Java Program Not Running

Hi,
I have a small Java program that imports Oracle.sql.* and Oracle.jdbc.*.
It establishes a default connection and converts a String[ ] to Oracle.sql.ARRAY type.
As per Oracle documentation, I have added paths of required .zip files in CLASSPATH variable.
Though I am able to compile the code, but when I try to run it thru java, it gives me error:
Exception in Thread "main" java.lang.NoClassDefFoundError: TestInstallJDBC
The .java and .class files are in current directory and I'm using
java TestInstallJDBC.
What can be the problem?
Any help is appreciated.
Thanks

Ah, I re-read your first post - you said you added paths to the Classpath. So you need to add . to your Classpath as well. For Windows .;<existing_classpath> or for Unix .:<existing_classpath>

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Java program not running by the Ant

i have a small java program.
its a classpath problem.
cant figure out where is the problem.
i am running the code via Ant.
build.xml
<?xml version="1.0"?>
<project name="myproject" basedir="." default="all">
    <property name="src.dir"     value="src"/>
     <property name="classes.dir" value="classes"/>
     <property name="lib.dir"     value="C:/tomcat/webapps/axis/WEB-INF/lib"/>
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     <target name="all" depends="clean,compile"/>
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</javac>
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          <fileset dir="${lib.dir}">
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          </classpath>
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</target>
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ant runand got this
Buildfile: build.xml
compile:
run:
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     [java]     at org.apache.tools.ant.taskdefs.ExecuteJava.execute(ExecuteJava
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     [java]     at org.apache.tools.ant.taskdefs.Java.run(Java.java:710)
     [java]     at org.apache.tools.ant.taskdefs.Java.executeJava(Java.java:178)
     [java]     at org.apache.tools.ant.taskdefs.Java.execute(Java.java:84)
     [java]     at org.apache.tools.ant.UnknownElement.execute(UnknownElement.ja
va:275)
     [java]     at org.apache.tools.ant.Task.perform(Task.java:364)
     [java]     at org.apache.tools.ant.Target.execute(Target.java:341)
     [java]     at org.apache.tools.ant.Target.performTasks(Target.java:369)
     [java]     at org.apache.tools.ant.Project.executeSortedTargets(Project.jav
a:1216)
     [java]     at org.apache.tools.ant.Project.executeTarget(Project.java:1185)
     [java]     at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(De
faultExecutor.java:40)
     [java]     at org.apache.tools.ant.Project.executeTargets(Project.java:1068
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BUILD SUCCESSFUL
Total time: 2 secondsso, code is not running......its dfinitely a classpath problem , because error message says "Could not find TestClient. Make sure you have it in your classpat".
TestClient is the name of main class file.
not sure whats wrong with this build.xml ? whats wrong in it ?
one thing , i guess, i did not mention "." , current directory in the build.xml ......is it because of that ?
i browsed apache manual......To Run a Java program.....first, they are making a JAR file ...and then they are executing the JAR.
i really, dont need the JAR file......i just want to run it.....thats enough.
somewhere, i have to do some modification in this buld.xml.......do you have any idea ?
thank you

TestClient folder has
1)src
2)classes
3)build.xml
i have posted the build.xml already.
now, src folder has TestClient.java
TestClient.java
==================
import org.apache.axis.client.Call;
import org.apache.axis.client.Service;
import javax.xml.namespace.QName;
public class TestClient {
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     try {
       String endpoint =
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       Service service = new Service();
       Call     call    = (Call) service.createCall();
       call.setTargetEndpointAddress( new java.net.URL(endpoint) );
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     } catch (Exception e) {
       System.err.println(e.toString());
}and i did
ant runand i got those errors.
clearly, its not able to run it.
looked the manual....did not find anything special about java task....still not working.

Can a java program be run in the background?

Hi all,
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I'm the administrator of all the computers. Then as I said there are commercial applications that do that.
Presumably you expect a problem now. And implementing an acceptable solution is going to take you months. Because not only need to 'hide' the application, you also need to set up all the monitoring and logging capability. And the first will require quite a bit of JNI work along with testing (in particular as it could interfer with existing applications on the users computers.)
I need to
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Java will not run in IE9

