IPlanet Web Server  gives classnot found "oracle.jdbc.driver.OracleDriver "

I have installed iplaet web server 6 eval. copy on red hat linux 6.2 , oracle 8i 8.1.6 having default classpath with
/usr/local/jdk1.2.2:/usr/local/jsdk.jar:/usr/local/jdk1.2.2/oracle.jar
when we run a servlet it gives classnot found "oracle.jdbc.driver.OracleDriver "
Any one can give me where to place oracle.jar or how to overcome from this error
the code is
import java.util.*;
import java.sql.*;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import oracle.jdbc.driver.*;
* This is a simple example of an HTTP Servlet. It responds to the GET
* and HEAD methods of the HTTP protocol.
public class Hello2 extends HttpServlet
public void doGet (HttpServletRequest request,HttpServletResponse response) throws ServletExc
eption, IOException
PrintWriter out;
String title = "12Example iPlanet JServ Servlet";
response.setContentType("text/html");
out = response.getWriter();
Statement stmt=null;
ResultSet rs=null;
Connection con;
out.println("<H2> iPlanet is working!!</H2>");
try
// String url = "jdbc:oracle:thin:@80.0.0.2:1521:sahara";
// Class.forName("oracle.jdbc.driver.OracleDriver");
con=DriverManager.getConnection("jdbc:oracle:thin:@(description=(address=(host=80
.0.0.2)(protocol=tcp)(port=1521))(connect_data=(sid=star)))","zigma","zigma");
// con = DriverManager.getConnection(url, "rahul", "rahul");
String sQuery2="select zrsbname from zrsbmast where zrsbcode=9999";
stmt=con.createStatement();
rs = stmt.executeQuery(sQuery2);
rs.next();
/*String sQuery="{call shift20()}";
cstmt=con.prepareCall(sQuery);
cstmt.executeQuery(); */
out.println("<HTML><HEAD><TITLE>");
out.println(title);
out.println("</TITLE></HEAD><BODY bgcolor=\"#FFFFFF\">");
out.println("<H1>"+iCount+"</H1>");
out.println("<H1>" + title + "</H1>");
out.println("<H2> Congratulations, iPlanet is working!1<br>");
out.println("</BODY></HTML>");
out.close();
catch(SQLException e1)
out.println("<p> Error in ");
out.println("<p> Errmsg="+ e1.getMessage());
catch(Exception e)
out.println("<p> Error in ");
out.println("<p> Errmsg="+ e.getMessage());

you must be having an administrative console for iplanet
there the classpath can be set to the required location
Open the Administrative console for it..

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    <> <101047> <[WebAppServletContext(5367844,console,/console)] actions:
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    ####<15/08/2002 14:10:18> <Info> <HTTP> <qawebmethods> <myserver>
    <ExecuteThread: '1' for queue: '__weblogic_admin_html_queue'> <system>
    <> <101047> <[WebAppServletContext(5367844,console,/console)]
    FileServlet: init>
    ####<15/08/2002 14:10:18> <Info> <HTTP> <qawebmethods> <myserver>
    <ExecuteThread: '1' for queue: '__weblogic_admin_html_queue'> <system>
    <> <101047> <[WebAppServletContext(5367844,console,/console)]
    FileServlet: Using standard I/O>

