need to specify their location. 
Use CLASSPATH to do this. 
CLASSPATH consists of a colon separated list of directories that specifies the 
path. 
For example:<P>
<pre>
    .:/home/avh/classes
</pre>
Note that the system always appends the location of the system classes
onto the end of the class path unless you use the <i>-classpath</i> option to 
specify a path.
<p>
Ordinarily, source files are compiled using <b>javac</b> then the program is 
run 
using <b>java</b>. However, <b>java</b> can be used to comp