I find this problem posted all over the internet -- however, I have found few answers and no solutions that work.
Java will not run in IE9
In the last three days I have installed Java 7.5 at least five times (after total uninstalls).
I have Windows 7 Home premium with all updates installed. Anti-virus programs are installed.
Even the java website http://www.java.com/en/download/testjava.jsp cannot detect the Java program in IE9. It displays the following message: “No working Java was detected
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I know you don’t want to hear about other browsers, however, this is part of the diagnoses – Java works fine in Chrome. (Obviously, there are some programs that can only be accessed in IE.)
I have tried turning off the firewall, anti-virus AVG, active x filtering, and every other program. I have cleared the browsing history, cookies, etc. 50 times = nothing works.
I experienced that Java did work once and only once in IE9 after each of two new reinstallations of Java 7.5.
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Hi,
Have you tried the compatibility mode in Internet Explorer 9? Or does this issue occur to previous Internet Explorer versions?
For reference about compatibility mode:
http://blogs.msdn.com/b/ie/archive/2010/10/19/testing-sites-with-browser-mode-vs-doc-mode.aspx
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2. Next, select the Security Tab, and select the "Custom Level" button
3. Scroll down to "Scripting of Java applets"
4. Make sure the "Enable" radio button is checked.
5. Click OK to save your preference.
Or you could try to change the settings in group editor:
Computer Configuration\Administrative Templates\Windows Components\Internet Explorer\Internet Control Panel\Security Page\Internet Zone\Java Permissions
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Hope this helps.
Vincent Wang
TechNet Community Support

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How to find that a java program is running for the first time on daily basi

it is like this
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Pls share ur ideas

san.kumar wrote:
it is like this
1. i will ran a java program every day and i have to find that it is running for the first time(as i may stop that program and may run again the same day )
Pls share ur ideasAs kajbj said - you need to store a token / file with a run date on the file system. Each time the application runs, have it compare with the date from this file with the current date. If different, it's the first run of the day. If not, it is not the first run of the day. Each time have it update the date on the file.

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Hi DrClap,
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xiarce - I haven't heard anything regarding this, but I'll bring it up. Thanks.
Edited by: user4170063 on Apr 13, 2011 2:25 PM

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I am trying to run java in my Firefox 3.6.13 browser.
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import java.util.Properties;
import javax.mail.Address;
import javax.mail.Message;
import javax.mail.MessagingException;
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import javax.mail.Transport;
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Properties are case sensitive. Furthermore, you need to look-up on google for the right properties (TLS and so on).
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32 bit compiled Java Program not connecting to 64 bit Oracle 11g

Hi,
I am using one java program to connect to Oracle 11g (64 bit version) using Oracle10g 32 bit client libraries using OCI calls. Below is the program. If I compile it using 64 bit Oracle 10g libraries ($ORACLE_HOME/lib and $ORACLE_HOME/rdbms/lib) , it perfectly connects to Oracle11g but when i compile it using $ORACLE_HOME/lib32 and $ORACLE_HOME/rdbms/lib32, it hangs and keeps trying and takes 100% cpu usage. it does nothing. Please suggest what is going wrong in the environment.
============================
import java.sql.*;
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================================================

>
I am compiling like when LD_LIBRARY_PATH set to $ORACLE_HOME/lib32:$ORACLE_HOME/rdbms/lib32.
javac -cp .:$ORACLE_HOME/jdbc/lib/ojdbc14.jar dbAccess.java
as my program resides in current directory. I run it like :
java -cp .:$ORACLE_HOME/jdbc/lib/ojdbc14.jar dbAccess
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I am compiling like when LD_LIBRARY_PATH set to $ORACLE_HOME/lib:$ORACLE_HOME/rdbms/lib
javac -cp .:$ORACLE_HOME/jdbc/lib/ojdbc14.jar dbAccess.java
as my program resides in current directory. I run it like :
java -cp .:$ORACLE_HOME/jdbc/lib/ojdbc14.jar dbAccess
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>
The ojdbc14.jar file is for use with Java 1.4 VMs.
Are you still using Java 1.4? If so, why?
For Oracle 11g you should be using the latest JDBC jar file (ojdbc6.jar) and the latest version of Java 1.6.
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Java Preferences can be found using Spotlight.
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Java 7 and above is for 10.7 and above, Oracle is dropping support for Java 6.
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If your using Java based programs (like the free LibreOffice) then certainly disable Java in all web browsers and applets in Java Preferences.
Apple has a now annual OS X upgrade cycle that is causing havoc and disqualifying older, but perfectly working machines from running necessary software and dragging third party developers along.
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It's sad, because OS X Snow Leopard has 1/4 OS X market share still and many can't upgrade because developers are not issuing 10.7/10.8 versions of their software because of AppStore and Gatekeeper signaling the closing of the operating system in the future.
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Graphical programs not running--need help

