Running java classes

I am a newbie to java and have installed the sdk files fine and breezyswing and terminal IO packages and it all seems to work ok because i can compile all my files fine. Even the test files i can compile and they work ok. But when i go to run the class file i always get this error
Exception in thread "main" java.lang.NoClassDefFoundError: c:\Division.class
can someone please help me.

You might want to check this link.
http://java.sun.com/docs/books/tutorial/getStarted/cupojava/win32.html
The argument to the java.exe command is a class name, not a file or path. If your class is defined as "public class Division" then the command is "java Division" Also, class names are case sensitive, so you must use Division, not division.
If you still get the NoClassDefFound error, you probably have a Classpath problem. Try to CD to the directory where Division.class file is and use the command "java -claspath . Division"
Then check the hundreds of posts in the forum concerning classpath.

Similar Messages

How can i run Java class form other java application.

Hi ,
I have problem to run java class from my java application,
I am using the class ClassLoader in order to launched the Java class , it�s work fine whenever, the class exist in the same folder , however , when i am trying to run class that is not in the current folder ,
i got error (see below),
Do you have any idea what is wrong?
java.lang.ClassNotFoundException
     at SimpleClassLoader.loadClass(SimpleClassLoader.java:110)
     at SimpleClassLoader.loadClass(SimpleClassLoader.java:53)
     at Run.main(Run.java:31)

What does "run an class" mean? You don't run classes. They're not executables.
I bet your problem is the classpath. You are aware that the classloader looks only there? Unless it's an UrlClassLoader.

Trying to run java class files from my jsp

I am having difficulty running java files from my jsp. I have compiled my two java classes and inserted them onto my server in the webapps/WEB-INF/classes/scripting directory and have imported scripting.* into my jsp page. The files both compiled ok before the class files were loaded onto the server but when I rty to run the jsp from the server, I keep getting a compiler error. Thanks in advance
Iob

Here are the few question
1) Does your java classes which u created is declared under package scripting. *.class files are to be places under the WEB-INF/classes directory only. Not under scripting. But if you java classes say are under a package called a.b. Then you need to put under classes\a\b\.

Running Java classes via .cmd files

Hi. I've a few Java classes which need to be executed every so often. I've wrote a .cmd file:
G:
cd G:\j2sdk1.4.2\bin
java utils.verifier
When it executes it successfully runs the java class but I want the cmd window to stay open? becuase when the cmd file finishes runnning it closes the window. How do I make it stay open? Could I slightly modify my verifier class to request some input, so it keeps the window open?Thanks

Alternatively, you can tweak the cmd rather than pausing it.
Check cmd/? for more info, I believe it was /K option

Run java class using JBuilder

hi,
I already import the java class forder to the src folder in JBuilder where the src folder is created by the JBuilder itself. When i run compile the program there is an error in reading the java class file but when i run the program in Textpad, the program is success. May i know why? how can i run my program using java class in JBuilder instead of Java source? Thanks.

In JBuilder there is an option of specifying what the 'main' file in a project is . Specify that to this class file
[ What I mean is , in many java files we can define 'main' method , but we will intend to execute the main of one file only for a project . In JBuilder specify this file as the main class file ]

How run java class on Mac Os X

i develope java appliction and run it on windows platform and now i need run it on Mac Os X but i am new user for Mac Os X and i dont know how i can open Unix shell to compile and run my classes and i dont need to use any tool to make this task.
thanks
rabab

The Terminal Application is in Utilities in Applications. You can use this to open your Unix shell. From there, you should be able to compile and run your java applications.

How to run java .class file?

How can i run/view .class file in java?. is there tool/utilities in java that can do that.?. Thanks

Ednut wrote:
I'm sure you must have been taught using the command: java yourClassName after navigating to the location of your compiled class in the command prompt.I'm sure the OP does not need condescending remarks from someone who knows almost as little Java as s/he does.

Running java class in command line

Hi.. i have a java class i want to run from the command line. the problem is that when i do, i get this exception:
Exception in thread "main" java.lang.NoClassDefFoundError: (class name)
The class uses some jars, so i used the -classpath option, and seperated the jars with ":".
I read in a previous topic that the solution can be to add the JRE1.5.0 to the path.
Can anyone tell me the syntax to do that? And if anyone has a different solution can they tell me? Im running it on linux debian.
Thx.

