Solved

Setting classpath and java.lang.ClassNotFoundException

Posted on 2006-06-24
7
775 Views
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
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 4
  • 3
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
Revamp Your Training Process

Drastically shorten your training time with WalkMe's advanced online training solution that Guides your trainees to action.

 

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

Featured Post

Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Java contains several comparison operators (e.g., <, <=, >, >=, ==, !=) that allow you to compare primitive values. However, these operators cannot be used to compare the contents of objects. Interface Comparable is used to allow objects of a cl…
Java Flight Recorder and Java Mission Control together create a complete tool chain to continuously collect low level and detailed runtime information enabling after-the-fact incident analysis. Java Flight Recorder is a profiling and event collectio…
This tutorial covers a step-by-step guide to install VisualVM launcher in eclipse.
This theoretical tutorial explains exceptions, reasons for exceptions, different categories of exception and exception hierarchy.
Suggested Courses

739 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question