Class Not Found Exception - applet won't run anywhere outside of IDE
I have an applet that runs perfectly in the netbeans IDE, but won't run from command prompt (I'm using windows) or from a browser. I've been banging my head against the wall for a few days on this one. Here's the HTML I'm using:
<applet width="400" height="525" code="musicapplet.class" archive="crypticgraffiti.jar">
<param name="bgcolor" value="ffffff"> <param name="fontcolor" value="000000">
</param> </param> Your browser is not Java enabled. </applet>
Here is the structure of the jar file's contents:
META-INF/
META-INF/MANIFEST.MF
com/
com/crypticgraffiti/
com/crypticgraffiti/music/musicapplet
com/crypticgraffiti/music/GetNotes.class
com/crypticgraffiti/music/InstList.class
com/crypticgraffiti/music/Mode.class
com/crypticgraffiti/music/MusicCreator.class
com/crypticgraffiti/music/OctaveTransformer.class
com/crypticgraffiti/music/Phrase.class
musicapplet/MusicApplet$playerThread.class
musicapplet/MusicApplet.class
(Musicapplet.class is the main class)
When I attempt to run from command prompt, I get:
"Error: Could not find or load main class crypticgraffiti.MusicApplet"
When I attempt to load via html:
"basic: load: class musicapplet.class not found.
load: class musicapplet.class not found.
java.lang.ClassNotFoundException: musicapplet.class
at sun.plugin2.applet.Applet2ClassLoader.findClass(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass0(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadCode(Unknown Source)
at sun.plugin2.applet.Plugin2Manager.createApplet(Unknown Source)
at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Exception: java.lang.ClassNotFoundException: musicapplet.class
security: Accessing keys and certificate in Mozilla user profile: null"
I have tried every possible variation for the 'code' element of the applet tag (package.mainclass.class, mainclass, mainclass.class, etc). I have also tried compiling with JDK 1.6 and this didn't change anything. I've tried clearing out the cache of temporary files using the java control panel settings, and have verified that my browser can run other applets using JRE 6 and 7.
I've tried some different ways of distributing the applet, also: putting all the class files in the folder with the html file, putting the classes in a source folder in the same folder as the html file, and finally putting a jar in the same folder as the html file (which really seems the simplest).
Any help at all would be most appreciated! This applet is a very cool and original music creating app that draws heavily on the JFugue API. It's a shame that I can't get it online for people to play with!
Cryptic Graffiti wrote:
Here is the structure of the jar file's contents:
META-INF/
META-INF/MANIFEST.MF
com/
com/crypticgraffiti/
com/crypticgraffiti/music/musicapplet
com/crypticgraffiti/music/GetNotes.class
com/crypticgraffiti/music/InstList.class
com/crypticgraffiti/music/Mode.class
com/crypticgraffiti/music/MusicCreator.class
com/crypticgraffiti/music/OctaveTransformer.class
com/crypticgraffiti/music/Phrase.class
musicapplet/MusicApplet$playerThread.class
musicapplet/MusicApplet.class
(Musicapplet.class is the main class)
Please note that class names are case sensitive so "MusicApplet" is not same as "Musicapplet" or "musicapplet". Your applet tag should have fully qualified class name (without quotes) and should look like this:
<applet width=400 height=525 code=musicapplet.MusicApplet archive="crypticgraffiti.jar">
</applet>
The JAR should be in the same directory as your HTML file. While launching from command line, you can also check if your JAR file is getting included in classpath.
Thanks,
Nitin
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Class not Found Exception while running an EJB
I have created and published a EJB in Oracle 8i (in a particular
schema) by running the deployejb tool supplied. The ejb was
published successfully. On running the client program I get an
error saying that the mybeans's HomeHelper class cannot be
found. This error occurs when there is a lookup to the home
interface of the bean. The exception thrown says Reasons are
unknown. On checking the objects of type 'JAVA CLASS' I found
that the homeHelper class object had been created automatically
be the deploy process. What is the reason for the class not
found exception and what can I do to correct it. ?
