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A stack is a last in, first out (LIFO) abstract data type and data structure. Perhaps the most common use of stacks is to store subroutine arguments and return addresses.

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Simple array-based Stack class in Java

I don't see any obvious logic mistakes, points for that. On the other hand some redundant and non-standard ways of coding in java. Drop either size or topOfStack members, (topOfStack == size - 1) Dr …
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