Trouble with java.exe

I'm new to using Java, here is my problem, I'm running windows XP professional, I've download and installed j2re1.4.1, when I try to open Java.exe, a DOS command screen opens and closes and nothing else happens, when I try to open one of the games that came with it nothing happens. What am I doing wrong? Please help.

you can't 'open' java.exe
That file represents the Java interpreter. It must be passed a valid .class file that contains a main() function.
Check out the java tutorial on how to write and run java apps.

Similar Messages

How to get Class Name given along with java.exe

Hi friends,
I am Mukesh, currently facing one problem
On command prompt to execute any java program we give :
C : \.-- > java ClassName
This ClassName I need in my application, I want to do some post processing on that.
Actually see what I want :
public class Base
static Base object;
public static void main(String[] args) throws Exception
object=(Base)Class.forName("Derived Class Name").newInstance();
void main()
public class Derived extends Base
void main()
System.out.println("Hello World");
I am trying to Run Derived Class, since there is no entry point found, default JVM invoke the Base class's entry point, there I want to load
Derived Class, but I am not getting any identity of derived class in Base class.
I found one temporary solution to this problem :
C: \ -- >java Derived Derived
& in Base class, I have loaded class
object=Class.forName(args[0]).newInstance();
But I dont want to write the same thing twise just to know the Class name which is given along with java.exe.
Is there any way to get the ClassName supplied with java.exe
I have tried a lot, still I am trying !!!
If any one knows the answer, help me.
Regards.
Mukesh.

Multiple post. Please continue in other thread
http://forum.java.sun.com/thread.jspa?threadID=5196980&tstart=0

Execution problem with java.exe

Hi everybody. I am a student in a belgian university, and i've got a problem with the execution of my binaries in the JVM.
I'm developping my project with Eclipse. When I build the project, Eclipse launch perfectly my application with javaw.exe (I supposed it because it's written in the console when I run the project).
Thus, I wanted to try to launch my application by myself, to check if everything is right...
My project is composed like this :
- creavea/src : the sources of my project (a package called "main" , and a package "com.creavea. ..." and other .jar files like a MySQLConnector/J, edtFTPj, the JOutlookBar by lf2prod, ...
- creavea/bin : Eclipse puts the binaries there, when I run my project.
- creavea/files : Somes files like configuration files for my application, etc ...
- creavea/images : Images for my interface.
- the main class, containing the pubilc static void main method, is called CreaGesta, and is in the "main" package.
creavea is the name of my project, but i think you supposed it !
I want to run the binaries, then i do this :
- I open a ms-dos console
- I'm going in the C:\eclipse\workspace\creavea\bin folder
- I execute the command : java main.CreaGesta ...
And it doesn't work :'( ! An error appears :
Exception in thread "main" java.lang.NoClassDefFoundError : com/lf2prod/common/swing/JOutlookBar.
This class, JOutlookBar is used by my application, and the jar file containing the class is in my /bin folder. I can't understand, i'm a little bit disapointed.
It's my first big project in Java, then i don't really understand what's happening. So if someone can help me, it will be really nice for me ! Thanks a lot for your help !
J�r�me - Belgium

Thank you for your reply Atmguy ! I put in my command the classpath of the jar's who are in my /bin folder.
Like this : java -classpath edtftpj-1.4.9.jar; jdom.jar;l2fprod-common-outlookbar.jar;mysql-connector-java-3.1.8-bin.jar main.CreaGesta But now, i've got an other error message :
Exception in thread "main" java.lang.NoClassDefFoundError : main/CreaGestaOh, it changed ! but I don't understand the problem . What does it mean? "Java cannot find the class main/CreaGesta", or "An error occured in main.CreaGesta" ?
Can somebody help me to solve this new error ? Thank you !

Problem with java.exe

Hi there, I have had Java 1.4 SDK running on my machine now for several month however I am now experiencing problems when trying to run java.exe....
Whenever I try to run (for example):
java helloWorldI get the following error message:
Exception in thread "main" java.lang.NoClassDefFoundError: helloWorld
Yes I did compile the files... and yes I am in the right direcotry.. this happens on every single file I have. Can anyone suggest what might be wrong? And how to fix this... also no java applets will run on the web.
Thankyou, Mark.