Using win98 platform, textpad, and jdk1.5.0...
DOS programs run fine, however, graphical applications do not run--it goes to the DOS window and brings up strings of stuff instead.
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If anyone deems it a necessity, here is an example of simple code that will throw this problem:
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import java.event.*;
import javax.swing.*;
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{ public CloseableFrame()
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Getting java program to run (really basic)

Hi,
I'm used to running java programs through the programs I write with, like Eclipse, but now I'm trying to run a program on a compuyer without those things and I'm stuck.
I'm running Windows XP and have downloaded the SDK Version 1.4.2, The java.com website says I have the latest software, everything is up to date.
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Can you tell me which instructions you mean?
Thanks

Java program stopped running when using JVMPI

Hi!
I'm writting a very simple profiler using JVMPI. I intended to pause/continue it by sending signal, like kill -SIGUSR2 PID, to it, but whenever I did this, the java program that ran with the profiler stopped running, however the profiler kept running properly.
Here's the code of the simple profiler and the testing java program.
//myprofiler.cc
#include <jvmpi.h>
#include <pthread.h>
#include <stdio.h>
#include <signal.h>
void sig_handler_pause(int);
static JVMPI_Interface *jvmpi_interface;
void notifyEvent(JVMPI_Event *event) {
switch(event->event_type) {
case JVMPI_EVENT_CLASS_LOAD:
fprintf(stderr, "myprofiler> Class Load : %s\n", event->u.class_load.class_name);
break;
case JVMPI_EVENT_OBJECT_ALLOC:
fprintf(stderr, "myprofiler>object alloc \n");
break;
extern "C" {
JNIEXPORT jint JNICALL JVM_OnLoad(JavaVM jvm, char options, void *reserved) {
fprintf(stderr, "myprofiler> initializing ..... \n");
// get jvmpi interface pointer
if ((jvm->GetEnv((void **)&jvmpi_interface, JVMPI_VERSION_1)) < 0) {
fprintf(stderr, "myprofiler> error in obtaining jvmpi interface pointer\n");
return JNI_ERR;
// initialize jvmpi interface
jvmpi_interface->NotifyEvent = notifyEvent;
// enabling class load event notification
jvmpi_interface->EnableEvent(JVMPI_EVENT_CLASS_LOAD, NULL);
fprintf(stderr, "myprofiler> .... ok \n\n");
signal(SIGUSR2,sig_handler_pause);
return JNI_OK;
void start(){
          fprintf(stderr,"start...\n");
     jvmpi_interface->EnableEvent(JVMPI_EVENT_OBJECT_ALLOC, NULL);
jvmpi_interface->EnableEvent(JVMPI_EVENT_CLASS_LOAD,NULL);
void pause(){
          fprintf(stderr,"pause...\n");
          jvmpi_interface->DisableEvent(JVMPI_EVENT_OBJECT_ALLOC, NULL);
jvmpi_interface->DisableEvent(JVMPI_EVENT_CLASS_LOAD,NULL);
int status=0;
void sig_handler_pause(int sig){
     if(status == 0){
          start();
          status = 1;
     else if(status == 1){
          pause();
          status = 0;
//Test.java
public class Test {
public static void main(String[] args) {
     try {
                    int i = 0;
while(true)
                         Thread.sleep(1000);
                    System.out.println(i++);
          catch (Exception e) {
                    e.printStackTrace();
Here're some notes:
1)If I didn't call
jvmpi_interface->EnableEvent(JVMPI_EVENT_OBJECT_ALLOC, NULL);
in "start()" function, the java program Test ran properly after I sent signal to the process by using kill command in an command line;
or
2) If I delete "Thread.sleep(1000)" in Test.java, then whether I call
jvmpi_interface->EnableEvent(JVMPI_EVENT_OBJECT_ALLOC, NULL);
in "start()" or not, the Test program ran properly after I sent signal to the process.
It seems to be a thread dead lock, but I'm not sure. Can any body help?Thanks very much.

I should strongly recommend moving from JVMPI to JVM TI if you can. The reason is that JVMPI has been deprecated since 5.0 and can not be used with Java SE 6 and newer.
Anyway, the issue you have may be due to the signal you are using. I'm not sure which operating system this is but on Linux the USR2 signal is used for the suspend/resume implementation. Have you looked at the Troubleshooting Guide or the Signal Chaining page for details on how signals are used and how to chain handlers? Another idea is to remove the signal handling code implementation and to use the data dump event. This is supported by both JVMPI and JVM TI so that you get an event (via the QUIT signal).

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