The code for the beans is as given below :
Home Interface
package mituser ;
import javax.ejb.*;
import java.rmi.RemoteException;
public interface MITUserHome extends EJBHome {
public MITUser create()
throws CreateException, RemoteException;
Remote Interface
package mituser ;
import javax.ejb.EJBObject;
import java.rmi.RemoteException;
public interface MITUser extends EJBObject {
public int validateUserName (String username)
throws java.sql.SQLException, RemoteException;
public int validatePassword (String username, String password)
throws java.sql.SQLException, RemoteException;
public String validateSearchAccess (String username, String
password)
throws java.sql.SQLException, RemoteException;
Bean
package mituserServer ;
import java.sql.*;
import java.rmi.RemoteException;
import javax.ejb.*;
public class MITUserBean implements SessionBean {
SessionContext ctx;
public void ejbCreate() throws CreateException,
RemoteException {
public void ejbActivate() {
public void ejbPassivate() {
public void ejbRemove() {
public void setSessionContext(SessionContext ctx) {
this.ctx = ctx;
public int validateUserName (String username) throws
SQLException, RemoteException
int count = 0 ;
Connection conn =
new oracle.jdbc.driver.OracleDriver().defaultConnection ();
PreparedStatement ps =
conn.prepareStatement ("select count(username) from
useraccountinfo where username = ?");
try {
ps.setString (1, username);
ResultSet rset = ps.executeQuery ();
if (!rset.next ())
throw new RemoteException ("no registered user with User
Name " + username);
count = rset.getShort(1) ;
return count ;
} finally {
ps.close();
public int validatePassword (String username, String password)
throws SQLException, RemoteException
int count = 0 ;
Connection conn =
new oracle.jdbc.driver.OracleDriver().defaultConnection ();
PreparedStatement ps =
conn.prepareStatement ("select count(username) from
useraccountinfo where username = ? and password = ?");
try {
ps.setString (1, username);
ps.setString(2, password);
ResultSet rset = ps.executeQuery ();
if (!rset.next ())
throw new RemoteException ("Invalid Password ");
count = rset.getShort(1) ;
return count ;
} finally {
ps.close();
public String validateSearchAccess (String username, String
password) throws SQLException, RemoteException
String searchaccess = "" ;
Connection conn =
new oracle.jdbc.driver.OracleDriver().defaultConnection ();
PreparedStatement ps =
conn.prepareStatement ("select searchprofileaccess from
useraccountinfo where username = ? and password = ?");
try {
ps.setString (1, username);
ps.setString(2, password);
ResultSet rset = ps.executeQuery ();
if (!rset.next ())
throw new RemoteException ("Access Denied for " +
username );
searchaccess = rset.getString(1) ;
return searchaccess ;
} finally {
ps.close();
Client program
import mituser.MITUser;
import mituser.MITUserHome;
import oracle.aurora.jndi.sess_iiop.ServiceCtx;
import javax.naming.Context;
import javax.naming.InitialContext;
import java.util.Hashtable;
public class Client {
public static void main (String [] args) throws Exception {
int count = 0 ;
String access = "" ;
if (args.length != 4) {
System.out.println("usage: Client serviceURL objectName
user password");
System.exit(1);
String serviceURL = args [0];
String objectName = args [1];
String user = args [2];
String password = args [3];
Hashtable env = new Hashtable();
env.put(Context.URL_PKG_PREFIXES, "oracle.aurora.jndi");
env.put(Context.SECURITY_PRINCIPAL, user);
env.put(Context.SECURITY_CREDENTIALS, password);
env.put(Context.SECURITY_AUTHENTICATION,
ServiceCtx.NON_SSL_LOGIN);
Context ic = new InitialContext(env);
MITUserHome home = (MITUserHome)ic.lookup (serviceURL +
objectName);
MITUser testBean = home.create ();
count = testBean.validateUserName("MITA");
if (count > 0 )
System.out.println ("Valid User");
else
System.out.println ("Invalid User");
count = testBean.validatePassword("MITA", "MITA");
if (count > 0 )
System.out.println ("Valid Password");
else
System.out.println ("Invalid Password");
access = testBean.validateSearchAccess("MITA", "MITA");
if ( access.equalsIgnoreCase("YES") )
System.out.println ("Search Access Available");
else
System.out.println ("Search Access Denied");
The Descriptor file
// MIT UserBean EJB deployment descriptor
SessionBean mituserServer.MITUserBean {
BeanHomeName = "test/mitUserJDBCBean";
RemoteInterfaceClassName = mituser.MITUser;
HomeInterfaceClassName = mituser.MITUserHome;
AllowedIdentities = {MIT};
SessionTimeout = 20;
StateManagementType = STATEFUL_SESSION;
RunAsMode = CLIENT_IDENTITY;
TransactionAttribute = TX_REQUIRED;
Batch File for deploying the ejb
@echo off
if (%ORACLE_HOME%)==() goto usage
if (%ORACLE_SERVICE%)==() goto usage
if (%JDK_CLASSPATH%)==() goto usage
@echo on
set CLASSPATH=.;%ORACLE_HOME%\lib\aurora_client.jar;%ORACLE_HOME%