    "thorick" <[email protected]> wrote in message news:<[email protected]>...
    Most likely, the OCI libraries could not be loaded.
    Before continuing down this path, is there any reason
    why you want to use an OCI based Driver as opposed to the
    all Java Oracle thin driver ?There is indeed a valid reason for my choice.
    I am currently connecting to the Oracle "Rdb" 7.0 database (located on
    VMS) - not Oracle Oracle.
    The SQL Service software we're currently using is version 7.1. This
    version works well with the OCI8 driver (when connecting to the
    database from Windows NT). This version of SQL Service however does
    NOT work for the THIN driver (unless we upgrade the SQL Service to
    version 7.1.5.5 - which we're not prepared to do so because it is not
    stable enough from our previous test/trials). SQLSRV Version 7.1.5.5
    works for THIN driver but it will result in uncommitted
    transactions/unresolved connection/stopping of listener issues and
    there is a need to restart the service from time to time. Oracle has
    since confirmed that this is a bug that they have yet to resolve...
    So we have to stick to OCI8 (THICK) for the time being. I would really
    appreciate it very much if you can tell me the various OCI libraries
    that I need to load (in terms of WebLogic Server config file settings
    etc..).
    By the way I have already installed the Oracle 8 client software on
    the NT server (where WebLogic Server is) and I have also set up the
    relevant SID (using the Net8 Assistant) that points to the Oracle Rdb
    database on the VMS. I have also tried using SQL*Plus to connect to
    the database and I can connect properly to the database. But WebLogic
    simply doesn't seem to load the software.
    Help...
    Regards,
    Bobby Brown, writing from Australia.

  • Java.lang.NoClassDefFoundError: oracle/jdbc/driver/OracleDriver

    When I run java servlet test_ora.java with IE6.0 I get the following error page:
    HTTP Status 500 -
    type Exception report
    message
    description The server encountered an internal error () that prevented it from fulfilling this request.
    exception
    javax.servlet.ServletException: Servlet execution threw an exception
         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
         at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:260)
         at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:646)
         at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:483)
         at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
         at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
         at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:646)
         at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:483)
         at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
         at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2349)
         at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
         at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:646)
         at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)
         at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:644)
         at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:171)
         at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:644)
         at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:483)
         at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
         at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
         at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:646)
         at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:469)
         at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:644)
         at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:483)
         at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
         at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:223)
         at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:405)
         at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:376)
         at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:508)
         at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:518)
         at java.lang.Thread.run(Thread.java:536)
    root cause
    java.lang.NoClassDefFoundError: oracle/jdbc/driver/OracleDriver
         at test_ora.doGet(test_ora.java:21)
         at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
         at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
         at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:260)
         at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:646)
         at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:483)
         at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
         at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
         at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:646)
         at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:483)
         at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
         at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2349)
         at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
         at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:646)
         at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)
         at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:644)
         at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:171)
         at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:644)
         at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:483)
         at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
         at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
         at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:646)
         at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:469)
         at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:644)
         at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:483)
         at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
         at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:223)
         at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:405)
         at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:376)
         at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:508)
         at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:518)
         at java.lang.Thread.run(Thread.java:536)
    Java Web Services Developer Pack/1.0-fcs
    I thought it is about JDBC configuration. But when I run JdbcCheckup.java everything works fine. Can anybody help me, please?
    test_ora.java looks like this:
    import java.io.*;
    import javax.servlet.*;
    import javax.servlet.http.*;
    import java.sql.*;
    public class test_ora extends HttpServlet {
    public void doGet(HttpServletRequest request,
    HttpServletResponse response)
    throws ServletException, IOException {
    String str_dok_numer, str_f_inkraft;
    int int_dok_wal_id;
    Connection conn=null;
    Statement s = null;
    response.setContentType("text/html;charset=iso-8859-2");
    PrintWriter out = response.getWriter();
    try {
    DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());
    conn = DriverManager.getConnection(
    "jdbc:oracle:thin:@192.168.15.2:1521:DB2","janusz","kimono");
    s = conn.createStatement();
    } catch (SQLException e) {
    out.println("Blad polaczenia z baza danych: " + e.getMessage());
    try {
    ResultSet r =s.executeQuery("select dok_numer, f_inkraft, dok_wal_id from gndlf_umowy_inkraft");
    out.println("DOK_NUMER\tF_INKRAFT\tDOK_WAL_ID");
    while(r.next()){
    out.println (r.getString (1) +"\t" + r.getString (2) + "\t" +r.getString (3));
    conn.close();
    } catch (Exception e) {
    out.println("Wystapil problem z wyslaniem SQL do bazy danych: " + e.getMessage());
    finally {
    try { conn.close(); }
    catch(SQLException e) {}
    and here is code for JdbcCheckup.java (I get it from Internet and made some modifications):
    * This sample can be used to check the JDBC installation.
    * Just run it and provide the connect information. It will select
    * "Hello World" from the database.
    // You need to import the java.sql package to use JDBC
    import java.sql.*;
    // We import java.io to be able to read from the command line
    import java.io.*;
    class JdbcCheckup {
    public static void main(String args[])
    throws SQLException, IOException
    // Load the Oracle JDBC driver
    DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());
    // Prompt the user for connect information
    System.out.println("Please enter information to test connection to the database");
    String user;
    String password;
    String database;
    user = readEntry("user: ");
    int slash_index = user.indexOf('/');
    if (slash_index != -1)
    password = user.substring(slash_index + 1);
    user = user.substring(0, slash_index);
    else
    password = readEntry("password: ");
    database = readEntry("database(a TNSNAME entry): ");
    System.out.print("Connecting to the database...");
    System.out.flush();
    System.out.println("Connecting...");
    //Connection conn = DriverManager.getConnection("jdbc:oracle:oci8:@" + database, user, password);
    Connection conn = DriverManager.getConnection("jdbc:oracle:thin:@192.168.15.2:1521:" + database, user, password);
    System.out.println("connected!!!");
    // Create a statement
    Statement stmt = conn.createStatement();
    // Do the SQL "Hello World" thing
    ResultSet rset = stmt.executeQuery("select 'Hello World' from dual");
    while (rset.next())
    System.out.println(rset.getString(1));
    // close the result set, the statement and connect
    rset.close();
    stmt.close();
    conn.close();
    System.out.println("Your JDBC installation is correct.");
    // Utility function to read a line from standard input
    static String readEntry(String prompt)
    try
    StringBuffer buffer = new StringBuffer();
    System.out.print(prompt);
    System.out.flush();
    int c = System.in.read();
    while (c != '\n' && c != -1)
    buffer.append((char)c);
    c = System.in.read();
    return buffer.toString().trim();
    catch(IOException e) {
    return "";
    I use Java Web Service Developer Pack 1.0 on Win98 SE, database Oracle 8.1.7 is installed on dedicated IBM server (AIX 4.x).
    I put these lines in autoexec.bat:
    set PATH=C:\Perl\bin\;"C:\j2sdk1.4.0\bin";%PATH%
    set CLASSPATH=.;C:\j2sdk1.4.0\lib\tools.jar;C:\j2sdk1.4.0\lib\classes12.zip;C:\j2sdk1.4.0\lib\classes111.zip;%CLASSPATH%
    set CLASSPATH=C:\jwsdp_1_0\common\lib\servlet.jar;C:\jwsdp_1_0\common\lib\jasper-compiler.jar;C:\jwsdp_1_0\common\lib\jasper-runtime.jar;%CLASSPATH%
    set JAVA_HOME=C:\j2sdk1.4.0

