Problem using ojdbc14.jar in JDev 11g

Hi
I have an application created in 10g.
I was trying to create the same in 11g and encountered this problem with the ojdbc14.jar.
The jar has two classes OracleDataSource and OracleConnectionCacheImpl inside the same package.
OracleConnectionCacheImpl is inherited from OracleDataSource.
OracleDataSource has a protected variable called m_dataSourceName.
The child class, OracleConnectionCacheImpl used this variable.
I have this jar included in my classpath.
When i run the application, it throws a runtime error.
Following is the stack trace.
java.lang.NoSuchFieldError: m_dataSourceName
     at oracle.jdbc.pool.OracleConnectionCacheImpl.(OracleConnectionCacheImpl.java:189)
     at oracle.apps.snw.hubserver.common.XhubConnectionPool.(XhubConnectionPool.java:46) -------------------------------------> from here its my code
     at oracle.apps.snw.hubserver.common.XhubConnectionPoolManager.addConnectionPool(XhubConnectionPoolManager.java:168)
     at oracle.apps.snw.hubserver.common.XhubConnectionPoolManager.getConnection(XhubConnectionPoolManager.java:201)
     at oracle.apps.snw.hubserver.util.SystemParameters.reloadAllParameters(SystemParameters.java:294)
     at oracle.apps.snw.hubserver.util.SystemParameters.(SystemParameters.java:34)
     at oracle.apps.snw.hubserver.util.SystemParameters.getInstance(SystemParameters.java:48)
     at oracle.apps.snw.hubserver.common.XhubConnectionPoolManager.addConnectionPool(XhubConnectionPoolManager.java:155)
     at oracle.apps.snw.hubserver.common.XhubConnectionPoolManager.getConnection(XhubConnectionPoolManager.java:201)
     at oracle.apps.snw.common.util.LanguageQueryBasedNameValueCache.queryAllLanguages(LanguageQueryBasedNameValueCache.java:125)
     at oracle.apps.snw.common.util.LanguageQueryBasedNameValueCache.setCacheParameters(LanguageQueryBasedNameValueCache.java:77)
     at oracle.apps.snw.common.util.LanguageQueryBasedNameValueCache.(LanguageQueryBasedNameValueCache.java:53)
     at oracle.apps.snw.uicommon.TextProvider.populateTextCache(TextProvider.java:100)
     at oracle.apps.snw.uicommon.TextProvider.getTextMessage(TextProvider.java:123)
     at oracle.apps.snw.uicommon.TextProvider.handleGetObject(TextProvider.java:113)
     at java.util.ResourceBundle.getObject(ResourceBundle.java:378)
     at oracle.cabo.ui.data.BundleDataObject.selectValue(Unknown Source)
     at oracle.cabo.ui.data.DataBoundValue.getValue(Unknown Source)
     at oracle.cabo.ui.BaseUINode.getAttributeValueImpl(Unknown Source)
Can anyone tell me why this error occurs?
I have checked the Oracle JDBC library of JDev 11g and found that it has ojdbc6.jar
Is there any compatibility problem with this jar migrating from 10g to 11g?
Found this related link but could not relate it much.
Please explain
JDBC problem: java.lang.NoSuchFieldError: CONNECTION_PROPERTY_THIN_NET_CONN
Thanks

I guess you can't use ojdbc14.jar that easy. Some dependencies form ojdbc14.jar are not available under 11g. That 's the reason you have ojdbc6.jar under 11g.
Timo

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Problem using a jar file : java.lang.ClassNotFoundException: ApiConn