\jdbc\lib\classes111.zip;%ORACLE_HOME%\sqlj\lib\translator.zip;%
ORACLE_HOME%\lib\vbjorb.jar;%ORACLE_HOME%\lib\vbjapp.jar;%
JDK_CLASSPATH%
javac -g mituser\MITUser.java
javac -g mituser\MITUserHome.java
javac -g mituserServer\MITUserBean.java
jar cf0 mituser.jar mituser\MITUser.class
mituser\MITUserHome.class mituserServer\MITUserBean.class
javac -g Client.java
call deployejb -republish -temp temp -u mit -p mit -s %
ORACLE_SERVICE% -descriptor mituser.ejb mituser.jar
@echo off
goto done
:usage
@echo -------------------------------------------------------
@echo Following are the requirements to run this script
@echo set ORACLE_HOME to installed Oracle home
@echo set ORACLE_SERVICE to the CORBA service name of
your databae
@echo for example sess_iiop://localhost:2481:ORCL
@echo set JDK_CLASSPATH to the full path of your JDK
classes.zip
@echo -------------------------------------------------------
:done
Batch file for running the cleint program
@echo off
if (%ORACLE_HOME%)==() goto usage
if (%ORACLE_SERVICE%)==() goto usage
if (%JDK_CLASSPATH%)==() goto usage
@echo on
set CLASSPATH=.;%ORACLE_HOME%\lib\aurora_client.jar;%ORACLE_HOME%
\jdbc\lib\classes111.zip;%ORACLE_HOME%\sqlj\lib\translator.zip;%
ORACLE_HOME%\lib\vbjorb.jar;%ORACLE_HOME%\lib\vbjapp.jar;%
JDK_CLASSPATH%;server_generated.jar
java Client %ORACLE_SERVICE% /test/mitUserJDBCBean mit mit
@echo off
goto done
:usage
@echo -------------------------------------------------------
@echo Following are the requirements to run this script
@echo set ORACLE_HOME to installed Oracle home
@echo set ORACLE_SERVICE to the CORBA service name of
your databae
@echo for example sess_iiop://localhost:2481:ORCL
@echo set JDK_CLASSPATH to the full path of your JDK
classes.zip
@echo -------------------------------------------------------
:done
I know this is not strictly to do with JDBC but there appears to
be no discussion forum for EJB
Hoping for a response soon as it us very URGENT
Thanks
Mita
nullI have created and published a EJB in Oracle 8i (in a particular
schema) by running the deployejb tool supplied. The ejb was
published successfully. On running the client program I get an
error saying that the mybeans's HomeHelper class cannot be
found. This error occurs when there is a lookup to the home
interface of the bean. The exception thrown says Reasons are
unknown. On checking the objects of type 'JAVA CLASS' I found
that the homeHelper class object had been created automatically
be the deploy process. What is the reason for the class not
found exception and what can I do to correct it. ?
The code for the beans is as given below :
Home Interface
package mituser ;
import javax.ejb.*;
import java.rmi.RemoteException;
public interface MITUserHome extends EJBHome {
public MITUser create()
throws CreateException, RemoteException;
Remote Interface
package mituser ;
import javax.ejb.EJBObject;
import java.rmi.RemoteException;
public interface MITUser extends EJBObject {
public int validateUserName (String username)
throws java.sql.SQLException, RemoteException;
public int validatePassword (String username, String password)
throws java.sql.SQLException, RemoteException;
public String validateSearchAccess (String username, String
password)
throws java.sql.SQLException, RemoteException;
Bean
package mituserServer ;
import java.sql.*;
import java.rmi.RemoteException;
import javax.ejb.*;
public class MITUserBean implements SessionBean {
SessionContext ctx;
public void ejbCreate() throws CreateException,
RemoteException {
public void ejbActivate() {
public void ejbPassivate() {
public void ejbRemove() {
public void setSessionContext(SessionContext ctx) {
this.ctx = ctx;
public int validateUserName (String username) throws
SQLException, RemoteException
int count = 0 ;
Connection conn =
new oracle.jdbc.driver.OracleDriver().defaultConnection ();
PreparedStatement ps =
conn.prepareStatement ("select count(username) from
useraccountinfo where username = ?");
try {
ps.setString (1, username);
ResultSet rset = ps.executeQuery ();
if (!rset.next ())
throw new RemoteException ("no registered user with User
Name " + username);
count = rset.getShort(1) ;
return count ;
} finally {
ps.close();
public int validatePassword (String username, String password)
throws SQLException, RemoteException
int count = 0 ;
Connection conn =
new oracle.jdbc.driver.OracleDriver().defaultConnection ();
PreparedStatement ps =
conn.prepareStatement ("select count(username) from
useraccountinfo where username = ? and password = ?");
try {
ps.setString (1, username);
ps.setString(2, password);
ResultSet rset = ps.executeQuery ();
if (!rset.next ())
throw new RemoteException ("Invalid Password ");
count = rset.getShort(1) ;
return count ;
} finally {
ps.close();
public String validateSearchAccess (String username, String
password) throws SQLException, RemoteException