Type the following at the command line:
echo %CLASSPATH%
The result should contain a . with ; around it (unless it's the first/last item). This means to include the current directory in the search path for java classes.
Without this java will only search the locations specified in the classpath.
To add it you need to set an environment variable, if you have NT/2K/XP you can do this from the 'advanced' tab of the system properties, on other OS's I cant remember the permanent manner but for a temporary fix you could type:
set CLASSPATH=%CLASSPATH%;.
At the command line then type:
java <My Progam Name>
Hope this helps.

I have trouble with APSDeamon.exe

I also have trouble with starting I Tunes. Can you send a programtool to solve this problem?

Hi Tonnie Blommaart,
If you are having issues with APSDaemon.exe and iTunes not launching, you may find the following article helpful:
Apple Support: iTunes for Windows and the iCloud Control Panel may not launch when APSDaemon (Apple Push) is running
http://support.apple.com/kb/TS4194
Regards,
- Brenden

Trouble with java security manager

I have set up a security manager for my webapp running on Tomcat. The application enables the user to write his own scripts using Javascript, that's why I need to set up a security manager.
Using Rhino as script interpreter, it is possible to use the standard java security mechanisms, e.g. using the security manager to handle the scripts' rights.
I've added the following lines to my policy file:
// give server all rights
grant codeBase "file:webapp/WEB-INF/-" {
     permission java.security.AllPermission;
//rights granted to scripts
grant codeBase "file:restrictedClient" {
     permission java.io.FilePermission "webapp/WEB-INF/lib/js.jar", "read";
I've assigned the scripts to the "restrictedClient" code base. However, the script execution fails as the script does not have the permission to access or define classes of any package (even standard java packages like java.lang or java.math).
In java.security, I have found the following comment:
# List of comma-separated packages that start with or equal this string
# will cause a security exception to be thrown when
# passed to checkPackageDefinition unless the
# corresponding RuntimePermission ("defineClassInPackage."+package) has
# been granted.
# by default, no packages are restricted for definition, and none of
# the class loaders supplied with the JDK call checkPackageDefinition.
#package.definition=
I now wonder, why the checkPackageDefinition is checked though there's no entry for any package to be checked.
Extending the policy file like
grant codeBase "file:restrictedClient" {
     permission java.lang.RuntimePermission "accessClassInPackage.webapp/WEB-INF/classes/org/mozilla/javascript";
     permission java.io.FilePermission "webapp/WEB-INF/lib/js.jar", "read";
     permission java.lang.RuntimePermission "defineClassInPackage.java.io";
     permission java.lang.RuntimePermission "defineClassInPackage.java.util";
     permission java.lang.RuntimePermission "defineClassInPackage.java.net";
     permission java.lang.RuntimePermission "defineClassInPackage.java.sql";
     permission java.lang.RuntimePermission "defineClassInPackage.java.lang";
     permission java.lang.RuntimePermission "defineClassInPackage.java.math";
     permission java.lang.RuntimePermission "de.methodpark.pkit.facade.impl";
works, but an unpleasant feeling remains :-).
Rhino creates an own classloader for script execution. Could that be the source of the strange behaviour?
Any help would be appreciated!
Regards,
Matthias

David,
I was glad to see your post regarding WLS 9.2 and the troubles with enabling Java Security Manager.
Were you able to learn any more on things like - why doesn't the admin console work when the security manager is enabled with the default policy file. Also, why is it so difficult to add permissions for your own applications and get them to actually work.
I'd be curious to see if you were able to get it to work or if you have any insights or resources that can help with this as we are really struggling to get a restrictive policy file that works.
Thanks,
D

Trouble with firefox.exe of Win7-64bit since last firefox update

firefox has been working fine on my laptop running win7-64bit until the last firefox update and now when i close firefox and attempt to reopen it at a later time, i get the error message that ff is still running and i have to shut it down. i go to task mgr and have to close firefox *32.exe. why am i just now having trouble with this, i wonder? thank you in advance for any and all help with this matter. it's very annoying.