Hi everyone.
i am running a form that use a bean_area to call a jar.
but i am getting this error, thanks in advnce for any tip.
Java Plug-in 1.6.0_33
Using JRE version 1.6.0_33-b05 Java HotSpot(TM) Client VM
User home directory = C:\Users\user1
c: clear console window
f: finalize objects on finalization queue
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m: print memory usage
o: trigger logging
q: hide console
r: reload policy configuration
s: dump system and deployment properties
t: dump thread list
v: dump thread stack
x: clear classloader cache
0-5: set trace level to <n>
java.lang.ClassNotFoundException: ApiConn
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Dumping class loader cache...
Live entry: key=http://192.168.10.100:7778/forms/java/,frmall.jar,siberia_jpg.jar,ApiConn.jar,Hasher.jar,ReadCommand.jar,WriteCommand.jar,libAPI.jar, refCount=1, threadGroup=sun.plugin2.applet.Applet2ThreadGroup[name=http://192.168.10.100:7778/forms/java/-threadGroup,maxpri=4]
Done.
in my form i have created a bean_area and used as implementation class :ApiConn
in my formsweb.cfg i used this configuration: archive=frmall.jar,siberia_jpg.jar,ApiConn.jar,Hasher.jar,ReadCommand.jar,WriteCommand.jar,libAPI.jar
in my forms/java i have placed my jar files listed in the frmall.jar
i guess i am missing something but i dont know what it is.
here is my ApiConn.java from wich i generate my jar file:
package libAPI;
* This contains connection. Everything should be here,
* should operate with this class only
import java.io.*;
import java.net.*;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.logging.Level;
import java.util.logging.Logger;
* @author janisk
public class ApiConn extends Thread {
private Socket sock = null;
private DataOutputStream out = null;
private DataInputStream in = null;
private String ipAddress;
private int ipPort;
private boolean connected = false;
private String message = "Not connected";
private ReadCommand readCommand = null;
private WriteCommand writeCommand = null;
private Thread listener = null;
LinkedBlockingQueue queue = new LinkedBlockingQueue(40);
* Constructor of the connection class
* @param ipAddress - IP address of the router you want to conenct to
* @param ipPort - port used for connection, ROS default is 8728
public ApiConn(String ipAddress, int ipPort) {
this.ipAddress = ipAddress;
this.ipPort = ipPort;
this.setName("settings");
* State of connection
* @return - if connection is established to router it returns true.
public boolean isConnected() {
return connected;
public void disconnect() throws IOException{
listener.interrupt();
sock.close();
private void listen() {
if (this.isConnected()) {
if (readCommand == null) {
readCommand = new ReadCommand(in, queue);
listener = new Thread(readCommand);
listener.setDaemon(true);
listener.setName("listener");
listener.start();
* to get IP address of the connection. Reads data from socket created.
* @return InetAddress
public InetAddress getIpAddress() {
return sock == null ? null : sock.getInetAddress();
* returns ip address that socket is asociated with.
* @return InetAddress
public InetAddress getLocalIpAddress() {
return sock == null ? null : sock.getLocalAddress();
* Socket remote port number
* @return
public int getPort() {
return sock == null ? null : sock.getPort();
* return local prot used by socket
* @return
public int getLocalPort() {
return sock == null ? null : sock.getLocalPort();
* Returns status message set up bu class.
* @return
public String getMessage() {
return message;
* sets and exectues command (sends it to RouterOS host connected)
* @param s - command will be sent to RouterOS for example "/ip/address/print\n=follow="
* @return
public String sendCommand(String s) {
return writeCommand.setCommand(s).runCommand();
* exeecutes already set command.
* @return returns status of the command sent
public String runCommand() {
return writeCommand.runCommand();
* Tries to fech data that is repllied to commands sent. It will wait till it can return something.
* @return returns data sent by RouterOS
* @throws java.lang.InterruptedException
public String getData() throws InterruptedException {
String s = (String) queue.take();
return s;
* returns command that is set at this moment. And will be exectued if runCommand is exectued.
* @return
public String getCommand() {
return writeCommand.getCommand();
* set up method that will log you in
* @param name - username of the user on the router
* @param password - password for the user
* @return
public String login(String name, char[] password) {
this.sendCommand("/login");
String s = "a";
try {
s = this.getData();
} catch (InterruptedException ex) {
Logger.getLogger(ApiConn.class.getName()).log(Level.SEVERE, null, ex);
return "failed read #1";
if (!s.contains("!trap") && s.length() > 4) {
String[] tmp = s.trim().split("\n");
if (tmp.length > 1) {
tmp = tmp[1].split("=ret=");
s = "";
String transition = tmp[tmp.length - 1];
String chal = "";
chal = Hasher.hexStrToStr("00") + new String(password) + Hasher.hexStrToStr(transition);
chal = Hasher.hashMD5(chal);
String m = "/login\n=name=" + name + "\n=response=00" + chal;
s = this.sendCommand(m);
try {
s = this.getData();
} catch (InterruptedException ex) {
Logger.getLogger(ApiConn.class.getName()).log(Level.SEVERE, null, ex);
return "failed read #2";
if (s.contains("!done")) {
if (!s.contains("!trap")) {
return "Login successful";
return "Login failed";
@Override
public void run() {
try {
InetAddress ia = InetAddress.getByName(ipAddress);
if (ia.isReachable(1000)) {
sock = new Socket(ipAddress, ipPort);
in = new DataInputStream(sock.getInputStream());
out = new DataOutputStream(sock.getOutputStream());
connected = true;
readCommand = new ReadCommand(in, queue);
writeCommand = new WriteCommand(out);
this.listen();
message = "Connected";
} else {
message = "Not reachable";
} catch (UnknownHostException ex) {
connected = false;
message = ex.getMessage();
ex.printStackTrace();
} catch (IOException ex) {
connected = false;
message = ex.getMessage();
ex.printStackTrace();
}

