg/apache/catalina/Request;Lorg/apache/catalina/Response;)I+89
j org.apache.catalina.core.StandardPipeline.doInvoke(Lorg/apache/catalina/Request;Lorg/apache/catalina/Response;)V+77
j com.sun.enterprise.web.VirtualServerPipeline.invoke(Lorg/apache/catalina/Request;Lorg/apache/catalina/Response;)V+149
j org.apache.catalina.core.ContainerBase.invoke(Lorg/apache/catalina/Request;Lorg/apache/catalina/Response;)V+6
j org.apache.catalina.core.StandardEngineValve.invoke(Lorg/apache/catalina/Request;Lorg/apache/catalina/Response;)I+58
j org.apache.catalina.core.StandardPipeline.doInvoke(Lorg/apache/catalina/Request;Lorg/apache/catalina/Response;)V+77
j org.apache.catalina.core.StandardPipeline.invoke(Lorg/apache/catalina/Request;Lorg/apache/catalina/Response;)V+3
j org.apache.catalina.core.ContainerBase.invoke(Lorg/apache/catalina/Request;Lorg/apache/catalina/Response;)V+6
j org.apache.coyote.tomcat5.CoyoteAdapter.service(Lorg/apache/coyote/Request;Lorg/apache/coyote/Response;)V+296
j com.sun.enterprise.web.connector.grizzly.ProcessorTask.invokeAdapter()V+19
j com.sun.enterprise.web.connector.grizzly.ProcessorTask.processNonBlocked(Ljava/io/InputStream;Ljava/io/OutputStream;)Z+15
j com.sun.enterprise.web.connector.grizzly.ProcessorTask.process(Ljava/io/InputStream;Ljava/io/OutputStream;)Z+25
j com.sun.enterprise.web.connector.grizzly.ReadTask.executeProcessorTask()Z+74
j com.sun.enterprise.web.connector.grizzly.ReadTask.doTask()V+161
j com.sun.enterprise.web.connector.grizzly.TaskBase.run()V+1
j com.sun.enterprise.web.connector.grizzly.WorkerThread.run()V+22
v ~StubRoutines::call_stub
--------------- P R O C E S S ---------------
Java Threads: ( => current thread )
0x037aec00 JavaThread "AWT-Windows" daemon [_thread_in_native, id=2664]
0x0376bb10 JavaThread "Java2D Disposer" daemon [_thread_blocked, id=4020]
0x03a526c0 JavaThread "Thread-25" daemon [_thread_blocked, id=2508]
0x03a3b8e8 JavaThread "Timer-5" daemon [_thread_blocked, id=2260]
0x03a51e18 JavaThread "Timer-4" [_thread_blocked, id=2192]
0x035bae38 JavaThread "ContainerBackgroundProcessor[StandardEngine[com.sun.appserv].StandardHost[server].StandardContext[__JWSappclients]]" daemon [_thread_blocked, id=2548]
0x035fac10 JavaThread "httpWorkerThread-4848-1" daemon [_thread_blocked, id=3492]
0x03786530 JavaThread "httpWorkerThread-4848-0" daemon [_thread_blocked, id=1952]
0x035fa9e8 JavaThread "SelectorThread-4848" [_thread_in_native, id=408]
0x03576828 JavaThread "httpWorkerThread-8181-1" daemon [_thread_blocked, id=1964]
0x0356ee10 JavaThread "httpWorkerThread-8181-0" daemon [_thread_blocked, id=3476]
0x00c29278 JavaThread "SelectorThread-8181" [_thread_in_native, id=3512]
0x03acb208 JavaThread "httpWorkerThread-8080-1" daemon [_thread_blocked, id=3472]
=>0x03b26e50 JavaThread "httpWorkerThread-8080-0" daemon [_thread_in_native, id=3884]
0x03bea780 JavaThread "SelectorThread-8080" [_thread_in_native, id=1500]
