ERROR "Exception in thread "main" java.lang.NoClas

[nitinnishi]

I have downloaded j2sdk1.4.2_08 and installed on my computer. The installtion run succesfuly and dir name j2sdk1.4.2_08 is created on c drive. I had written simple java program and compile, It cmpile but when I run using "java Program_name" at dos prompot it give error "Exception in thread "main" java.lang.NoClassDefFoundError: "
what is prob.

and also tell what is difference between j2sdk and jdk installation

thanks

[mclark]

quote:java.lang.NoClassDefFoundError

Probably because you are compiling source code which requires a library that does not come with the JDK. Try searching Google for the particular class you are missing and download the library that contains it. To include a library during compilation use the -classpath argument:

javac -classpath /mylibs/somelib.jar Program.java

quote:and also tell what is difference between j2sdk and jdk installation

The J2SDK is the same thing as JDK. Sun Microsystems uses the two names interchangably. J2SDK = Java2 Software Development Kit. JDK = Java Development Kit.

[ciderpunx]

It could also be that you haven't got your classpath environment variable set.

If you run:
 java -cp . YourClassname
In the directory in which YourClassname.class is stored and that makes it work then this is the problem. See the section on setting CLASSPATH here:

http://www.gscit.monash.edu.au/stude...env_space.html

(assuming you're using windows)

Cheers,
Charlie

--
Don't Stand on your head - you'll get footprints in your hair
                                           http://charlieharvey.org.uk
                                              http://charlieharvey.com

[bugtook]

where can i find somelib.jar so that i can put this file to my java lib.