I need your help again, i think this is a minor thing.
i have compiled the class file that i needed and i signed it too. but now it is giving me a new error and need your tip.
here is the java console loyout and my java file ((i think here is the problem in java file, something must be missing)).
thanks in advance for any help.
Java Plug-in 10.17.2.02
Using JRE version 1.7.0_17-b02 Java HotSpot(TM) Client VM
User home directory = C:\Users\Administrator
c: clear console window
f: finalize objects on finalization queue
g: garbage collect
h: display this help message
l: dump classloader list
m: print memory usage
o: trigger logging
q: hide console
r: reload policy configuration
s: dump system and deployment properties
t: dump thread list
v: dump thread stack
x: clear classloader cache
0-5: set trace level to <n>
network: Connecting http://192.168.10.100:7778/forms/lservlet;jsessionid=c0a80a6430d6e191eded93774f2f8d1bed73056e66ef.e3mObhiMbxeKe34PahiKbx4Nbh90n6jAmljGr5XDqQLvpAe with proxy=DIRECT
security: Validate the certificate chain using CertPath API
security: The certificate hasnt been expired, no need to check timestamping info
security: Cannot find jurisdiction list file
security: The CRL support is disabled
security: The OCSP support is disabled
security: This OCSP End Entity validation is disabled
security: Checking if certificate is in Deployment denied certificate store
security: Checking if certificate is in Deployment permanent certificate store
basic: updateValidationResultsForApplet update
cache: Mark prevalidated: http://192.168.10.100:7778/forms/java/ApiConn.jar true tm=1363335797289 cert=1371107987000
basic: Plugin2ClassLoader.getPermissions CeilingPolicy allPerms
java.lang.InstantiationException: oracle.forms.siberia.ApiConn
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     at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
     at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
     at java.awt.EventDispatchThread.run(Unknown Source)
network: Connecting http://192.168.10.100:7778/forms/lservlet;jsessionid=c0a80a6430d6e191eded93774f2f8d1bed73056e66ef.e3mObhiMbxeKe34PahiKbx4Nbh90n6jAmljGr5XDqQLvpAe with proxy=DIRECT
Exception in thread "Forms-DialogThread2" java.lang.NullPointerException
     at oracle.forms.handler.JavaContainer.onDestroy(Unknown Source)
     at oracle.forms.engine.Runform.destroyHandlers(Unknown Source)
     at oracle.forms.handler.DialogThread.doAlert(Unknown Source)
     at oracle.forms.handler.DialogThread.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)
Dumping class loader cache...
Live entry: key=http://192.168.10.100:7778/forms/java/,frmall.jar,siberia_jpg.jar,ApiConn.jar,ConcealTextField.jar, refCount=1, threadGroup=sun.plugin2.applet.Applet2ThreadGroup[name=http://192.168.10.100:7778/forms/java/-threadGroup,maxpri=4]
Done.
here is my java file
* To change this template, choose Tools | Templates
* and open the template in the editor.
package oracle.forms.siberia;
* This contains connection. Everything should be here,
* should operate with this class only
import java.io.*;
import java.net.*;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.logging.Level;
import java.util.logging.Logger;
import oracle.forms.*;
* @author janisk
public class ApiConn extends Thread {
private Socket sock = null;
private DataOutputStream out = null;
private DataInputStream in = null;
private String ipAddress;
private int ipPort;
private boolean connected = false;
private String message = "Not connected";
private ReadCommand readCommand = null;
private WriteCommand writeCommand = null;
private Thread listener = null;
LinkedBlockingQueue queue = new LinkedBlockingQueue(40);
* Constructor of the connection class
* @param ipAddress - IP address of the router you want to conenct to