String searchaccess = "" ;
Connection conn =
new oracle.jdbc.driver.OracleDriver().defaultConnection ();
PreparedStatement ps =
conn.prepareStatement ("select searchprofileaccess from
useraccountinfo where username = ? and password = ?");
try {
ps.setString (1, username);
ps.setString(2, password);
ResultSet rset = ps.executeQuery ();
if (!rset.next ())
throw new RemoteException ("Access Denied for " +
username );
searchaccess = rset.getString(1) ;
return searchaccess ;
} finally {
ps.close();
Client program
import mituser.MITUser;
import mituser.MITUserHome;
import oracle.aurora.jndi.sess_iiop.ServiceCtx;
import javax.naming.Context;
import javax.naming.InitialContext;
import java.util.Hashtable;
public class Client {
public static void main (String [] args) throws Exception {
int count = 0 ;
String access = "" ;
if (args.length != 4) {
System.out.println("usage: Client serviceURL objectName
user password");
System.exit(1);
String serviceURL = args [0];
String objectName = args [1];
String user = args [2];
String password = args [3];
Hashtable env = new Hashtable();
env.put(Context.URL_PKG_PREFIXES, "oracle.aurora.jndi");
env.put(Context.SECURITY_PRINCIPAL, user);
env.put(Context.SECURITY_CREDENTIALS, password);
env.put(Context.SECURITY_AUTHENTICATION,
ServiceCtx.NON_SSL_LOGIN);
Context ic = new InitialContext(env);
MITUserHome home = (MITUserHome)ic.lookup (serviceURL +
objectName);
MITUser testBean = home.create ();
count = testBean.validateUserName("MITA");
if (count > 0 )
System.out.println ("Valid User");
else
System.out.println ("Invalid User");
count = testBean.validatePassword("MITA", "MITA");
if (count > 0 )
System.out.println ("Valid Password");
else
System.out.println ("Invalid Password");
access = testBean.validateSearchAccess("MITA", "MITA");
if ( access.equalsIgnoreCase("YES") )
System.out.println ("Search Access Available");
else
System.out.println ("Search Access Denied");
The Descriptor file
// MIT UserBean EJB deployment descriptor
SessionBean mituserServer.MITUserBean {
BeanHomeName = "test/mitUserJDBCBean";
RemoteInterfaceClassName = mituser.MITUser;
HomeInterfaceClassName = mituser.MITUserHome;
AllowedIdentities = {MIT};
SessionTimeout = 20;
StateManagementType = STATEFUL_SESSION;
RunAsMode = CLIENT_IDENTITY;
TransactionAttribute = TX_REQUIRED;
Batch File for deploying the ejb
@echo off
if (%ORACLE_HOME%)==() goto usage
if (%ORACLE_SERVICE%)==() goto usage
if (%JDK_CLASSPATH%)==() goto usage
@echo on
set CLASSPATH=.;%ORACLE_HOME%\lib\aurora_client.jar;%ORACLE_HOME%
\jdbc\lib\classes111.zip;%ORACLE_HOME%\sqlj\lib\translator.zip;%
ORACLE_HOME%\lib\vbjorb.jar;%ORACLE_HOME%\lib\vbjapp.jar;%
JDK_CLASSPATH%
javac -g mituser\MITUser.java
javac -g mituser\MITUserHome.java
javac -g mituserServer\MITUserBean.java
jar cf0 mituser.jar mituser\MITUser.class
mituser\MITUserHome.class mituserServer\MITUserBean.class
javac -g Client.java
call deployejb -republish -temp temp -u mit -p mit -s %
ORACLE_SERVICE% -descriptor mituser.ejb mituser.jar
@echo off
goto done
:usage
@echo -------------------------------------------------------
@echo Following are the requirements to run this script
@echo set ORACLE_HOME to installed Oracle home
@echo set ORACLE_SERVICE to the CORBA service name of
your databae
@echo for example sess_iiop://localhost:2481:ORCL
@echo set JDK_CLASSPATH to the full path of your JDK
classes.zip
@echo -------------------------------------------------------
:done
Batch file for running the cleint program
@echo off
if (%ORACLE_HOME%)==() goto usage
if (%ORACLE_SERVICE%)==() goto usage
if (%JDK_CLASSPATH%)==() goto usage
@echo on
set CLASSPATH=.;%ORACLE_HOME%\lib\aurora_client.jar;%ORACLE_HOME%
\jdbc\lib\classes111.zip;%ORACLE_HOME%\sqlj\lib\translator.zip;%
ORACLE_HOME%\lib\vbjorb.jar;%ORACLE_HOME%\lib\vbjapp.jar;%
JDK_CLASSPATH%;server_generated.jar
java Client %ORACLE_SERVICE% /test/mitUserJDBCBean mit mit
@echo off
goto done
:usage
@echo -------------------------------------------------------
@echo Following are the requirements to run this script
@echo set ORACLE_HOME to installed Oracle home
@echo set ORACLE_SERVICE to the CORBA service name of
your databae
@echo for example sess_iiop://localhost:2481:ORCL
@echo set JDK_CLASSPATH to the full path of your JDK
classes.zip
@echo -------------------------------------------------------
:done
I know this is not strictly to do with JDBC but there appears to
be no discussion forum for EJB
Hoping for a response soon as it us very URGENT
Thanks
Mita
null -
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All,
I am quite new to RMI programming, although i am an experienced java programmer. I am facing a problem in starting the remote server program which i wrote for RMI. I am getting class not found exception for "stub" class eventhough the class is in the classpath.