0x03606198 JavaThread "ContainerBackgroundProcessor[StandardEngine[com.sun.appserv]]" daemon [_thread_blocked, id=3788]
0x03b57620 JavaThread "SingleSignOnExpiration" daemon [_thread_blocked, id=3528]
0x03b5fb58 JavaThread "ContainerBackgroundProcessor[StandardEngine[com.sun.appserv].StandardHost[server].StandardContext[]]" daemon [_thread_blocked, id=3480]
0x03c03d58 JavaThread "ContainerBackgroundProcessor[StandardEngine[com.sun.appserv].StandardHost[server].StandardContext[newPalmService]]" daemon [_thread_blocked, id=3524]
0x03629bf0 JavaThread "ContainerBackgroundProcessor[StandardEngine[com.sun.appserv].StandardHost[server].StandardContext[palmSecure_ws]]" daemon [_thread_blocked, id=3560]
0x03acbee8 JavaThread "SingleSignOnExpiration" daemon [_thread_blocked, id=2308]
0x0374f418 JavaThread "ContainerBackgroundProcessor[StandardEngine[com.sun.appserv].StandardHost[__asadmin].StandardContext[]]" daemon [_thread_blocked, id=2708]
0x03601a88 JavaThread "ContainerBackgroundProcessor[StandardEngine[com.sun.appserv].StandardHost[__asadmin].StandardContext[web1]]" daemon [_thread_blocked, id=2284]
0x03b4e748 JavaThread "ContainerBackgroundProcessor[StandardEngine[com.sun.appserv].StandardHost[__asadmin].StandardContext[asadmin]]" daemon [_thread_blocked, id=680]
0x037e4ac8 JavaThread "Timer-3" [_thread_blocked, id=2100]
0x03a97b08 JavaThread "RMI RenewClean-[192.168.10.19:1464]" daemon [_thread_blocked, id=2080]
0x037a7f38 JavaThread "RMI TCP Accept-0" daemon [_thread_in_native, id=1580]
0x03a4a050 JavaThread "RMI TCP Accept-8686" daemon [_thread_in_native, id=1316]
0x0379ccd0 JavaThread "Thread-15" [_thread_blocked, id=316]
0x03771d20 JavaThread "Thread-14" [_thread_blocked, id=228]
0x0376bcf0 JavaThread "Thread-13" [_thread_blocked, id=436]
0x0373d2a8 JavaThread "RMI LeaseChecker" daemon [_thread_blocked, id=904]
0x0373aa68 JavaThread "RMI RenewClean-[192.168.10.19:1429,com.sun.enterprise.admin.server.core.channel.LocalRMIClientSocketFactory@ac4d3b]" daemon [_thread_blocked, id=2320]
0x00c66dd0 JavaThread "Timer-2" daemon [_thread_blocked, id=1512]
0x038e3350 JavaThread "Timer-1" [_thread_blocked, id=2272]
0x03a4ac60 JavaThread "Thread-10" [_thread_in_native, id=4052]
0x03a6fc88 JavaThread "Thread-8" [_thread_in_native, id=1052]
0x03a43818 JavaThread "Thread-7" [_thread_in_native, id=2600]
0x03a1e808 JavaThread "Thread-6" [_thread_in_native, id=1648]
0x03a1ac20 JavaThread "GC Daemon" daemon [_thread_blocked, id=4084]
0x03a52e18 JavaThread "RMI Reaper" [_thread_blocked, id=144]
0x03a52c30 JavaThread "Timer-0" daemon [_thread_blocked, id=208]
0x03a3d730 JavaThread "RMI TCP Accept-0" daemon [_thread_in_native, id=2044]
0x00c17020 JavaThread "Low Memory Detector" daemon [_thread_blocked, id=3456]
0x00c15bf0 JavaThread "CompilerThread0" daemon [_thread_blocked, id=4064]
0x00c14ed8 JavaThread "Signal Dispatcher" daemon [_thread_blocked, id=4060]
0x00c0fd90 JavaThread "Finalizer" daemon [_thread_blocked, id=4044]