* @param ipPort - port used for connection, ROS default is 8728
public ApiConn(String ipAddress, int ipPort) {
this.ipAddress = ipAddress;
this.ipPort = ipPort;
this.setName("settings");
* State of connection
* @return - if connection is established to router it returns true.
public boolean isConnected() {
return connected;
public void disconnect() throws IOException{
listener.interrupt();
sock.close();
private void listen() {
if (this.isConnected()) {
if (readCommand == null) {
readCommand = new ReadCommand(in, queue);
listener = new Thread(readCommand);
listener.setDaemon(true);
listener.setName("listener");
listener.start();
* to get IP address of the connection. Reads data from socket created.
* @return InetAddress
public InetAddress getIpAddress() {
return sock == null ? null : sock.getInetAddress();
* returns ip address that socket is asociated with.
* @return InetAddress
public InetAddress getLocalIpAddress() {
return sock == null ? null : sock.getLocalAddress();
* Socket remote port number
* @return
public int getPort() {
return sock == null ? null : sock.getPort();
* return local prot used by socket
* @return
public int getLocalPort() {
return sock == null ? null : sock.getLocalPort();
* Returns status message set up bu class.
* @return
public String getMessage() {
return message;
* sets and exectues command (sends it to RouterOS host connected)
* @param s - command will be sent to RouterOS for example "/ip/address/print\n=follow="
* @return
public String sendCommand(String s) {
return writeCommand.setCommand(s).runCommand();
* exeecutes already set command.
* @return returns status of the command sent
public String runCommand() {
return writeCommand.runCommand();
* Tries to fech data that is repllied to commands sent. It will wait till it can return something.
* @return returns data sent by RouterOS
* @throws java.lang.InterruptedException
public String getData() throws InterruptedException {
String s = (String) queue.take();
return s;
* returns command that is set at this moment. And will be exectued if runCommand is exectued.
* @return
public String getCommand() {
return writeCommand.getCommand();
* set up method that will log you in
* @param name - username of the user on the router
* @param password - password for the user
* @return
public String login(String name, char[] password) {
this.sendCommand("/login");
String s = "a";
try {
s = this.getData();
} catch (InterruptedException ex) {
Logger.getLogger(ApiConn.class.getName()).log(Level.SEVERE, null, ex);
return "failed read #1";
if (!s.contains("!trap") && s.length() > 4) {
String[] tmp = s.trim().split("\n");
if (tmp.length > 1) {
tmp = tmp[1].split("=ret=");
s = "";
String transition = tmp[tmp.length - 1];
String chal = "";
chal = Hasher.hexStrToStr("00") + new String(password) + Hasher.hexStrToStr(transition);
chal = Hasher.hashMD5(chal);
String m = "/login\n=name=" + name + "\n=response=00" + chal;
s = this.sendCommand(m);
try {
s = this.getData();
} catch (InterruptedException ex) {
Logger.getLogger(ApiConn.class.getName()).log(Level.SEVERE, null, ex);
return "failed read #2";
if (s.contains("!done")) {
if (!s.contains("!trap")) {
return "Login successful";
return "Login failed";
@Override
public void run() {
try {
InetAddress ia = InetAddress.getByName(ipAddress);
if (ia.isReachable(1000)) {
sock = new Socket(ipAddress, ipPort);
in = new DataInputStream(sock.getInputStream());
out = new DataOutputStream(sock.getOutputStream());
connected = true;
readCommand = new ReadCommand(in, queue);
writeCommand = new WriteCommand(out);
this.listen();
message = "Connected";
} else {
message = "Not reachable";
} catch (UnknownHostException ex) {
connected = false;
message = ex.getMessage();
ex.printStackTrace();
} catch (IOException ex) {
connected = false;
message = ex.getMessage();
ex.printStackTrace();
}

