where are the jdk inbuilt classes located?

Dominik · 02-19-2004, 02:18 AM

Hello guys,

I've installed jdk on freebsd but when i run java, it returns java.lang.* no class
found for the slightest prog.

On linux, it works fine, i only need to specify my personnal classpath.

Does anyone know where the java internal-classes are located? And how they are named: I found no path of the form /usr/.../java/util/ (in linux or free).

Need some help

moeminhtun · 02-19-2004, 02:53 AM

You will never need to know where the inbuild classes are located. Your problem is actually the matter of the Java compiler couldn't find your main class. Make sure you specify the classpath to the folder your main class exists or go to the same folder and run it.

UltimaGuy · 02-19-2004, 06:09 AM

All the classes are located in a jar file. I think the file will be rt.jar, but check out all the jar files inside your java installation directory. The file will be quite large, maybe > 20 MB. But to access it just set CLASSPATH to the directory and the java compiler and interpreter will find it

.

For example, if it is /opt/blahblah/*.jar then set CLASSPATH to this path and export it .

Dominik · 02-21-2004, 07:39 AM

Thanks for the answers,

I did all what you said UltimaGuy, but the problem remains.

classpath is loaded , i checked with echo. try all possibilities *.jar & wrote down the full name.jar for all the lib .jar files. I gave full access to all the linux-jdk files, nothing changed. cannot execute my java progs.

What kind of problem could it be ??

UltimaGuy · 02-21-2004, 07:43 AM

Does the user have permission to acces the folder the Java classes are?

For example, you might have installed Java as root, and so the proper privileges are not there for the user accounts ? Check it out

.

haobaba1 · 02-21-2004, 11:24 AM

I think you need to specify your main class in a manifest file inside the jar file to make the jar file executable. Then you can run it as:

java -jar app.jar

Your jar file should have a manifest file inside it adding a line similar to this should solve your problem, that is unless you have other class-path problems:

Main-Class: classname