Java Runtime on Linux

I am having some problems with the use of Runtime on a linux box.  My Runtime command that I would like to use is:

String command = "top -b -n 1 |grep 'CPU STATES'";                  
Process child =Runtime.getRuntime().exec(command);

but it returns nothing even

But I can use:
String command = "top -b -n 1";                  
Process child =Runtime.getRuntime().exec(command);

It seems as though the grep screws the call up.  I am being forced to use Java1.3.  Thanks a head of time for any suggestions.
prmussonAsked:
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brettmjohnsonCommented:
here is an interesting tutorial on navigating the pitfalls of Runtime.exec():
http://www.javaworld.com/javaworld/jw-12-2000/jw-1229-traps.html

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prmussonAuthor Commented:
I see, very helpful  I just ended up parsing the string to the important information.  Thanks.
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