polish stack

From: "Mr. X." <no_spam_please@xxxxxxxxxxxxxxxxx>
Date: Sat, 10 May 2008 14:46:26 +0300

Hello,
I am looking for a Java source code for Polish Stack, please.
A Polish Stack - A Stack algoritm, that is usefull for developing a tool for
computing basic formulas, with priority.
i.e a formula :
2 + 3 x 5 = 17 (and not 25, because x is perior to +)
The function that evaluate this can be done by some recrusive statements
(which I don't preffer), or by polish-stack.

If there is no source code :
What is the concept of polish stack ?

Thanks :)

.

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