    I have the same problem. I created a JSP page that uses a class to retrieve database information. I added a main method to the class so I would be able to test it. When I test the class using the main method the method returns all the information from the database. When I try it using Tomcat, I get the following error: java.lang.NoClassDefFoundError: oracle/jdbc/driver/OracleDriver
    Does anyone have an idea of what is going on?
    My CLASSPATH configuration is the same.

  • Oracle.jdbc.driver.OracleDriver() problem

    Hi guys. I am taking a dbsystems class at school. We are required to connect to the schools oracle db using this package: oracle.jdbc.driver
    the code provided by the profesor is meant to be used by logging into unix accounts on the schools servers and running our java programs remotely. I've been trying to connect by running the java program localy.
    i'm using netbeans 4, with java5. netbeans tells me that this oracle.jdbc.driver package doesn't exist.
    here is the connection part of the code:
    //create the oracle driver
    DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());
    //create a connection object
    Connection conn = DriverManager.getConnection("jdbc:oracle:oci:@<blahblahblah>", "<myusername>", "<mysuperduperprivatepassword>");
    I have followed many forums and threads on the web. Most of them seem to be fixed just by renaming the classes12.zip file to .jar, placing them in the jre/lib folder and setting the path, but they all seem to be running the java program on the same computer as the database, where as i'm trying to connect remotely. i still tried following the instructions, and this still hasn't worked for me. so, my question is, will this even work since i am trying to connect remotely? and if not, how can i connect remotely to a database using only java? thanks
    gyro