Dynamic class loading problem using unknown JAR archive and directory names

I read the following article, which enlightened me a lot:
Ted Neward: Understanding Class.forName().
However, it took me some while to understand that my problem is the other way around:
I know the name of the class, I know the name of the method,
but my program/JVM does not know where to load the classes from.
Shortly, my problem is that the server engine that I am writing
uses two different versions of the same library.
So I am trying out the following solution:
My program is named TestClassPathMain.java
Assume the two libraries are named JAR1.jar and JAR2.jar
and the class/instance method that should
be exposed to TestClassPathMain.java by them is named
TestClass1.testMethod().
As long as I was depending on just one library,
I put JAR1.jar in the classpath before starting java,
and I was happy for a while.
At the moment I got the need to use another version of
TestClass1.testMethod() packaged in JAR2.jar,
a call would always access JAR1.jar's
TestClass1.testMethod().
I then decided to remove JAR1.jar from the classpath,
and programmatically define two separate ClassLoaders, one for use
with JAR1.jar and the other for use with JAR2.jar.
However, the problem is only partly solved.
Please refer to the enclosed code for details.
(The code in the JAR1.jar/JAR2.jar is extremely simple,
it just tells (by hardcoding) the name of the jar it is packaged in
and instantiates another class packaged in the same jar using
the "new" operator and calls a method on it. I don't enclose it.)
The TestClassPathMain.java/UC1.java/UC2.java code suite was
successfully compiled with an arbitrary of JAR1 or JAR2 in the classpath,
however removed from the classpath at runtime.
(I know that this could have been done (more elegantly...?) by producing an Interface,
but I think the main problem principle is still untouched by this potential lack of elegancy(?))
1) This problem should not be unknown to you experts out there,
how is it generally and/or most elegantly solved?
The "*** UC2: Variant 2" is the solution I would like best, had it only worked.
2) And why arent "*** UC2: Variant 2" and
"*** static UC2: Variant 2" working,
while "*** Main: Variant 2" is?
3) And a mal-apropos:
Why can't I catch the NoClassDefFoundError?
The output:
*** Main: Variant 1 JAR 1 ***:
Entering TestClass1.testMethod() packaged in JAR1.jar
About to instantiate TestClass2 with the new operator
About to call TestClass2.testMethod()
Entering TestClass2.testMethod() packaged in JAR1.jar
*** Main: Variant 1 JAR 2 ***:
Entering TestClass1.testMethod() packaged in JAR2.jar
About to instantiate TestClass2 with the new operator
About to call TestClass2.testMethod()
Entering TestClass2.testMethod() packaged in JAR2.jar
*** Main: Variant 2 JAR 1 ***:
Entering TestClass1.testMethod() packaged in JAR1.jar
About to instantiate TestClass2 with the new operator
About to call TestClass2.testMethod()
Entering TestClass2.testMethod() packaged in JAR1.jar
*** Main: Variant 2 JAR 2 ***:
Entering TestClass1.testMethod() packaged in JAR2.jar
About to instantiate TestClass2 with the new operator
About to call TestClass2.testMethod()
Entering TestClass2.testMethod() packaged in JAR2.jar
*** UC1: Variant 1 JAR 1 ***:
Entering TestClass1.testMethod() packaged in JAR1.jar
About to instantiate TestClass2 with the new operator
About to call TestClass2.testMethod()
Entering TestClass2.testMethod() packaged in JAR1.jar
*** UC1: Variant 1 JAR 2 ***:
Entering TestClass1.testMethod() packaged in JAR2.jar
About to instantiate TestClass2 with the new operator
