How to get the system property ?

[qionghua yang]

Hi,
I would like to get the properties in the System, such as CLASSPATH and PATH. But when I used the following code, it always return null to me. Please help.
Properties p = System.getProperties();
System.out.println(p.getProperty("CLASSPATH"));
Thanks!
qionghua

[Cindy Glass]

WE talked about that here: http://www.javaranch.com/ubb/Forum33/HTML/002404.html

[qionghua yang]

Thanks Cindy.
Now I can get it by using the following code. But does that mean I always need to
************************************************************
Properties p = System.getProperties();
System.out.println(p.getProperty("java.class.path"));
************************************************************
But when I use this
System.out.println(p.getProperty("java.path"));
System.out.println(p.getProperty("HOMEPATH"));
the value is null. Does that mean I always need to use "java...." as my key?
How can I get the system variables in Settings->Control Panel->System->Environment?
Thanks!
qionghua