    when you say build path, do u mean the same folder as my .java source? because it is. I don't know if u need to know this, but it will compile, but not run, and then it will print the above mentioned error. but in netbeans, it just tells you ahead of time why it wont run if u try to run it.
    anyways, from what i understand from what u wrote, i will need to use the thin driver...now that comes with the oracle.jdbc.driver package, but i just need to use a different call, right? like, instead of oracle.jdbc i would need oracle.thin, is this what u mean? and if it doesn't contain the thin driver, where can i find it? i found it onces before, but that was completely by accident. can someone supply a url? thanks
    jay

  • Duplicate class definition: oracle/jdbc/driver/OracleDriver

    Hi
    I using Jdeveloper 10.1.3.3 and I tried to add jdbc driver version 11.1.0.6.0 to Project by add Library to the project property. And I tried to run my application when step to connect database the program will occur the error.
    This below is the error
    500 Internal Server Error
    oracle.classloader.util.AnnotatedLinkageError: duplicate class definition: oracle/jdbc/driver/OracleDriver
         Invalid class: oracle.jdbc.driver.OracleDriver
         Loader: current-workspace-app.root:0.0.0
         Code-Source: /D:/oracle/jdbc/11/ojdbc5.jar
         Configuration: <library> in /D:/Jdev10133/jdev/mywork/Trainning/Trainning-oc4j-app.xml
         Dependent class: java.sql.DriverManager
         Loader: jre.bootstrap:1.5.0_06
         Code-Source: unknown
         Configuration: jre bootstrap
         at oracle.classloader.PolicyClassLoader.findLocalClass (PolicyClassLoader.java:1462) [D:/Jdev10133/j2ee/home/lib/pcl.jar (from system property java.class.path), by sun.misc.Launcher$AppClassLoader@17332331]     at oracle.classloader.SearchPolicy$FindLocal.getClass (SearchPolicy.java:167) [D:/Jdev10133/j2ee/home/lib/pcl.jar (from system property java.class.path), by sun.misc.Launcher$AppClassLoader@17332331]     at oracle.classloader.SearchSequence.getClass (SearchSequence.java:119) [D:/Jdev10133/j2ee/home/lib/pcl.jar (from system property java.class.path), by sun.misc.Launcher$AppClassLoader@17332331]     at oracle.classloader.SearchPolicy.loadClass (SearchPolicy.java:645) [D:/Jdev10133/j2ee/home/lib/pcl.jar (from system property java.class.path), by sun.misc.Launcher$AppClassLoader@17332331]     at oracle.classloader.PolicyClassLoader.askParentForClass (PolicyClassLoader.java:1289) [D:/Jdev10133/j2ee/home/lib/pcl.jar (from system property java.class.path), by sun.misc.Launcher$AppClassLoader@17332331]     at oracle.classloader.SearchPolicy$AskParent.getClass (SearchPolicy.java:68) [D:/Jdev10133/j2ee/home/lib/pcl.jar (from system property java.class.path), by sun.misc.Launcher$AppClassLoader@17332331]     at oracle.classloader.SearchSequence.getClass (SearchSequence.java:119) [D:/Jdev10133/j2ee/home/lib/pcl.jar (from system property java.class.path), by sun.misc.Launcher$AppClassLoader@17332331]     at oracle.classloader.PolicyClassLoader.internalLoadClass (PolicyClassLoader.java:1674) [D:/Jdev10133/j2ee/home/lib/pcl.jar (from system property java.class.path), by sun.misc.Launcher$AppClassLoader@17332331]     at oracle.classloader.PolicyClassLoader.loadClass (PolicyClassLoader.java:1635) [D:/Jdev10133/j2ee/home/lib/pcl.jar (from system property java.class.path), by sun.misc.Launcher$AppClassLoader@17332331]     at oracle.classloader.PolicyClassLoader.loadClass (PolicyClassLoader.java:1620) [D:/Jdev10133/j2ee/home/lib/pcl.jar (from system property java.class.path), by sun.misc.Launcher$AppClassLoader@17332331]     at java.lang.ClassLoader.loadClassInternal (ClassLoader.java:319) [jre bootstrap, by jre.bootstrap:1.5.0_06]     at java.lang.Class.forName0 (Native method) [unknown, by unknown]     at java.lang.Class.forName (Class.java:242) [jre bootstrap, by jre.bootstrap:1.5.0_06]     at java.sql.DriverManager.getCallerClass (DriverManager.java:442) [jre bootstrap, by jre.bootstrap:1.5.0_06]     at