It sounds like you only have the jars in the -classpath option. If that's right, then java will only look in those jars for classes. You probably need for example .:jar1.jar:jar2.jar if you want java to look in the current directory as well as the jar files for classes.

Compling java class from another currently running java class.!

Hi,
Im using Netbeans 6.1 for my project.im creating FORMS which create code for a search page i.e. jsp file and java file at run time.i also compile the search page java code at run time.
The ONLY problem that i face while compiling is that, it does not recognizes the getter and setter for request bean, session bean and and application bean.
When i do not create these getter and setter at run time,the compilation is just perfect at run time and produces the reqiured output that i want.
BUT for further enhancement of the same code i require the request and session beans.
Can anyone tell me the solution to the problem.!
Thankx in advance

Wrapper your class in the following pair <? ?>
If you look at the LKM File to Oracle External table it defines java in a class that is then subsequently utilized. You can do this too.
Cheers
David

Can't run java .class programs from Windows command line!

I have tried to get a program that I wrote with the JDK to run from the Windows command line, but it is not working. I typed:
java HelloWorld
Where my .class was HelloWorld.class, a compiled java program. I spelled the name correctly (and I am in the correct directory), yet I get the following error:
Exception in thread "main" java.lang.NoClassDefFoundError: HelloWorld
I think something is screwy with windows, but that's just me. Any ideas??

Likely a CLASSPATH issue - try
java -classpath . HelloWorldGood Luck
Lee

Small issue: Exception in running java class

I have created a java test.class through Eclipse in some workspace. This class is using mail.jar. It is working fine with eclipse.
But if i copy test.class and mail.jar to c:\ and try to run it. It is giving me runtime exception stating
"Exception in thread "main" java.lang.NoClassDefFoundError: test"
~Aman

You can try java -cp .;mail.jar testWhich should be OK provided that class test is not part of a package, and
that compiling test.java did not result in other .class files.

Installed JDK but still error message when running java class

Hello
Can you please help me somebody?
I installed everything how it was in the book.
So I created my first script.
I ran "javac HelloUser.java" which created the class.
And then when I want to run the "java HelloUser " I always get this message:
exeption in thread "main" java.lang.NoClassDefFoundError: HelloUser
I just dont understand it. I changed the paths in the system settings as well.
Thank you
Thomas Popovits

http://onesearch.sun.com/search/onesearch/index.jsp?qt=java.lang.NoClassDefFoundError&subCat=siteforumid%3Ajava54&site=dev&dftab=siteforumid%3Ajava54&chooseCat=javaall&col=developer-forums

Error comming in running java class file

Exception in thread "main" java.lang.NoClassDefFoundError: Main (wrong name: jav
aapplication2/Main)
        at java.lang.ClassLoader.defineClass1(Native Method)
        at java.lang.ClassLoader.defineClass(ClassLoader.java:620)
        at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:12
4)
        at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)
        at java.net.URLClassLoader.access$100(URLClassLoader.java:56)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:268)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
        at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)what is the meaning of this error

Hi bhavishya,
Is this the correct path of your Main class : javaapplication2/Main ?

How to run Java class application on mac

Hi to all !
I usually develop java applications on PC which are started by typing java >classname< into DOS-console.
Now one application has to be run on MAC OS 9.2 which shurely hasn�t that console. So how can I start it there ?
Thanx in advance
Alex

They have mrj you need to install it, and to launch an application or an applet, you have no console.

How to run java class from over the web

hi i ftped my java files to an asp web site.
if it were my local computer i would open up the c prompt and run it with the command java ....
but is there a way for me to execute this java file in the same way
stephen

1. the code is a java application.
How may I run this java application on the web server
when I do not have access to the command prompt. I would discuss this with the administrator of the web server. You will need at a minimum a JRE installed on the server and permission to execute commands remotely. If the administrator decides to grant you that permission (which is not likely unless the two of you work for the same company), he should also be able to explain to you how to do that.

Running java classes

Similar Messages

Maybe you are looking for