Following is the error console:
cmd> java -classpath "D:\Eclipse_WorkSpaces\WS2\RMITests\classes" MyServerImplementation
GetNames error: RemoteException occurred in server thread; nested exception is:
java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is:
java.lang.ClassNotFoundException: MyServerImplementation_Stub
java.rmi.ServerException: RemoteException occurred in server thread; nested exception is:
java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is:
java.lang.ClassNotFoundException: MyServerImplementation_Stub
at sun.rmi.server.UnicastServerRef.oldDispatch(UnicastServerRef.java:396)
at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:250)
at sun.rmi.transport.Transport$1.run(Transport.java:159)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.Transport.serviceCall(Transport.java:155)
at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:535)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:790)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:649)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
at java.lang.Thread.run(Thread.java:619)
at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(StreamRemoteCall.java:255)
at sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:233)
at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:359)
at sun.rmi.registry.RegistryImpl_Stub.rebind(Unknown Source)
at java.rmi.Naming.rebind(Naming.java:160)
at MyServerImplementation.main(MyServerImplementation.java:21)
Caused by: java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is:
java.lang.ClassNotFoundException: MyServerImplementation_Stub
at sun.rmi.registry.RegistryImpl_Skel.dispatch(Unknown Source)
at sun.rmi.server.UnicastServerRef.oldDispatch(UnicastServerRef.java:386)
at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:250)
at sun.rmi.transport.Transport$1.run(Transport.java:159)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.Transport.serviceCall(Transport.java:155)
at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:535)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:790)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:649)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
at java.lang.Thread.run(Thread.java:619)
Caused by: java.lang.ClassNotFoundException: MyServerImplementation_Stub
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 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:247)
at sun.rmi.server.LoaderHandler.loadClass(LoaderHandler.java:434)
at sun.rmi.server.LoaderHandler.loadClass(LoaderHandler.java:165)
at java.rmi.server.RMIClassLoader$2.loadClass(RMIClassLoader.java:620)
at java.rmi.server.RMIClassLoader.loadClass(RMIClassLoader.java:247)
at sun.rmi.server.MarshalInputStream.resolveClass(MarshalInputStream.java:197)
at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1575)
at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1496)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1732)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351)
... 12 morePLEASE ADVISE HOW TO RESOLVE THIS...
Following are my classes:
MyRemoteInterface.java
import java.rmi.Remote;
import java.rmi.RemoteException;
public interface MyRemoteInterface extends Remote {
public String[] getNames() throws RemoteException;
public class MyServerImplementation extends UnicastRemoteObject implements
MyRemoteInterface {
public MyServerImplementation()throws RemoteException{
super();
public String[] getNames() throws RemoteException{
return new String[]{"Name1","Name2","Name3","Name4"};
public static void main(String args[]) {
try {
// Create an object of the HelloWorldServer class.
MyRemoteInterface obj = new MyServerImplementation();
// Bind this object instance to the name "HelloServer".
Naming.rebind("rmi://localhost:1985/GetNames", obj);
System.out.println("GetNames bound in registry");
catch (Exception e) {
System.out.println("GetNames error: " + e.getMessage());
e.printStackTrace();
public class MyRMIClient {
*@param args*
public static void main(String[] args) {
try {
MyRemoteInterface remObj = (MyRemoteInterface) Naming.lookup("rmi://localhost:1985/GetNames");
System.out.println("Names are "+remObj.getNames());
catch(Exception e) {
System.out.println("Problem encountered accessing remote object "+e);
}That's a remote exception coming from the registry. You need to learn to recognize remote exceptions and their source, it's a mjaor source of confusion in RMI.
In this case it's the registry that can't find the stub class.
The stub class needs to be in the CLASSPATH of (i) the Registry and (ii) the client as well. Ditto the remote interface; ditto any application classes it refers to, and so on until closure.
