mple,
UNIX runtime objects might support the <code>getenv()</code> and <code>setenv()</code>
functions. Other runtime objects, such as MacOS, may not support <code>getenv()</code>
and <code>setenv()</code> because the host operating system doesn't.
<p>
Because the Runtime class is tightly integrated with the implementation of the
Java interpreter, the Java Virtual Machine and the host operating system, it is
system dependent. If objects in your program message the Runtime object directly,
your program is li