java.lang.ClassNotFoundException: SecuGen.FDxSDKPro.jni.JSGFPLib

Question

I want to build a class library in java . That means I want to develop a jar file which will be used in another java project .

In this class library project , I have written a class named FingerMatching . I am using JSGFPLib clas from FDxSDKPro.jar in FingerMatching class . JSGFPLib class is located in SecuGen.FDxSDKPro.jni package.

In FingerMatching class , there are two methods . The prototype of that two methods are as follows :

 public boolean fingerPrintIndetify(byte[] fingerData, byte[][] fingerEnrollData) 
 boolean fingerprintVerify(byte[] regMin, byte[] regMin1)

After building this class project , I have got a jar . Let the name of this jar is "FingerMatching.jar" . I have imported this jar to another project . After running that project , I am getting this error .

11-Feb-2018 12:08:15.899 SEVERE [http-nio-8084-exec-77] org.apache.catalina.core.StandardWrapperValve.invoke Servlet.service() for servlet [FingerVerification] in context with path [/UFingerEnrollVerify] threw exception [Servlet execution threw an exception] with root cause
 java.lang.ClassNotFoundException: SecuGen.FDxSDKPro.jni.JSGFPLib
    at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1333)
    at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1167)
    at com.era.Fingerprint.FingerMatching.fingerprintVerify(FingerMatching.java:46)
    at com.era.Fingerprint.FingerMatching.fingerPrintIndetify(FingerMatching.java:31)
    at era.data.FingerPrintVerification.fingerVerfyFromTemplate(FingerPrintVerification.java:102)
    at era.servlet.FingerVerification.doPost(FingerVerification.java:172)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:648)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:393)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:217)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:142)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
    at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:518)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1091)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:673)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1500)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1456)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:745)

Why am I getting this error ? Please help me to solve this error .

Possible duplicate of [What causes and what are the differences between NoClassDefFoundError and ClassNotFoundException?](https://stackoverflow.com/questions/1457863/what-causes-and-what-are-the-differences-between-noclassdeffounderror-and-classn) — LaurentY, Feb 12 '18 at 13:27

miskender · Answer 1 · 2018-02-11T06:54:54.443

1

NoClassDefFoundError occurs when your project does not have required runtime dependecies in the classpath. Does your FingerMatching.jar includes everything from FDxSDKPro.jar. If it does not, you have to also import FDxSDKPro.jar to the newly created project.

edited Feb 11 '18 at 06:54

answered Feb 11 '18 at 06:40

miskender

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I have imported FDxSDKPro.jar in FingerMatching project . – Christopher Marlowe Feb 11 '18 at 08:34
@IccheGuri When you open `FingerMatching.jar` with 7zip (winrar or any other archive program), can you see content of `FDxSDKPro.jar` inside it. – miskender Feb 11 '18 at 08:42
No . I cant see content of FDxSDKPro.jar inside it – Christopher Marlowe Feb 11 '18 at 08:54
@IccheGuri Then you have to import FDxSDKPro.jar to your new project. – miskender Feb 11 '18 at 09:22
@SilverShroud i imported FDxSDKPro.jar and when i extract it i have all the content then also i got error when i am creating war file and call JSGFPLib sgfplib = new JSGFPLib(); – Bharti Ladumor Feb 21 '19 at 10:49

java.lang.ClassNotFoundException: SecuGen.FDxSDKPro.jni.JSGFPLib

1 Answers1