java.sql.DriverManager.getConnection (DriverManager.java:519) [jre bootstrap, by jre.bootstrap:1.5.0_06]     at java.sql.DriverManager.getConnection (DriverManager.java:171) [jre bootstrap, by jre.bootstrap:1.5.0_06]     at com.util.Util.getConnection (Util.java:14) [D:/Jdev10133/jdev/mywork/Trainning/DBProgramming/classes/ (from <classpath> in D:\Jdev10133\jdev\mywork\Trainning\DBProgramming\public_html), by current-workspace-app.web.dbprogram:0.0.0]     at com.blob.BLOBTest.uploadFileToDB (BLOBTest.java:37) [D:/Jdev10133/jdev/mywork/Trainning/DBProgramming/classes/ (from <classpath> in D:\Jdev10133\jdev\mywork\Trainning\DBProgramming\public_html), by current-workspace-app.web.dbprogram:0.0.0]     at com.upload.doPost (upload.java:28) [D:/Jdev10133/jdev/mywork/Trainning/DBProgramming/classes/ (from <classpath> in D:\Jdev10133\jdev\mywork\Trainning\DBProgramming\public_html), by current-workspace-app.web.dbprogram:0.0.0]     at javax.servlet.http.HttpServlet.service (HttpServlet.java:763) [D:/Jdev10133/j2ee/home/lib/servlet.jar (from <code-source> (ignore manifest Class-Path) in META-INF/boot.xml in D:\Jdev10133\j2ee\home\oc4j.jar), by api:1.4.0]     at javax.servlet.http.HttpServlet.service (HttpServlet.java:856) [D:/Jdev10133/j2ee/home/lib/servlet.jar (from <code-source> (ignore manifest Class-Path) in META-INF/boot.xml in D:\Jdev10133\j2ee\home\oc4j.jar), by api:1.4.0]     at com.evermind[Oracle Containers for J2EE 10g (10.1.3.3.0) ].server.http.ServletRequestDispatcher.invoke (ServletRequestDispatcher.java:713) [D:/Jdev10133/j2ee/home/lib/oc4j-internal.jar (from <code-source> in META-INF/boot.xml in D:\Jdev10133\j2ee\home\oc4j.jar), by oc4j:10.1.3]     at com.evermind[Oracle Containers for J2EE 10g (10.1.3.3.0) ].server.http.ServletRequestDispatcher.forwardInternal (ServletRequestDispatcher.java:370) [D:/Jdev10133/j2ee/home/lib/oc4j-internal.jar (from <code-source> in META-INF/boot.xml in D:\Jdev10133\j2ee\home\oc4j.jar), by oc4j:10.1.3]     at com.evermind[Oracle Containers for J2EE 10g (10.1.3.3.0) ].server.http.HttpRequestHandler.doProcessRequest (HttpRequestHandler.java:871) [D:/Jdev10133/j2ee/home/lib/oc4j-internal.jar (from <code-source> in META-INF/boot.xml in D:\Jdev10133\j2ee\home\oc4j.jar), by oc4j:10.1.3]     at com.evermind[Oracle Containers for J2EE 10g (10.1.3.3.0) ].server.http.HttpRequestHandler.processRequest (HttpRequestHandler.java:453) [D:/Jdev10133/j2ee/home/lib/oc4j-internal.jar (from <code-source> in META-INF/boot.xml in D:\Jdev10133\j2ee\home\oc4j.jar), by oc4j:10.1.3]     at com.evermind[Oracle Containers for J2EE 10g (10.1.3.3.0) ].server.http.HttpRequestHandler.serveOneRequest (HttpRequestHandler.java:221) [D:/Jdev10133/j2ee/home/lib/oc4j-internal.jar (from <code-source> in META-INF/boot.xml in D:\Jdev10133\j2ee\home\oc4j.jar), by oc4j:10.1.3]     at com.evermind[Oracle Containers for J2EE 10g (10.1.3.3.0) ].server.http.HttpRequestHandler.run (HttpRequestHandler.java:122) [D:/Jdev10133/j2ee/home/lib/oc4j-internal.jar (from <code-source> in META-INF/boot.xml in D:\Jdev10133\j2ee\home\oc4j.jar), by oc4j:10.1.3]     at com.evermind[Oracle Containers for J2EE 10g (10.1.3.3.0) ].server.http.HttpRequestHandler.run (HttpRequestHandler.java:111) [D:/Jdev10133/j2ee/home/lib/oc4j-internal.jar (from <code-source> in META-INF/boot.xml in D:\Jdev10133\j2ee\home\oc4j.jar), by oc4j:10.1.3]     at oracle.oc4j.network.ServerSocketReadHandler$SafeRunnable.run (ServerSocketReadHandler.java:260) [D:/Jdev10133/j2ee/home/lib/oc4j-internal.jar (from <code-source> in META-INF/boot.xml in D:\Jdev10133\j2ee\home\oc4j.jar), by oc4j:10.1.3]     at com.evermind[Oracle Containers for J2EE 10g (10.1.3.3.0) ].util.ReleasableResourcePooledExecutor$MyWorker.run (ReleasableResourcePooledExecutor.java:303) [D:/Jdev10133/j2ee/home/lib/oc4j-internal.jar (from <code-source> in META-INF/boot.xml in D:\Jdev10133\j2ee\home\oc4j.jar), by oc4j:10.1.3]     at java.lang.Thread.run (Thread.java:595) [jre bootstrap, by jre.bootstrap:1.5.0_06]
    Please help to suggest me. How should I do to let out this error?
    Thanks

