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Setting classpath and java.lang.ClassNotFoundException

Posted on 2006-06-24
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Last Modified: 2013-11-23
Hi,

I am trying to use cloudscape db and after setting classpath, I still get this error.

java.lang.ClassNotFoundException: COM.cloudscape.core.JDBCDriver
      at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
      at java.security.AccessController.doPrivileged(Native Method)
      at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
      at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
      at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:268)
      at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
      at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
      at java.lang.Class.forName0(Native Method)
      at java.lang.Class.forName(Class.java:164)
      at StudentInfo.getConnect(StudentInfo.java:86)
      at StudentInfo.main(StudentInfo.java:109)

++++++++++++++
This is my classpath:

>echo %classpath%
.;C:\jakarta-tomcat-5.5.4\common\lib\servlet-api.jar; C:\jakarta-tomcat-5.5.4\co
mmon\lib\jsp-api.jar; C:\Sun\AppServer\lib\j2ee.jar; C:\jakarta-tomcat-5.5.4\web
apps\~dkim18\WEB-INF\classes.;C:\proj5\xerces.jar;C:\bea81\weblogic81\server\lib
\weblogic.jar;C:\cloudscape36\lib\cloudscape.jar;C:\cloudscape36\lib\client.jar
+++++++++++++
This is my code:

try {
                     
          String jdbcDriver = "COM.cloudscape.core.JDBCDriver";
                String dbURL = "jdbc:cloudscape:TextDB";
                String username = "username";
                      String passwd = "password";
      
                Class.forName(jdbcDriver).newInstance();      
           
                 conn = DriverManager.getConnection(dbURL, username, passwd);
               }
++++++++++++
Any clue?

thanks!
0
Comment
Question by:dkim18
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7 Comments
 
LVL 86

Expert Comment

by:CEHJ
ID: 16976343
Make sure

COM.cloudscape.core.JDBCDriver

is prefectly correct (case too)
0
 

Author Comment

by:dkim18
ID: 16976450
I believe it is correct.

try {
                   
         String jdbcDriver = "COM.cloudscape.core.JDBCDriver";
...
...
...
0
 
LVL 86

Expert Comment

by:CEHJ
ID: 16976453
Can you post the output of

jar tf C:\cloudscape36\lib\cloudscape.jar

?
0
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More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

 

