Some questions -

(a) What is your classpath  setting? I hope there are no spaces anywhere.
(b) Currently, are you compiling the program from jdk\bin folder?

its deafult classpath  setting
and yes i am compiling the code from jdk\bin folder  .
how can i compile the code by storing it on other locations other then bin.

Have you set your path setting? The path should point to the bin folder. An
example:

set path=%path%;c:\jdk1.4.2\bin;

Once you have set that, you should be able to compile your programs from any
folder. Ofcourse, depending on your operating system, the way to set the
environment variables would be slightly different. Hope this helps.