About to call TestClass2.testMethod()
Entering TestClass2.testMethod() packaged in JAR2.jar
*** static UC2: Variant 2 JAR 1 ***:
Exception in thread "main" java.lang.NoClassDefFoundError: TestClass1
        at UC2.runFromJarVariant2_static(UC2.java:56)
        at TestClassPathMain.main(TestClassPathMain.java:52)
TestClassPathMain.java
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLClassLoader;
public class TestClassPathMain {
    public static void main(final String args[]) throws MalformedURLException, ClassNotFoundException, InstantiationException, SecurityException, NoSuchMethodException, IllegalArgumentException, IllegalAccessException, InvocationTargetException {
            // Commented out because I cannot catch the NoClassDefFoundError.
            // Why?
            try {
                final TestClass1 testClass1 = new TestClass1();
                System.out.println(
                    "\nThe class TestClass1 is of some unexplicable reason available." +
                    "\nFor the purpose of the test, it shouldn't have been!" +
                    "\nExiting");
                System.exit(1);
            } catch (NoClassDefFoundError e) {
                System.out.println("\nPositively confirmed that the class TestClass1 is not available:\n" + e);
                System.out.println("\n\nREADY FOR THE TEST: ...");
            // Works fine
            System.out.println("\n*** Main: Variant 1 JAR 1 ***:");
            runFromJarVariant1("file:/W:/java/eclipse/workspaces/simped_test/CP1/JAR1.jar");
            System.out.println("\n*** Main: Variant 1 JAR 2 ***:");
            runFromJarVariant1("file:/W:/java/eclipse/workspaces/simped_test/CP2/JAR2.jar");
            // Works fine
            System.out.println("\n*** Main: Variant 2 JAR 1 ***:");
            runFromJarVariant1("file:/W:/java/eclipse/workspaces/simped_test/CP1/JAR1.jar");
            System.out.println("\n*** Main: Variant 2 JAR 2 ***:");
            runFromJarVariant1("file:/W:/java/eclipse/workspaces/simped_test/CP2/JAR2.jar");
            // Works fine
            final UC1 uc1 = new UC1();
            System.out.println("\n*** UC1: Variant 1 JAR 1 ***:");
            uc1.runFromJarVariant1("file:/W:/java/eclipse/workspaces/simped_test/CP1/JAR1.jar");
            System.out.println("\n*** UC1: Variant 1 JAR 2 ***:");
            uc1.runFromJarVariant1("file:/W:/java/eclipse/workspaces/simped_test/CP2/JAR2.jar");
            // Crashes
            System.out.println("\n*** static UC2: Variant 2 JAR 1 ***:");
            UC2.runFromJarVariant2_static("file:/W:/java/eclipse/workspaces/simped_test/CP1/JAR1.jar");
            System.out.println("\n*** static UC2: Variant 2 JAR 2 ***:");
            UC2.runFromJarVariant2_static("file:/W:/java/eclipse/workspaces/simped_test/CP2/JAR2.jar");
            // Crashes
            final UC2 uc2 = new UC2();
            System.out.println("\n*** UC2: Variant 2 JAR 1 ***:");
            uc2.runFromJarVariant2("file:/W:/java/eclipse/workspaces/simped_test/CP1/JAR1.jar");
            System.out.println("\n*** UC2: Variant 2 JAR 2 ***:");
            uc2.runFromJarVariant2("file:/W:/java/eclipse/workspaces/simped_test/CP2/JAR2.jar");
    private static void runFromJarVariant1(final String jarFileURL)
        throws MalformedURLException,
               ClassNotFoundException,
               InstantiationException,
               IllegalArgumentException,
               IllegalAccessException,
               InvocationTargetException,
               SecurityException,
               NoSuchMethodException {
        final URL url = new URL(jarFileURL);