0x00c0e8c0 JavaThread "Reference Handler" daemon [_thread_blocked, id=2436]
0x0032df88 JavaThread "main" [_thread_blocked, id=1532]
Other Threads:
0x00bdc778 VMThread [id=4028]
0x00c31a20 WatcherThread [id=4068]
VM state:not at safepoint (normal execution)
VM Mutex/Monitor currently owned by a thread: None
Heap
def new generation total 11712K, used 4051K [0x06a70000, 0x07720000, 0x11510000)
eden space 10432K, 27% used [0x06a70000, 0x06d435b0, 0x074a0000)
from space 1280K, 90% used [0x075e0000, 0x077017d8, 0x07720000)
to space 1280K, 0% used [0x074a0000, 0x074a0000, 0x075e0000)
tenured generation total 25784K, used 15468K [0x11510000, 0x12e3e000, 0x26a70000)
the space 25784K, 59% used [0x11510000, 0x1242b290, 0x1242b400, 0x12e3e000)
compacting perm gen total 26880K, used 26785K [0x26a70000, 0x284b0000, 0x2aa70000)
the space 26880K, 99% used [0x26a70000, 0x28498618, 0x28498800, 0x284b0000)
ro space 8192K, 67% used [0x2aa70000, 0x2afcd9f8, 0x2afcda00, 0x2b270000)
rw space 12288K, 46% used [0x2b270000, 0x2b813808, 0x2b813a00, 0x2be70000)
Dynamic libraries:
0x00400000 - 0x00406000      D:\Sun\AppServer\lib\appserv.exe
0x7c900000 - 0x7c9b0000      C:\WINDOWS\system32\ntdll.dll
0x7c800000 - 0x7c8f4000      C:\WINDOWS\system32\kernel32.dll
0x77c10000 - 0x77c68000      C:\WINDOWS\system32\MSVCRT.dll
0x6d730000 - 0x6d8c7000      C:\Program Files\Java\jdk1.5.0_07\jre\bin\client\jvm.dll
0x77d40000 - 0x77dd0000      C:\WINDOWS\system32\USER32.dll
0x77f10000 - 0x77f56000      C:\WINDOWS\system32\GDI32.dll
0x77dd0000 - 0x77e6b000      C:\WINDOWS\system32\ADVAPI32.dll
0x77e70000 - 0x77f01000      C:\WINDOWS\system32\RPCRT4.dll
0x76b40000 - 0x76b6d000      C:\WINDOWS\system32\WINMM.dll
0x6d2f0000 - 0x6d2f8000      C:\Program Files\Java\jdk1.5.0_07\jre\bin\hpi.dll
0x76bf0000 - 0x76bfb000      C:\WINDOWS\system32\PSAPI.DLL
0x00a10000 - 0x00a27000      C:\Program Files\Common Files\Logishrd\LVMVFM\LVPrcInj.dll
0x6d700000 - 0x6d70c000      C:\Program Files\Java\jdk1.5.0_07\jre\bin\verify.dll
0x6d370000 - 0x6d38d000      C:\Program Files\Java\jdk1.5.0_07\jre\bin\java.dll
0x6d720000 - 0x6d72f000      C:\Program Files\Java\jdk1.5.0_07\jre\bin\zip.dll
0x6d530000 - 0x6d543000      C:\Program Files\Java\jdk1.5.0_07\jre\bin\net.dll
0x71ab0000 - 0x71ac7000      C:\WINDOWS\system32\WS2_32.dll
0x71aa0000 - 0x71aa8000      C:\WINDOWS\system32\WS2HELP.dll
0x71a50000 - 0x71a8f000      C:\WINDOWS\System32\mswsock.dll
0x76f20000 - 0x76f47000      C:\WINDOWS\system32\DNSAPI.dll
0x76fb0000 - 0x76fb8000      C:\WINDOWS\System32\winrnr.dll
0x76f60000 - 0x76f8c000      C:\WINDOWS\system32\WLDAP32.dll
0x76fc0000 - 0x76fc6000      C:\WINDOWS\system32\rasadhlp.dll
0x04220000 - 0x04248000      C:\WINDOWS\system32\rsaenh.dll
0x769c0000 - 0x76a73000      C:\WINDOWS\system32\USERENV.dll
0x5b860000 - 0x5b8b4000      C:\WINDOWS\system32\netapi32.dll
0x6d550000 - 0x6d559000      C:\Program Files\Java\jdk1.5.0_07\jre\bin\nio.dll