The easiest way to achieve (i) is to start it in the server's JVM, with LocateRegistry.createRegistry(). -
Class not found exception when launching opencounterslogger.bat
PORTAL_HOME=D:\bea\alui\ptportal\10.3.0
Expected PORTAL_HOME=D:\bea\alui\ptportal\10.3.0
claspath is D:\bea\alui\ptportal\10.3.0\lib\java\jakarta-oro-2.0.7.jar;D:\bea\alui\ptportal\10.3.0\lib\java\openfoundation.jar;D:\bea\alui\ptportal\10.3.0\lib\java\openlog-framework.jar;D:\bea\alui\ptportal\10.3.0\lib\java\openconfig.jar;D:\bea\alui\ptportal\10.3.0\lib\java\openkernel.jar;D:\bea\alui\ptportal\1
0.3.0\lib\java\pmb.jar;D:\bea\alui\ptportal\10.3.0\lib\java\opencounters.jar
Exception in thread "Main Thread" java.lang.NoClassDefFoundError: com/plumtree/openkernel/impl/counters/adaptor/logger/PTRemoteCounterLoggerMain
Press any key to continue . . .
The class PTRemoteCounterLoggerMain is not in any of the jars in the classpath. Also opencountersconsole.bat is not to be seen is the installationHi Mark,
I have seen your two posts and there are something you need to notice:
Where the ClassNotFound exception you got? From deployment tool or
application server kjs process?
Of course, you need not to add supporting classes to each ejb jars or ears.
1. If you use deployment tool to package your application, I'm sure you'll
fail to resovle your classes without supporting classes added to jars.
Please select Edit->Preference,in Classpath entry, enter the supporting
classes(packaged to jar files) location. This should work.
2. After deploy to ias, please edit the registry using kregedit which you
described in your posts.
Regards,
Johnson
"Mark Priest" <[email protected]> wrote in message
news:9s6h33$[email protected]..
When I deploy EJBs to the iPlanet app server I find that I need to include
all supporting classes in each ejb jar file. According to the
Administrator's manual I should be able to modify the kjs classpath bydoing
the following:
On Windows
a.. Open iPlanet Registry Editor.
(See About iPlanet Registry Editor)
b.. Open the following key:
SOFTWARE\iPlanet\Application Server\6.0\Java\
c.. Modify the class path and restart the server for the change to take
effect.
However, when I add my supporting classes to a jar in this directory Istill
get a class not found exception when I run the deployment tool.
Adding the classes to each EJB jar is redundant and introduces lots of
problems. How should I configure iPlanet so I only need to put my
supporting classes in one place?
Thanks,
Mark -
Hi
I have impoted project file in eclipse in new machine using option import from existing workbence . When i stat to debug this project ,
i am getting error as class not found exception : com.mysql.jdbc.driver . my project folder already consist of mysql .jar file in /web appls/web-inf folder.
Application is running successfully in other machine from where i took the application file. As this error appeared I also added jar file into project path as Project ---->properties-- build java path---libraries----add external jar file.
kindly hep me.Sounds like an eclipse question - not a JDBC one.
But since eclipse is telling you it can't find it then it means it is not in the eclipse path. So you must add it. (The fact that it is somewhere is irrelevant - all that matters is it is not in the class path.) -
Class Not found Exception for invoking BPEL process through the Java code
Hi.
The JDeveloper IDE raise the Exception From the invoking the BPEL process through the java code .Class Not Found Exception (Locator,ID.......).What is process of importing these classes from API.In your code (.bpel file) import the library using the bpelx:exec tag. For example the adding the following entry in your .bpel file imports the com.oracle.bpel.client.util library.
<bpelx:exec import="com.oracle.bpel.client.util.*"/> -
B2B Java Callout Class not found exception
Hello B2B Gurus,
I am facing class not found exception, when trying to call a java code from B2B and below the configuration done from B2B side.
Could you please help me to identify that the configuration done suffice the requirement
1.Created a call out from
Adminstration-- Callout-- Create Callout -- XXJavaCallout(Name of the Java Callout)
Administration-- Callout Details -- Implementation Class -- XXClassFileName
Administration-- Callout Details -- Library Name -- XXJarFileName.jar
Administration-- Configuration -- Callout Directory -- xx/yy/zz (UNIX server that is accesible from B2B)
2.Partners--XX--Delivery Channel -- Select the channel where we need the call out -- Channel Attributes -- Transport Callout -- XXJavaCallout
3.Agreement--Callout -- XXJavaCallout
Place the jar file in xx/yy/zz UNIX location.
Please let me know if any steps I have missed for using the callout functionality.