See:
*https://support.mozilla.org/kb/Firefox+is+already+running+but+is+not+responding
*http://kb.mozillazine.org/Profile_in_use

A simple Java program to be compiled with ojc and executed with java.exe

Hi ,
This thread is relevant to Oracle Java Compiler (file ojc) and jave.exe file.
I have written a simple java program which consists of two simple simple classes and using the JDev's 10.1.3.2 ojc and java files , i'm trying to execute it after the successful compilation....
The problem is that trying to run it... the error :
Exception in thread "main" java.lang.NoClassDefFoundError: EmployeeTest
appears.
How can i solve this problem...????
The program is as follows:
import java.util.*;
import corejava.*;
public class EmployeeTest
{ public static void main(String[] args)
   { Employee[] staff = new Employee[3];
      staff[0] = new Employee("Harry Hacker", 35000,
         new Day(1989,10,1));
      staff[1] = new Employee("Carl Cracker", 75000,
         new Day(1987,12,15));
      staff[2] = new Employee("Tony Tester", 38000,
         new Day(1990,3,15));
      int i;
      for (i = 0; i < 3; i++) staff.raiseSalary(5);
for (i = 0; i < 3; i++) staff[i].print();
class Employee
{ public Employee(String n, double s, Day d)
{ name = n;
salary = s;
hireDay = d;
public void print()
{ System.out.println(name + "...." + salary + "...."
+ hireYear());
public void raiseSalary(double byPercent)
{ salary *= 1 + byPercent / 100;
public int hireYear()
{ return hireDay.getYear();
private String name;
private double salary;
private Day hireDay;
For compilation... i use :
D:\ORACLE_UNZIPPED\JDeveloper_10.1.3.2\jdev\bin\ojc -classpath D:\E-Book\Java\Sun_Java_Book_I\Corejava EmployeeTest.java
For execution , i issue the command:
D:\ORACLE_UNZIPPED\JDeveloper_10.1.3.2\jdk\bin\java EmployeeTest
NOTE:I tried to use the jdk of Oracle database v.2 but the error :
Unable to initialize JVM appeared....
Thanks , a lot
Simon

Hi,
Thanks god....
I found a solution without using Jdev.....
C:\oracle_files\Java\Examples>SET CLASSPATH=.;D:\E-Book\Java\Sun_Java_Book_I\Corejava
C:\oracle_files\Java\Examples>D:\ORACLE_UNZIPPED\JDeveloper_10.1.3.2\jdk\bin\javac EmployeeTest.java
C:\oracle_files\Java\Examples>D:\ORACLE_UNZIPPED\JDeveloper_10.1.3.2\jdk\bin\java EmployeeTest
What does Ant has to do with this?Sorry, under the Ant tree a classpath label is found....I'm very new to Java and JDev...
You need to include the jar file that has the Day method in it inside project properties->libraries.I have not .jar file.. just some .java files under the corejava directory.... By the way , I have inserted the corejava directory to the project pressing the button Add Jar/Directory.... , but the problem insists..
Thanks , a lot
Simon

So sick of having trouble with Java and Mac!

I bought myself a brand new MacBook Pro OS X 10.5.8 for around a year ago. Since the first month I've had so many problems with my Java. It's eighter not working, or its is so slow that you can't work with it, at all.
Yesterday I was playing a game, were you're in need of Java. It worked perfectly. Then suddenly, it stopped again. And I tought, since I had not used it for a while, I just had to update it. So I clicked at the "software update" and updated everything. I don't think Java was at the list. Still wasn't working. So I went to Apple.com and searched for the "Mac OS X 10.5 update 10" and found it. I downloaded it, and installed it about five times or something, still not working. I've tried everything that came to my mind to try fixing it, but nothing works. What can I do? I'm so sick of having this problem every time I'm in use of the mac. Realy start to regreat the expensive bought of this mac.
Please, someone help me. I hate the tought of wasting 16 000,- Nok at this pc, when it's not working the way I'm using it..
And sorry for the bad english, I'm only 15..