0x662b0000 - 0x66308000      C:\WINDOWS\system32\hnetcfg.dll
0x71a90000 - 0x71a98000      C:\WINDOWS\System32\wshtcpip.dll
0x6d520000 - 0x6d528000      C:\Program Files\Java\jdk1.5.0_07\jre\bin\management.dll
0x6d670000 - 0x6d676000      C:\Program Files\Java\jdk1.5.0_07\jre\bin\rmi.dll
0x6d070000 - 0x6d1d7000      C:\Program Files\Java\jdk1.5.0_07\jre\bin\awt.dll
0x73000000 - 0x73026000      C:\WINDOWS\system32\WINSPOOL.DRV
0x76390000 - 0x763ad000      C:\WINDOWS\system32\IMM32.dll
0x774e0000 - 0x7761c000      C:\WINDOWS\system32\ole32.dll
0x73760000 - 0x737a9000      C:\WINDOWS\system32\ddraw.dll
0x73bc0000 - 0x73bc6000      C:\WINDOWS\system32\DCIMAN32.dll
0x73940000 - 0x73a10000      C:\WINDOWS\system32\D3DIM700.DLL
0x6d2b0000 - 0x6d2ef000      C:\Program Files\Java\jdk1.5.0_07\jre\bin\fontmanager.dll
0x7c9c0000 - 0x7d1d4000      C:\WINDOWS\system32\shell32.dll
0x77f60000 - 0x77fd6000      C:\WINDOWS\system32\SHLWAPI.dll
0x773d0000 - 0x774d2000      C:\WINDOWS\WinSxS\x86_Microsoft.Windows.Common-Controls_6595b64144ccf1df_6.0.2600.2180_x-ww_a84f1ff9\comctl32.dll
0x5d090000 - 0x5d127000      C:\WINDOWS\system32\comctl32.dll
0x05290000 - 0x0529a000      C:\WINDOWS\system32\PvsApiJv.dll
0x052a0000 - 0x052ac000      D:\Java Project\PalmSecure\src\dll\PvFw.dll
0x052b0000 - 0x052dc000      D:\Java Project\PalmSecure\src\dll\F3BC1ENG.DLL
0x052e0000 - 0x0531f000      D:\Java Project\PalmSecure\src\dll\F3BC4CAP.DLL
0x05320000 - 0x05344000      D:\Java Project\PalmSecure\src\dll\F3BC4COM.DLL
0x73dd0000 - 0x73ece000      C:\WINDOWS\system32\MFC42.DLL
0x05c50000 - 0x05cf7000      D:\Java Project\PalmSecure\src\dll\F3BC4MAT.DLL
VM Arguments:
jvm_args: -client -Xmx512m -XX:NewRatio=2 -Dcom.sun.aas.defaultLogFile=D:/Sun/AppServer/domains/domain1/logs/server.log -Djava.endorsed.dirs=D:/Sun/AppServer/lib/endorsed -Djava.security.policy=D:/Sun/AppServer/domains/domain1/config/server.policy -Djava.security.auth.login.config=D:/Sun/AppServer/domains/domain1/config/login.conf -Dsun.rmi.dgc.server.gcInterval=3600000 -Dsun.rmi.dgc.client.gcInterval=3600000 -Djavax.net.ssl.keyStore=D:/Sun/AppServer/domains/domain1/config/keystore.jks -Djavax.net.ssl.trustStore=D:/Sun/AppServer/domains/domain1/config/cacerts.jks -Djava.ext.dirs=C:/Program Files/Java/jdk1.5.0_07/jre/lib/ext;D:/Sun/AppServer/domains/domain1/lib/ext;D:/Sun/AppServer/javadb/lib -Djdbc.drivers=org.apache.derby.jdbc.ClientDriver -Djavax.management.builder.initial=com.sun.enterprise.admin.server.core.jmx.AppServerMBeanServerBuilder -Dcom.sun.enterprise.config.config_environment_factory_class=com.sun.enterprise.config.serverbeans.AppserverConfigEnvironmentFactory -Dcom.sun.enterprise.taglibs=appserv-jstl.jar,jsf-impl.jar -Dcom.sun.enterprise.taglisteners=jsf-impl.jar -Dcom.sun.aas.classloader.optionalOverrideableChain=appserv-ws.jar,commons-logging.jar,commons-launcher.jar -Dcom.sun.aas.classloader.appserverChainJars=admin-cli.jar,admin-cli-ee.jar,dbschema.jar,j2ee-svc.jar -Dcom.sun.aas.classloader.serverClassPath.ee=%HADB_HOME%/lib/hadbjdbc4.jar,D:/Sun/AppServer/lib/SUNWjdmk/5.1/lib/jdmkrt.jar,%HADB_HOME%/lib/dbstate.jar,%HADB_HOME%/lib/hadbm.jar,%HADB_HOME%/lib/hadbmgt.jar,D:/Sun/AppServer/lib/SUNWmfwk/lib/mfwk_instrum_tk.jar -Dcom.sun.aas.configName=server-config -Ddomain.name=domain1 -Djmx.invoke.getters=true -Dcom.sun.aas.promptForIdentity=true -Dcom.sun.aas.classloader.optionalOverrideableChain.ee= -Dcom.sun.aas.instanceRoot=D:/Sun/AppServer/domains/domain1 -Dcom.sun.aas.domainName=domain1 -Dcom.sun.aas.classloader.sharedChainJars=javaee.jar,C:/Program Files/Java/jdk1.5.0_07/lib/tools.jar,install/applications/jmsra/imqjmsra.jar,commons-launcher.jar
java_command: <unknown>
Launcher Type: generic
Environment Variables:
JAVA_HOME=C:\Program Files\Java\jdk1.5.0_07
CLASSPATH=C:\PROGRA~1\JMF21~1.1E\lib\sound.jar;C:\PROGRA~1\JMF21~1.1E\lib\jmf.jar;C:\PROGRA~1\JMF21~1.1E\lib;C:\Program Files\Java\jdk1.5.0_07\jre\lib;.
PATH=C:/Program Files/Java/jdk1.5.0_07\jre\bin\client;D:\Sun\AppServer\lib;D:\Sun\AppServer\lib;C:\Program Files\Java\jdk1.5.0_07\bin;.;C:\WINDOWS\system32;C:\WINDOWS;D:\Sun\AppServer\lib;D:\Sun\AppServer\bin;D:\Sun\AppServer\lib;D:\Sun\AppServer\bin;C:\Sun\share\lib;C:\Sun\share\bin;C:\PROGRA~1\Java\JDK15~2.0_0\bin;C:\Sun\MessageQueue\lib;C:\Sun\MessageQueue\bin;c:\oracledb\product\10.2.0\db_2\bin;D:\oracle\product\10.2.0\db_1\bin;c:\oracle\ora92\bin;C:\Program Files\Oracle\jre\1.3.1\bin;C:\Program Files\Oracle\jre\1.1.8\bin;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\wamp\php;C:\wamp\Apache\GnuWin32\bin;d:\Program Files\Microsoft SQL Server\90\Tools\binn\;D:\Java Project\PalmSecure\src\dll;D:\Java Project\PalmSecure\src\Lib;.;D:\Sun\AppServer\bin;;C:\Sun\AppServer;C:\Program Files\Java\jdk1.5.0_07\bin;C:\Program Files\Cvsnt;C:\Program Files\CVSNT\;D:\Java Project\PalmSecure\src\dll;D:\Java Project\PalmSecure\src\Lib;
USERNAME=subbu.chandrasekaran
OS=Windows_NT
PROCESSOR_IDENTIFIER=x86 Family 15 Model 44 Stepping 2, AuthenticAMD
--------------- S Y S T E M ---------------
OS: Windows XP Build 2600 Service Pack 2
CPU:total 1 family 47, cmov, cx8, fxsr, mmx, sse, sse2
Memory: 4k page, physical 457904k(42684k free), swap 3464136k(2905608k free)
vm_info: Java HotSpot(TM) Client VM (1.5.0_07-b03) for windows-x86, built on May 3 2006 01:04:38 by "java_re" with MS VC++ 6.0
what is the reason for this one....?
In my case, whenever the user has clicked the Identify button then the native method Identify should be called. That time it's working fine.
But once the user has clicked the Enroll button, then first the Identify native method should be called, based upon the result, the enroll() native method will be called. I am getting the error whenever i am clicking the Enroll button.
while clicking the Identify button i didn't get any such error....
What would be the reason?
someone pls clear my doubt.
--Subbu