Thanks,
Sunil
Edited by: Dathu Sunil on Mar 29, 2012 8:17 AMSunil,
Administration-- Callout Details -- Implementation Class -- XXClassFileNameMake sure that you are giving complete name of the class (without extension .class.). For an example if your class name is Sample and it is in package a.b.c then give class name as a.b.c.Sample
Administration-- Configuration -- Callout Directory -- xx/yy/zz (UNIX server that is accesible from B2B)This must be valid directory existing on machine where B2B is installed.
2.Partners--XX--Delivery Channel -- Select the channel where we need the call out -- Channel Attributes -- Transport Callout -- XXJavaCallout
3.Agreement--Callout -- XXJavaCalloutTransport Callout and Agreement Callouts are used for different purpose. Are you sure that you really need both in your case?
You may like to refer -
http://docs.oracle.com/cd/E17904_01/integration.1111/e10229/callouts.htm#CHDEFBDG
Regards,
Anuj -
Class Not Found Exception After Connecting From a JDeveloper
Hi,
I am following the tutorial on SOA and started to experience problems in deployments (all but the console, including em) after the connection to the remote weblogic (10.3.5) from JDeveloper. I would know if the connection modifies the WLS environment. Unfortunately I did not note the message before wiping the setup, but found many entries on Google referring to some ADF library. I followed the suggestion to apply the adf runtime to the WLS install but this not helped.
By the way, I would just understand if the remote connection from a JDeveloper adds some configuration which is then eventually not found in the target WLS.
Thanks
Fabio D'Alfonso
http://www.fabiodalfonso.comCan you check the log files of soa_server1, which are located in the <domain-home>/servers/<server-name>/logs.
There are probably some occurences of class not found exceptions.
When you are using the node manager to start your environment you have to make sure that StartScriptEnabled is set
to true in the nodemanager.properties file (located in the directory: <wl-home>/common/nodemanager
In the section "Starting the SOA environment" here - http://middlewaremagic.com/weblogic/?p=6040
an example is presented -
Class not found exception for the startup class defined.
iam using weblogic server 10 and bea jrockit 1.5.0.12.
i have created a startup class in the admin console for a web project and i have deployed the war file using the console in a user defined domains, user project directory.
when i start the server, iam getting class not found exception for the startup class.
But, the startup class is available in the web archive (war). how should we add the classes and jars in the war to the classpath in setDomainEnv.sh or is there any other setting available in the console to enable this.Hello Julius,
yes sure, we can move this post to the NW admin forum. I have already posted similar thread on sun forums. I was hoping that someone from SAP SDN already tackled this problem and if not someone specialized in J2EE Engine could troubleshoot me from the class problem I'm getting. I don't know if it's specific from the agent or if this ClassNotFound is a general SAP J2EE Engine error relating to a library not correclty defined.
Kind regards,
Tanguy Mezzano -
VBWS_MARA_CLASSIFICATION_GET - Class not found exception
Hi,
I`m trying to get the classification and the characteristics from material using VBWS_MARA_CLASSIFICATION_GET. When I test it, it raises the Class not Found Exception for the Materialnumber I`ve given in.
For the Testmaterial classification and characteristics are created.
Can anyone help me? Where could be the problem?Hi
Use the following BAPI's:
BAPI_OBJCL_GETDETAIL
BAPI_OBJCL_CHANGE
or use the fun module:
CLAF_CLASSIFICATION_OF_OBJECTS.
for getting the classification and characteristics data of Material
instead of VBWS_MARA_CLASSIFICATION_GET.
Reward points if useful
Regards
Anji -
JNLPClassloader raises class not found Exception
I have some class files which are part of a jar file. I made sure this jar is downloaded by JWS on client machine. When application is launched in stand alone mode then JNLPClassloader complains at runTime that particular class is missing.Although this class is already inside jar file.
Did any one faced similar situation when JNLPClassloader raises "Class Not found Exception" ? How this can be avoided?yeah i made sure classes are put in proper folder. As i am using Eclipse,JDK1.6, jboss so when i launch application directly from Eclipse then it works fine.
But if i launch through JWS then it does not work. I am not able to understand why JWS can not detect classes inside Jar file downloaded on client machine ? -
Hi All,
While i'm trying to activate FORM (Interactive Form in Transaction SFP), i'm getting error -
ADS: com.adobe.ProcessingException: Class not found exception while loading class SAPForm, classpath: /usr/sap/AHS/DVEBMGS00/exe/jstart7 1.jar/usr/sap/AHS/DVEBMGS00/exe.
Could anyone let me know the way to resolve this issue.