    many people use the two interchangeably, though technically it can mean something different.
    What you get back from a call to newInstance() is the same as what you'd get when using the new keyword and no constructor arguments, a reference to an instance of a class (there are other ways to dynamically create an instance using other constructors).
    "Creating a class object" technically means loading the class which causes a Class instance (so an instance of the class Class) to be created for that particular class, making the class available to the JVM for instantiation of instances.
    newInstance() and its sisters are useful for when the class to be instantiated is not known (or even doesn't exist) when compiling the class that needs to instantiate it.
    This is of course the case with JDBC. The people creating the JVM can't know what driver classes will be out there at some point in the future (and if they did know and have access to all of them in the past it would still be foolish to have them all hardwired into the JVM).

  • Win2000+weblogic510+oracle8i,Could not load 'oracle.jdbc.driver.OracleDriver'

    &#26143;&#26399;&#22235; &#19977;&#26376; 23 20:30:17 GMT+08:00 2000:<E> <JDBC Pool>
    Failed to create connection pool "ejavaPool"
    weblogic.common.ResourceException: Could not load 'oracle.jdbc.driver.OracleDriver'
    because
    System.loadLibrary threw java.lang.UnsatisfiedLinkError
    with the message 'oracle.jdbc.driver.OracleDriver'.
    This could occur if the JDBC driver is not in the weblogic.class.path.
    If this is a type-2 JDBC driver, it may also indicate that
    the Driver native layers(DBMS client lib or driver DLL)
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    This is most likely caused by one of the following:
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