You have a bug in your C code, and are attempting to access memory location 0.
Look for an unitialized pointer.

Unable to call a native method

Hi All,
I am trying to call a native method tapi3Init from tapi3.dll present in Windows\System32 folder. But I get an error as below.
Exception in thread "Main Thread" java.lang.UnsatisfiedLinkError: DLLCall.tapi3Init
at DLLCall.main(DLLCall.java:25)
I have verified my java.library.path and it has the path in it. I have cross verified by typing a wrong dll name and that gave a relevant error. So, please let me know what is going wrong?
Also, is it not possible to call a native method from a dll which is not formed by using the javah header file?
Thanks.

native method tapi3Init from tapi3.dllSo that would be your JNI method.
Exception in thread "Main Thread" java.lang.UnsatisfiedLinkError: DLLCall.tapi3Init And you are not calling it. Standard reasons apply.
- library not loaded
- Signatures are different.

Calling a native library from Java

Hello,
I'm trying to call a native method (windows dll) from a web service implemented in Java. I've confirmed that the class I've created to call the native method works when used outside of my web service (ie. in a standard Java application). However, when I try to use the class in the web service, an exception is thrown when
System.loadLibrary("MyLibrary");
is executed. The exception thrown is:
InvocationTargetException
JAXRPCSERVLET28: Missing port information
Does any one have any suggestions as to what might be causing this error?
Thanks

There are basically 3 steps to calling a native method from your Java code.
1. Create a C/C++ stub function that will translate between your Java call and the native C method.
2. Create the dll that exports the stub function.
3. Invoke the System.loadLibrary("myDllName") method.
Here's what I did to learn how to use the JNI.
I first created the class that would be calling the dll:
public class CallDll
/** Creates a new instance of CallDll */
public CallDll()
static
//LVtoJava is my dll name.
System.loadLibrary("LVtoJava");
//AddDll is the name of the function I'm exporting from my Dll
//It does not have to be static
public native static double AddDll(int func, double x, double y);
I then used the javah utility in the jdk/bin directory to create the C stub header file. Once you have the generated stub header file, you can create an implementation file, and compile it into a dll.
//My C++ stub, generated by javah utility
/* DO NOT EDIT THIS FILE - it is machine generated */
#include <jni.h>
/* Header for class LabViewDll_CallDll */
#ifndef IncludedLabViewDll_CallDll
#define IncludedLabViewDll_CallDll
#ifdef __cplusplus
extern "C" {
#endif
* Class: LabViewDll_CallDll
* Method: AddDll
* Signature: (IDD)D
JNIEXPORT jdouble JNICALL Java_LabViewDll_CallDll_AddDll
(JNIEnv *, jclass, jint, jdouble, jdouble);
#ifdef __cplusplus
#endif
#endif
You may want to note the stub function's signature and how it decorates the function name that you created from your Java class. Do not modify it, as the format is required by the JNI. The javah utility appends the fully qualified package name and the word Java, separated by underscores, to your original function name. You do not need to change the name in your Java class.
All the other special key words in the function's signature are defined in the jni.h or the jni_md.h (if your using windows).
You may want to refer to the JNI documention on Sun's website. The book I learned out of is the Core Java Volume 2, published by Sun Microsystems Press. It goes through the details of invoking your first native function and I've found it to be a good reference.
Hope this helps,
PS. I seemed to have found the issue with calling my dll from a web service. My dll is actually calling another dll and that seems to be the source of my problems. When I removed the call to the 2nd dll, everything worked fine. So now I need to figure out why the 2nd dll call is an issue.
Any suggestions?

Accessing a native method from within a packaged class

I have seen some very useful information from RPaul. However, I can not quite get it to work.
I have a class "JNIGetUserId" that is in a package "com.services.localoptions". I am trying to call a native method from a dll. it works fine at the default package level. But not in the package. I have tried adding the "_" between each level of the directory in the h and c++ files. I also found that doing a javah at the top of the package structure it includes some information in the h file. A "_0005" shows up between each level.
This is on Windows XP. I am also using VisualAge for Java. I also am using JDK 1.3.1.
The source files:
package com.services.localoptions;
* This class provides the JNI Interface to call the
* AD User Maintainence routines.
* These routines are stored in the JNIGetUserIdLibrary.dll.
* The routines are:
* <ul>
* <li>getUser - returns a string containing the User Id
* <eul>
* @author: Ray Rowehl
* @date (10/15/2003 10:30:59 AM)
public class JNIGetUserId
     // Load the library
     static
     try
          System.out.println("loading dll");
     System.loadLibrary("JNIGetUserIdLibrary");
     System.out.println("loaded dll");
     catch (UnsatisfiedLinkError ue)
          System.out.println("Link Error");
* native C++ method to call getUserId routine
public native String getUser() throws Exception;
* This method allows us to test standalone..
* Creation date: (10/16/2003 2:08:58 PM)
* @param args java.lang.String[]
public static void main(String[] args)
     try
          System.out.println("Trying method 3");
          JNIGetUserId lGUD = new JNIGetUserId();
          System.out.println(lGUD.getUser());
     catch (Exception e)
          System.out.println("Got an exception " + e);
          e.printStackTrace();
/* DO NOT EDIT THIS FILE - it is machine generated */
#include <jni.h>
/* Header for class JNIGetUserId */
#ifndef IncludedJNIGetUserId
#define IncludedJNIGetUserId
#ifdef __cplusplus
extern "C" {
#endif
* Class: JNIGetUserId
* Method: getUser
* Signature: ()Ljava/lang/String;
JNIEXPORT jstring JNICALL Java_com_localoptions_JNIGetUserId_getUser
(JNIEnv *, jobject);
#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 )
     // set up constant user id for testing return
     char* userid = "RROWEHLP";
     // return userid to caller
     return env->NewStringUTF( userid );
// returns a string back to Java for flat structure
JNIEXPORT jstring JNICALL Java_JNIGetUserId_getUser
( JNIEnv * env1, jobject thisObject1 )
     // set up constant user id for testing return
     char* userid1 = "RROWEHL1";
     // return userid to caller
     return env1->NewStringUTF( userid1 );
}