Thanks and Regards,
SunilMany Thanks for the reply-It's working now
I added the MySQL connector in the following manner
1)Open the Tom Cat server console by Selecting 'Servers' in Package Explorer
2)Right Click 'Tomcat v5.5 at localhost.server'
3)Select 'Open Launch Configuration' under 'General Information'
4)Select the 'Classpath' tab in the Edit configuration window that opens
5)Select 'Add External Jars' and add the required connector -
RMI stub class not found exception
Configuration:
OC4J Release 2
Windows 2000
* I get a stub class not found exception when the RMI server is instantiated.
* I compiled the implementation class using rmic and created a jar file containing the stub and skeleton classes. The jar file has been included in both the WEB-INF/lib and the <OC4J-home>/j2ee/home/lib directories.
* "TestServer" class (given below) is instantiated in a servlet init() method (the exception is thrown here).
* Following are file listings (with code):
Remote Interface ---> Test.java
Implementation class ---> TestImpl.java
TestServer.java
Test obj = new TestImpl();
Context ctx = new InitialContext();
ctx.rebind("TestService", obj);
Any help is appreciated.
- RangaFound the solution. Thanx.
-
Class not found in applet using 2 jar files
I have an applet which has been working for years as a stand alone or connecting directly to a derby database on my home server. I have just changed it to connect to MySQL on my ISP server via AJAX and PHP.
I am now getting a class not found error in my browser, probably because I'm stuffing up the class path.
The HTML I am using to call the applet is:
<applet code="AMJApp.class"
codebase="http://www.interactived.com/JMTalpha"
archive="AMJ014.jar,plugin.jar"
width="500"height="500"
MAYSCRIPT style="border-width:0;"
name="jsap" id="jsap"></applet>The AMJ014.jar contains the applet and supporting class files.
The error message is strange to me because it refers to a class I noticed on another web page but which has nothing to do with my applet. Anyway, the message in full is:
load: class NervousText.class not found.
java.lang.ClassNotFoundException: NervousText.class
at sun.plugin2.applet.Applet2ClassLoader.findClass(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass0(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadCode(Unknown Source)
at sun.plugin2.applet.Plugin2Manager.createApplet(Unknown Source)
at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Exception: java.lang.ClassNotFoundException: NervousText.class
java.lang.UnsupportedClassVersionError: AMJApp : Unsupported major.minor version 51.0
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClassCond(Unknown Source)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.defineClassHelper(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.access$100(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader$2.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.plugin2.applet.Plugin2ClassLoader.findClassHelper(Unknown Source)
at sun.plugin2.applet.Applet2ClassLoader.findClass(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass0(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadCode(Unknown Source)
at sun.plugin2.applet.Plugin2Manager.createApplet(Unknown Source)
at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Exception: java.lang.UnsupportedClassVersionError: AMJApp : Unsupported major.minor version 51.0Thanks again.
The page code is:
<html>
<head>
<title>Applet to JavaScript to PHP</title>
</head>
<body>
<script type="text/javascript">
function updateWebPage(myArg)
document.getElementById("txt1").innerHTML=myArg;
if (myArg=="")
document.getElementById("cbxItem").innerHTML="";
return;
if (window.XMLHttpRequest)
{// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp=new XMLHttpRequest();
else
{// code for IE6, IE5
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
xmlhttp.onreadystatechange=function()
if (xmlhttp.readyState==4 && xmlhttp.status==200)
document.getElementById("cbxItem").innerHTML=xmlhttp.responseText;
xmlhttp.open("GET","putitem.php?id="+myArg,true);
xmlhttp.send();
</script>
<form>
<table border=1 align='center' cellpadding=0 cellspacing=0 >
<tr><td style='text-align:center; background-color:#C0C0C0'>Compiled Java Applet</td></tr>
<tr><td><applet code="AMJApp.class" codebase="http://www.interactived.com/JMTalpha" archive="AMJ014.jar" width="500"height="500" MAYSCRIPT style="border-width:0;" name="jsap" id="jsap"></applet> </td></tr>
<tr><td style='text-align:center; background-color:#C0C0C0'>HTML Textbox filled by JavaScript</td></tr>
<tr><td><textarea style='width:500px; height:50px' name='txt1' id='txt1'>Query goes here</textarea></td></tr>
<tr><td style='text-align:center; background-color:#C0C0C0'>HTML diagnostic messages rendered by PHP script</td></tr>
<tr><td><div id="cbxItem">PHP info will populate this space</div></td></tr>
</table>
</form>
</body>
</html>The URL of the problem page is:
http://www.interactived.com/JMTalpha/AMJTest.htm
The code in the page is based on the following test page, which works:
http://www.interactived.com/test5Applet.htm
And the Applet, before I made any changes can be seen at this address:
http://www.interactived.com/jartest0906.htm
Thanks again for you interest.
Edited by: 886473 on 21-Sep-2011 00:47
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