Setting the CLASSPATH Sys Var

To display the current CLASSPATH variable, use these commands in Windows and Unix (Bourne shell):

In Windows:   C:\> set CLASSPATH
In Unix:      % echo $CLASSPATH

To delete the current contents of the CLASSPATH variable, use these commands:

In Windows:   C:\> set CLASSPATH=
In Unix:      % unset CLASSPATH; export CLASSPATH

To set the CLASSPATH variable, use these commands (for example):

In Windows:   C:\> set CLASSPATH=C:\users\george\java\classes
In Unix:      % CLASSPATH=/home/george/java/classes; export CLASSPATH

From: http://java.sun.com/docs/books/tutorial/java/package/managingfiles.html