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.

Calling UNIX shell script from ODI package?

Hi,
How Can we call UNIX shell script from ODI package?
I have a ftp_ss.sh script which which ftps a file from remote server to local server, archives the last file and renames new file to the standard (ie file data store)name.
I want to run the above script and interfaces from a package.
Any help is greately appreciated.
Thanks,
RD

In the package window, put "OS Command" from the toolbox.
Provide the command parameters to this tool in form of "/path/to/script/ftp_ss.sh"

Can we call a static method without mentioning the class name

public class Stuff {
     public static final int MY_CONSTANT = 5;
     public static int doStuff(int x){ return (x++)*x;}
import xcom.Stuff.*;
import java.lang.System.out;
class User {
   public static void main(String[] args){
   new User().go();
   void go(){out.println(doStuff(MY_CONSTANT));}
}Will the above code compile?
can be call a static method without mentioning the class name?

Yes, why do it simply?
pksingh79 wrote:
call a static method without mentioning the class name?For a given value of "without mentioning the class name".
    public static Object invokeStaticMethod(String className, String methodName, Object[] args) throws Exception {
        Class<?>[] types = new Class<?>[args.length];
        for(int i=0;i<args.length;++i) types[i] = args==null?Object.class:args[i].getClass();
return Class.forName(className).getDeclaredMethod(methodName,types).invoke(null,args);

Calling native methods in a package

Hi!
We have a problem when calling native methods in a class which is in a package. As you can see from the code below we have a class making an instance of a class<testBando> which makes a instance of another class<Bando> which contains the native methods. When running the program we get the error:
Exception in thread "main" java.lang.UnsatisfiedLinkError: initialize
at test2.Bando.initialize(Native Method)
at test.testBando.<init>(testBando.java:10)
at Main.main(Main.java:5)
When we take the class that calls the native methods out of any package every thing works fine! Can you not call native methods inside a package or what are we doing wrong?
// testBando.java
package test;
import test2.*;
public class testBando {
Bando b;
public testBando() {
     b = new Bando();
     b.initialize();
// Bando.java
package test2;
public class Bando {
public native void initialize();
static {
     System.loadLibrary("bando");
// Main.java
import test.*;
public class Main {
public static void main(String[] args) {
     new testBando();

I suspect that your problem is that you have not
regenerated the signature when you placed the native
method's object in a package. Or same result but different sourc:
-package name was changed and it wasn't regen'd
-javah was run incorrectly (which gens the signatures with no package name.)

Can we call a BO method directly

Hi all,
Can we call a BO method explicitly in a program .
e.g. can i call the method approve of the FORMABSENC BO.
Regards,
Sateesh.

Of course you can. You just need to include the macros include so you can create objects and call the methods. If you are not familiar with the different macros, just browse through <CNTN01> to find what you need. There is documentation in the code.
You will probably need at least the following four macros
SWC_CREATE_OBJECT to create an object from its type and key.
SWC_SET_ELEMENT one or more times to fill the container with appropriate parameters.
SWC_CALL_METHOD to call the method.
SWC_GET_ELEMENT one or more times to retrieve returned parameters.
Note that SWC_SET_ELEMENT does not work for table parametes, use SWC_SET_TABLE instead.

Why I can't call my native method from my package?

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