Author Comment

by:dkim18
ID: 16976463
COM/cloudscape/aggregates/AggregateDefinition.class
COM/cloudscape/aggregates/Aggregator.class
COM/cloudscape/authentication/Interface/AuthenticationException.clas
COM/cloudscape/authentication/Interface/AuthenticationScheme.class
COM/cloudscape/authentication/util/SimpleAuthenticationScheme.class
COM/cloudscape/core/AbstractDataSource.class
COM/cloudscape/core/BaseConnectionHandle.class
COM/cloudscape/core/BasicDataSource.class
COM/cloudscape/core/BootStrap.class
COM/cloudscape/core/CloudscapeServer.class
COM/cloudscape/core/CloudscapeServerTie.class
COM/cloudscape/core/DataSourceFactory.class
COM/cloudscape/core/GetUniqueIDInterface.class
COM/cloudscape/core/JDBCBoot.class
COM/cloudscape/core/JDBCDriver.class
COM/cloudscape/core/LocalConnectionPoolDataSource.class
COM/cloudscape/core/LocalPooledConnection.class
COM/cloudscape/core/modules.properties
COM/cloudscape/core/MonitorBoot.class
COM/cloudscape/core/MonitorLog.class
COM/cloudscape/core/PrintStreamMonitorLog.class
COM/cloudscape/core/RemoteXaDataSource.class
COM/cloudscape/core/RmiJdbcDriver.class
COM/cloudscape/core/WebLogicCloudscapeServerTie.class
COM/cloudscape/core/XaDataSource.class
COM/cloudscape/database/ConnectionInfo.class
COM/cloudscape/database/ConsistencyChecker.class
COM/cloudscape/database/Database.class
COM/cloudscape/database/Factory.class
COM/cloudscape/database/JavaSQLException.class
COM/cloudscape/database/JBMSException.class
COM/cloudscape/database/OptimizerTrace.class
COM/cloudscape/database/PropertyInfo.class
COM/cloudscape/database/TriggerExecutionContext.class
COM/cloudscape/database/UserUtility.class
COM/cloudscape/info/DBMS.properties
COM/cloudscape/info/license.properties
COM/cloudscape/info/LocaleNames.class
COM/cloudscape/info/ProductGenusNames.class
COM/cloudscape/info/ProductVersionHolder.class
COM/cloudscape/info/ProductVersionHolderJava2.class
COM/cloudscape/info/PropertyNames.class
COM/cloudscape/info/sysinfo.properties
COM/cloudscape/system/System.class
COM/cloudscape/system/UUIDFactory.class
COM/cloudscape/tools/dbclasses.class
COM/cloudscape/tools/FileExport.class
COM/cloudscape/tools/FileImport.class
COM/cloudscape/tools/ImportExportSQLException.class
COM/cloudscape/tools/sysinfo.class
COM/cloudscape/types/AliasInfo.class
COM/cloudscape/types/DatabaseInstant.class
COM/cloudscape/types/DefaultInfo.class
COM/cloudscape/types/DependableFinder.class
COM/cloudscape/types/ErrorInfo.class
COM/cloudscape/types/IndexDescriptor.class
COM/cloudscape/types/Inspectable.class
COM/cloudscape/types/JBMSExceptionSeverity.class
COM/cloudscape/types/ReferencedColumnsDescriptor.clas
COM/cloudscape/types/RunTimeStatistics.class
COM/cloudscape/types/TypeDescriptor.class
COM/cloudscape/types/TypeFactory.class
COM/cloudscape/types/UUID.class
COM/cloudscape/util/BitUtil.class
COM/cloudscape/util/DBClassLoad.class
COM/cloudscape/util/DriverUtil.class
COM/cloudscape/util/KeyGen.class
COM/cloudscape/vti/CloudscapeLogReader.class
COM/cloudscape/vti/ConglomerateNumToContainerId.class
COM/cloudscape/vti/ConglomerateNumToContainerIdHelper
COM/cloudscape/vti/ConglomerateNumToContainerIdMetaDa
COM/cloudscape/vti/ConglomInfo.class
COM/cloudscape/vti/ContainerIdToConglomerateNum.class
COM/cloudscape/vti/ContainerIdToConglomerateNumHelper
COM/cloudscape/vti/ContainerIdToConglomerateNumMetaDa
COM/cloudscape/vti/ErrorMessages.class
COM/cloudscape/vti/ErrorMessagesMetaData.class
COM/cloudscape/vti/ExternalQuery.class
COM/cloudscape/vti/GetProcColsMetaData.class
COM/cloudscape/vti/GetProcedureColumns.class
COM/cloudscape/vti/LockTable.class
COM/cloudscape/vti/LockTableMetaData.class
COM/cloudscape/vti/LogReaderMetaData.class
COM/cloudscape/vti/SpaceTable.class
COM/cloudscape/vti/SpaceTableMetaData.class
COM/cloudscape/vti/StatementDuration.class
COM/cloudscape/vti/StatementDurationMetaData.class
COM/cloudscape/vti/TransactionTable.class
COM/cloudscape/vti/TransactionTableMetaData.class
COM/cloudscape/vti/TriggerNewTransitionRows.class
COM/cloudscape/vti/TriggerOldTransitionRows.class
COM/cloudscape/vti/UpdatableVTITemplate.class
COM/cloudscape/vti/VTICosting.class
COM/cloudscape/vti/VTIEnvironment.class
COM/cloudscape/vti/VTIException.class
COM/cloudscape/vti/VTIMetaDataTemplate.class
COM/cloudscape/vti/VTITemplate.class
COM/cloudscape/vti20/UpdatableVTITemplate.class
COM/cloudscape/vti20/VTIMetaDataTemplate.class
COM/cloudscape/vti20/VTITemplate.class
COM/objectspace/jgl/Allocator.class
COM/objectspace/jgl/ArrayAdapter.class
COM/objectspace/jgl/BidirectionalIterator.class
COM/objectspace/jgl/BinaryFunction.class
COM/objectspace/jgl/BinaryPredicate.class
COM/objectspace/jgl/ArrayAdapter.class
COM/objectspace/jgl/BidirectionalIterator.class
COM/objectspace/jgl/BinaryFunction.class
COM/objectspace/jgl/BinaryPredicate.class
COM/objectspace/jgl/Comparing.class
COM/objectspace/jgl/Container.class
COM/objectspace/jgl/Counting.class
COM/objectspace/jgl/DList$DListNode.class
COM/objectspace/jgl/DList.class
COM/objectspace/jgl/DListIterator.class
COM/objectspace/jgl/EqualTo.class
COM/objectspace/jgl/Finding.class
COM/objectspace/jgl/ForwardIterator.class
COM/objectspace/jgl/HashComparator.class
COM/objectspace/jgl/Hashing.class
COM/objectspace/jgl/InputIterator.class
COM/objectspace/jgl/InsertIterator.class
COM/objectspace/jgl/IntArray.class
COM/objectspace/jgl/IntIterator.class
COM/objectspace/jgl/InvalidOperationException.class
COM/objectspace/jgl/MinusNumber.class
COM/objectspace/jgl/NumberHelper.class
COM/objectspace/jgl/OutputIterator.class
COM/objectspace/jgl/Pair.class
COM/objectspace/jgl/PlusNumber.class
COM/objectspace/jgl/Printing.class
COM/objectspace/jgl/Queue.class
COM/objectspace/jgl/RandomAccessIterator.class
COM/objectspace/jgl/Replacing.class
COM/objectspace/jgl/Sequence.class
COM/objectspace/jgl/SList$SListNode.class
COM/objectspace/jgl/SList.class
COM/objectspace/jgl/SListIterator.class
COM/objectspace/jgl/Sorting.class
COM/objectspace/jgl/UnaryPredicate.class
c8e/a/b.class
c8e/a/c.class
c8e/a/d.class
c8e/aa/a.class
c8e/aa/b.class
c8e/aa/c.class
c8e/ab/a.class
c8e/ab/b.class
c8e/ab/c.class
c8e/ab/d.class
c8e/ab/e.class
c8e/ab/f.class
c8e/ab/g.class
c8e/ab/h.class
c8e/ab/i.class
c8e/ab/j.class
c8e/ab/k.class
..
...
...
c8e/z/metadata.properties
c8e/z/n.class
c8e/z/o.class
c8e/z/p.class
c8e/z/q.class
c8e/z/r.class
c8e/z/s.class
0
 
LVL 86

Accepted Solution

by:
CEHJ earned 300 total points
ID: 16976465
That's in order. Please post the command you're using to run
0
 

Author Comment

by:dkim18
ID: 16976502
the problem has been solved. i was running this app by using eclipse and didn't set classpath. my bad...
0
 
LVL 86

Expert Comment

by:CEHJ
ID: 16976507
:-)
0

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More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

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