        final URLClassLoader cl =
            new URLClassLoader(new URL[]{url},
                               Thread.currentThread().getContextClassLoader());
        final Class clazz = cl.loadClass("TestClass1");
        final Object testClass1 = clazz.newInstance();
        final Method testMethod1 = clazz.getMethod("testMethod", null);
        testMethod1.invoke(testClass1, null);
    private static void runFromJarVariant2(final String jarFileURL)
        throws MalformedURLException,
               ClassNotFoundException,
               InstantiationException,
               IllegalArgumentException,
               IllegalAccessException,
               InvocationTargetException,
               SecurityException,
               NoSuchMethodException {
        final URL url = new URL(jarFileURL);
        final URLClassLoader cl =
            new URLClassLoader(new URL[]{url},
                               Thread.currentThread().getContextClassLoader());
        final Class clazz = cl.loadClass("TestClass1");
        final TestClass1 testClass1 = new TestClass1();
        testClass1.testMethod();
UC1.java
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLClassLoader;
public class UC1 {
    public void runFromJarVariant1(final String jarFileURL)
        throws MalformedURLException,
               ClassNotFoundException,
               InstantiationException,
               IllegalArgumentException,
               IllegalAccessException,
               InvocationTargetException,
               SecurityException,
               NoSuchMethodException {
        final URL url = new URL(jarFileURL);
        final URLClassLoader cl =
            new URLClassLoader(new URL[]{url},
                               Thread.currentThread().getContextClassLoader());
        final Class clazz = cl.loadClass("TestClass1");
        final Object testClass1 = clazz.newInstance();
        final Method testMethod1 = clazz.getMethod("testMethod", null);
        testMethod1.invoke(testClass1, null);
UC2.java
import java.lang.reflect.InvocationTargetException;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLClassLoader;
public class UC2 {
    public void runFromJarVariant2(final String jarFileURL)
    throws MalformedURLException,
           ClassNotFoundException,
           InstantiationException,
           IllegalArgumentException,
           IllegalAccessException,
           InvocationTargetException,
           SecurityException,
           NoSuchMethodException {
        final URL url = new URL(jarFileURL);
        final URLClassLoader cl =
            new URLClassLoader(new URL[]{url},
                               Thread.currentThread().getContextClassLoader());
        final Class clazz = cl.loadClass("TestClass1");
        final TestClass1 testClass1 = new TestClass1();
        testClass1.testMethod();
     * Identic to the "runFromJarVariant2" method,
     * except that it is static
    public static void runFromJarVariant2_static(final String jarFileURL)
    throws MalformedURLException,
           ClassNotFoundException,
           InstantiationException,
           IllegalArgumentException,
           IllegalAccessException,
           InvocationTargetException,
           SecurityException,
           NoSuchMethodException {
        final URL url = new URL(jarFileURL);
        final URLClassLoader cl =
            new URLClassLoader(new URL[]{url},
                               Thread.currentThread().getContextClassLoader());
        final Class clazz = cl.loadClass("TestClass1");
        final TestClass1 testClass1 = new TestClass1();
        testClass1.testMethod();
}

