Trying to use grep from within java,using exec command!

Hi all!
I would like to run a grep function on some status file, and get a particular line from it, and then pipe this line to another file.
Then perfom a grep on the new file to check how many of the lines above are present in that file, and then write this value to a new file.
The final file with a numerical value in it, i will read from within java,as one reads normal files!
I can run simple commands using exec, but am kinda stuck with regards to the above!
Maybe i should just do all the above from a script file and then run the script file from exec. However, i dont want to do that, because it kinda makes the system dependent,..what if i move to a new machine, and forget to install the script, then my program wont work!
Any advise?
Thanks
Regards

With a little creativity, you can actually do all that from the command line with a single command. It'll look a little crazy, but it can be done.
Whether the script exists on the local machine or not has zero to do with platform indpendence. You assumedly have to get the application onto the local machine, so including the script is not really an issue at all. However, you're talking about system independence, yet still wishing to run command line arguments? The two are mutually exclusive.

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With the Partitioning, OLAP, Data Mining and Real Application Testing options
ORACLE_HOME = /oracle
System name: Linux
Node name: node
Release: 2.6.18-194.17.1.el5
Version: #1 SMP Mon Sep 20 07:12:06 EDT 2010
Machine: x86_64
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*** SERVICE NAME:(SYS$USERS) 2011-07-12 09:45:03.637
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ORA-06512: at line 1
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