Hei Kristine, er engelsk ikke så ille!
Very Important, how much Free Space is on your Hard Drive first of all? Click on the Macintosh HD on the Desktop, then do a Get Info on it.
Could be many things, we should start with this...
"Try Disk Utility
1. Insert the Mac OS X Install disc, then restart the computer while holding the C key.
2. When your computer finishes starting up from the disc, choose Disk Utility from the Installer menu at top of the screen. (In Mac OS X 10.4 or later, you must select your language first.)
*Important: Do not click Continue in the first screen of the Installer. If you do, you must restart from the disc again to access Disk Utility.*
3. Click the First Aid tab.
4. Select your Mac OS X volume.
5. Click Repair Disk, (not Repair Permissions). Disk Utility checks and repairs the disk."
http://docs.info.apple.com/article.html?artnum=106214
Then try a Safe Boot, (holding Shift key down at bootup), run Disk Utility in Applications>Utilities, then highlight your drive, click on Repair Permissions, reboot when it completes.
(Safe boot may stay on the gray radian for a long time, let it go, it's trying to repair the Hard Drive.)
If perchance you can't find your install Disc, at least try it from the Safe Boot part onward.

Trouble with "java.lang.OutOfMemoryError: Java heap space"

Hello,
I use a Java-based modeling tool that very few out there are probably familiar with. This tool allows me to run models (program) from within the development environment, to create Applets or create jar files that can be executed in a stand-alone fashion.
I am using a database on my local harddrive to read in some data using JDBC, so am not using the Applet option with certificates. The development environment is expensive, so can't be distributed. That leaves the stand-alone option.
The model (program) I've written runs perfectly fine in the development environment and, previously, has worked fine as a stand-alone program. However, the stand-alone option isn't working anymore, because I keep getting this error.
I am not much of a Java programmer; I'm learning as I go along. If anyone can help me solve this, I'll be most appreciative
From my cmd prompt:
C:\Documents and Settings\072\Desktop\TA\for\for Applet Files>cd "C:\D
ocuments and Settings\072\Desktop\TA\for\for Applet Files"
C:\Documents and Settings\072\Desktop\TA\for\for Applet Files>java -cl
asspath enterprise_library.jar;business_graphics_library.jar;for.jar;xjanylog
ic5engine.jar for/Main$Simulation
Started...
AnyLogic simulation engine has started [$Id: Engine.java,v 1.134 2004/12/03 08:4
9:39 basil Exp $]
java.lang.OutOfMemoryError: Java heap space
setting error: Exception during root.courseQueue-1556 startup: java.lang.OutOfMe
moryError: Java heap space
thread = Thread[Model Creation Thread,5,main]
engine = com.xj.anylogic.Engine@1099257
Exception in thread "Image Fetcher 0" java.lang.OutOfMemoryError: Java heap spac
e
java.lang.OutOfMemoryError: Java heap space
setting error: Exception during startup: java.lang.OutOfMemoryError: Java heap s
pace
thread = Thread[Model Creation Thread,5,main]
engine = com.xj.anylogic.Engine@1099257
java.lang.OutOfMemoryError: Java heap space
setting error: Exception in statechart 'root.courseExit-0.inputProcessor' entry
actions: java.lang.OutOfMemoryError: Java heap space
thread = Thread[AnyLogic main thread,5,main]
engine = com.xj.anylogic.Engine@1099257
java.lang.OutOfMemoryError: Java heap space
setting error: Exception in statechart 'root.courseDelay-0.inputProcessor' entry
actions: java.lang.OutOfMemoryError: Java heap space
thread = Thread[AnyLogic main thread,5,main]
engine = com.xj.anylogic.Engine@1099257
java.lang.OutOfMemoryError: Java heap space
setting error: Exception in statechart 'root.courseDelay-1.inputProcessor' entry
actions: java.lang.OutOfMemoryError: Java heap space
thread = Thread[AnyLogic main thread,5,main]Exception in thread "AWT-EventQueu
e-0"
java.lang.OutOfMemoryError: Java heap space
engine = com.xj.anylogic.Engine@1099257

Hi I am ancountering the same problem with the 'heap space'.
Is there any way I can find out what it is set to for my system? I dont believe its 32Mb and dont want to increase it randomly to too large a size if theres no need for it.
Thanks,
Bobby

Trouble with java

I have three computers with different running systems, vista, xp and the other i dont remember. We are experiencing java problems with all three. We cannot play games on pogo, chat on my homework pages or even play games on java's web site and sometimes the sites just shut down. We have tried numerous changes through javas website to no avail...does anyone have any ideas?

and why are you asking this here? we are not a "fix my computer" forum. You will need to look elsewhere.