2. i need to load the class to the same JVM (i.e. to
the same environment) of the current running
aplication, so that when the loaded class is run, it
would be able to invoke methods on it!!!
ClassLoader(s) do this. Try the URLClassLoader.
(I was talking about relatively esoteric "security"
issues when I mentioned the stuff about Class objects
"scope".) You might use the URLClassLoader kind of
like this.
Pseudo-code follows:
// setup the class loader
URL[] urls = new URL[1];
urls[0] = new URL("/path/to/dynamic/classes");
URLClassLoader ucl = new URLClassLoader(urls);
// load a class & use make an object with the default constructor
Object tmp = ucl.loadClass("dynamic.class.name").newInstance();
// Cast the object to a know interface so that you can use it.
// This may be used to further determine which interface to cast
// the class to. Or it may simply be the interface to which all
// dynamic classes have to conform in your program.
InterfaceImplementedByDynamicClass loadedObj =
    (InterfaceImplementedByDynamicClass)tmp;It's really not as hard as it sounds, just write a little test of
this and you will see how it works.

Problem using external jars in my java component

Hi Guys,
I just wanted to ask how to properly reference an external jar to a java dc. I already have an external library dc which contains my external jars and also compilation and assembly public parts, a j2ee library which has the assembly public part of the external jars that is deployed to the server, a java dc which has the compilation public part of the external jar.
My problem is whenever I trigger a method of the java dc in my webdynpro dc I'm having an exception. weird thing is when I put the whole method from the java dc to the webdnypro dc it functions well. So I'm thinking if the interaction between my java dc and j2ee lib dc has to do with this maybe I'm missing some configuration.
need your insight on this one.
Thanks,

Hi TznHuang,
Pleaserefer to this blog might helpful for you
/people/raphael.vogel/blog/2008/05/05/how-to-use-external-libraries-in-the-sap-component-model-part-ii
Also please build external DC and then sync sorurces and sync used DC from inactive DC TAB for DC where you have used
external DC.
Hope bit helps
Regards
Arun Jaiswal

Problem using Jcalendar.jar

I have put the jar file in /9idshome/forms90/java
After that I added the .jar file name to archive_jini and archive parameters at /forms90/server/formsweb.cfg
restarted the oc4 instance .
But when I run the form having the bean the the browser hangs showing loading applet
The same happens with the calendar.jar for jinitiator 1.3.8 also
pease help

follwing u i got the form jcalendar.fmb running but the button(show calendar) not working. Please find herewith the dignostics
Using JRE version 1.3.1.9 Java HotSpot(TM) Client VM
JAR cache enabled
Location: C:\Documents and Settings\Administrator.OPTCL-Q6WNMXIM3\Oracle Jar Cache
Maximum size: 50 MB
Compression level: 0
Loading http://gf:8889/forms90/webutil/webutil.jar from JAR cache
Loading http://gf:8889/forms90/webutil/jacob.jar from JAR cache
Loading http://gf:8889/forms90/java/f90all_jinit.jar from JAR cache
RegisterWebUtil - Loading Webutil Version 1.0.2 Beta
Loading http://gf:8889/forms90/java/JCalendarJinit.jar from JAR cache
Loading http://gf:8889/forms90/java/jcalendar.jar from JAR cache
connectMode=HTTP, native.
Forms Applet version is : 90290
java.lang.ClassNotFoundException: java.io.IOException: open HTTP connection failed.     at sun.applet.AppletClassLoader.getBytes(Unknown Source)
     at sun.applet.AppletClassLoader.access$100(Unknown Source)
     at sun.applet.AppletClassLoader$1.run(Unknown Source)
......so on
Please help

Securing a 1.5 web service using J2EE security and JDev 11g

Hello,
I'm looking for a tutorial or similar that will help me create a secure (1.5 EE with annotations) web service. I'm interested in just the development view at this point - xml file mods, etc.
I did find a good resource on how to do this in 10.1:
http://www.oracle.com/technology/products/jdev/101/howtos/securews/index.html
and am wondering if it has been updated (even beta!) or in another form.
Thanks

Steve,
The WSDLBaseURL property just prepends a string to the WSDL URL property so that you can abstract out the protocol, server and port values separately depending on the target system you wish to hit for the service call.
Regards,
Sam

Ojdbc14.jar not integrated in JDev 9.0.5.x?

Hi,
the documentation of Oracle 9i DB says, there is a new archiv for the jdbc driver: ojdbc14.jar. Until now we used classes12.zip (or classes12.jar).
But why is the new driver lib missing in JDev 9.0.5.x?
Best regards,
Torsten.

Can you please recommend some way to use ojdbc14.jar with JDeveloper 9.0.5.2? Ommitting Oracle JDBC from the project libraries and including a new library for ojdbc14.jar does not work for all classpath issues, such as for data source definitions in the data-sources.xml file. What does seem to work is replacing jdbc/lib/classes12dms.jar with ojdbc14.jar but I'm not sure if this will cause strange side effects. Is there any cleaner way of using ojdbc14.jar?
Thanks,
Jeff

Is ojdbc14.jar the correct driver to use with Java 1.6.0 and Oracle 10?

I have a customer using Oracle 10.2.0.3 and a JVM of 1.6.0. They are using ojdbc14.jar as their JDBC driver. I am confused because while ojdbc14.jar is listed as the driver for Oracle 10.2.0.3, it is not listed as compatible with JDK1.6.

the 14 part means it is for Java 1.4. You should use a driver from either the ODJBC5 (Java 5) or OJDBC6 range (Java 6). All drivers are backwards compatible, so you can use the latest drivers to connect with older Oracle releases. Just don't assume that the latest one is the best one, check Google for specific problems before using a specific driver release.

Problem using ojdbc14.jar in JDev 11g

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