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Optimizing regular expressions in Java – Java World
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If you will use a regular expression more than once in your program, be sure to compile the pattern using
Pattern.compile()instead of the more directPattern.matches(). -
Also remember that you can re-use the
Matcherobject for different input strings by calling the methodreset(). -
If you don’t really need to capture the text inside a
group, always use non-capturing groups. For example, use “(?:X)” instead of “(X)“.
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Optimizing regular expressions in Java – Java World
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it would be better to use the reluctant quantifier “
*?” and change the sub-expression to “.*?a“. -
instead of using “
a(.*)a“, it’s much better to use “a([^a]*)a“.
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ISO 8583 – Wikipedia, the free encyclopedia
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ISO 8583 Standard for Financial Transaction Card Originated Messages – Interchange message specifications is the International Organization for Standardization standard for systems that exchange electronic transactions made by cardholders using payment cards.
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The vast majority of transactions made at Automated Teller Machines use ISO 8583 at some point in the communication chain, as do transactions made when a customer uses a card to make a payment in a store.
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Cardholder-originated transactions include purchase, withdrawal, deposit, refund, reversal, balance inquiry, payments and inter-account transfers. ISO 8583 also defines system-to-system messages for secure key exchanges, reconciliation of totals, and other administrative purposes.
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Although ISO 8583 defines a common standard, it is not typically used directly by systems or networks. Instead, each network adapts the standard for its own use with custom fields and custom usages.
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