Having Trouble with Java Cryptography Extension (JCE)

Hi, this is my first attempt at using the JCE. I'm using JCE 1.2.1
and basically all I'm trying to do at this point is encrypt a
FileInputStream object using the DES standard, with the JCE
classes. Here is my code Fragment.
protected FileOutputStream encriptFile(FileInputStream baseFile,
File encFileName) throws IOException
try
// Create the output file for the encrypted document
FileOutputStream encriptedFile = new FileOutputStream
(encFileName);
// Must register the provider that implements the algorithm
Provider sunJce = new com.sun.crypto.provider.SunJCE();
Security.addProvider(sunJce);
char[] pbeKeyData = password.toCharArray();
PBEKeySpec pbeKeySpec = new PBEKeySpec(pbeKeyData);
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance
("DES");
SecretKey pbeKey = keyFactory.generateSecret(pbeKeySpec);
Cipher pbe = Cipher.getInstance("DES"); // Same as above.
pbe.init(Cipher.ENCRYPT_MODE, pbeKey);
CipherOutputStream cout = new CipherOutputStream
(encriptedFile, pbe);
// Use a byte array to write the file output in blocks of 64
bytes.
byte[] buffer = new byte[64];
while (true)
int bytesRead = -1;
bytesRead = baseFile.read(buffer);
if (bytesRead == -1) break;
cout.write(buffer, 0, bytesRead);
cout.flush();
cout.close();
baseFile.close(); // Close the input file.
catch (java.security.NoSuchAlgorithmException nsA)
System.err.println(nsA);
nsA.printStackTrace();
catch (java.lang.ExceptionInInitializerError eIIE)
System.err.println(eIIE);
eIIE.printStackTrace();
catch (Exception e)
System.err.println(e);
e.printStackTrace();
My problem arises with the line "SecretKeyFactory keyFactory =
SecretKeyFactory.getInstance("DES");" This line throws an
ExceptionInInitializerError and the catch block tells me this
java.lang.ExceptionInInitializerError
java.lang.ExceptionInInitializerError: java.lang.SecurityException:
Cannot set up certs for trusted CAs
(The rst of the stackCall here)...
From what I've read in the documentation, I need to have a provider
set up that handles the SecretKeyFactory and encryption algorithms,
but the documentation also says that the SunJCE provider that I set
up near the start of my method should have been able to handle this.
Is there anyone out there with expeience doing this kind of thing
that can help.
Thanks,
Dan

Please check out the following:
1. Be sure that the jar file will be viewable from classpath and that the provider you want to use will be in java.security file.
2. In the java.security file you should have something like this:
security.provider.1=sun.security.provider.Sun
security.provider.2=com.sun.crypto.provider.SunJCE
3. If you wish, you can test your program with another JCE implementation, like cryptix.
You can download the api and documentation of cryptix at http://www.cryptix.org/products/index.html
I wish this can be useful to you!!!
Thank you for some duke dollars.

Troubles with Java Comm API

I am trying to use the Java Comm API with Windows 2000 and I can enumerate the ports (I am almost sure that the problem is the dll). Do anybody knows a solution?

Where is the problem?

Having Trouble with Java Mail and Servlets

How can I send and receive mails using Java Mail API and Servlets

You should familiarize yourself with the JavaMail API and the servlet API--this is much too broad a question to properly answer in a forum. The J2EE Tutorial shows how to send a mail message using JavaMail from a session bean, but the technique is similar to what you would use from a servlet:
http://java.sun.com/j2ee/1.4/docs/tutorial/doc/Resources5.html#wp82097
I'm sure the JavaMail documentation has an example as well.
-Ian Evans

URGENT - Running Webstart manually (with java.exe)

Hi,
A couple of months ago, someone from SUN gave me a (very long) command line to start java web start using java -cp etc...
At that time, I needed to be able to CTRL-C javaws to get a stack trace location of where JWS was stuck.
Well I need that command again! Does anyone know it ? I'm trying to find it by guessing, but it won't work...

http://www.vamphq.com/jwsfaq.html#debug
Have a nice debug.
JB.
http://www.up2go.net - WebStart @ the MAX !

Trouble with java.exe

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